kit33937aekevbe evaluation board

© Freescale Semiconductor, Inc., 2009 - 2014. All rights reserved.

Freescale SemiconductorUser’s Guide

Document Number: KT33937UGRev. 2.0, 8/2014

KIT33937AEKEVBE Evaluation Board

Contents 1 Important Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2 Introduction and Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Operational Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6 KIT33937AEKEVBE Evaluation Board Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

8 Board Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

9 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

KT33937UG, Rev. 2.02 Freescale Semiconductor

Important Notice

1 Important Notice

Freescale provides the enclosed product(s) under the following conditions:

This evaluation kit is intended for use of ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY. It is provided as a sample IC pre-soldered to a printed circuit board to make it easier to access inputs, outputs, and supply terminals. This EVB may be used with any development system or other source of I/O signals by simply connecting it to the host MCU or computer board via off-the-shelf cables. This EVB is not a Reference Design and is not intended to represent a final design recommendation for any particular application. Final device in an application is heavily dependent on proper printed circuit board layout and heat sinking design as well as attention to supply filtering, transient suppression, and I/O signal quality.

The goods provided may not be complete in terms of required design, marketing, and or manufacturing related protective considerations, including product safety measures typically found in the end product incorporating the goods. Due to the open construction of the product, it is the user's responsibility to take any and all appropriate precautions with regard to electrostatic discharge. In order to minimize risks associated with the customers applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. For any safety concerns, contact Freescale sales and technical support services.

Should this evaluation kit not meet the specifications indicated in the kit, it may be returned within 30 days from the date of delivery and will be replaced by a new kit.

Freescale reserves the right to make changes without further notice to any products herein. Freescale makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Freescale assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typical”, must be validated for each customer application by customer’s technical experts.

Freescale does not convey any license under its patent rights nor the rights of others. Freescale products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Freescale product could create a situation where personal injury or death may occur.

Should the Buyer purchase or use Freescale products for any such unintended or unauthorized application, the Buyer shall indemnify and hold Freescale and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Freescale was negligent regarding the design or manufacture of the part.Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners.

© Freescale Semiconductor, Inc. 2014

KT33937UG, Rev. 2.0Freescale Semiconductor 3

Introduction and Setup

2 Introduction and Setup

2.1 Introduction

This User’s Manual describes the features, options and connections of the KIT33937AEKEVBE Evaluation Board. Freescale’s KIT33937AEKEVBE Evaluation Board is a low-voltage power stage that is an integral part of Freescale’s embedded motion control series of development tools. For additional information on Freescale’s Motion Control Development Tools go to www.freescale.com/motor control In combination with one of the embedded motion control series, control evaluation boards, it provides a ready-made software development platform for small brushless DC motors among others. An illustration of the system configurations is shown in Figure 1.

The KIT33937AEKEVBE Evaluation Board has the following features:

• Connecting the Evaluation Board via a UNI-3 connector• SPI communication between the 33937A Driver and a microcontroller• DC-Bus current and voltage sensing• Over-current detection with adjustable current maximum value• Optional input supply voltage of 8 - 42 Volts• 3.3 V, 5.0 V, and 12 V voltage generation on the boards• Output 3-phase motor connector

Figure 1 depicts the board layout with descriptions of the components.

Figure 1. System Configuration

CONTROLLERBOARD

MC33927

MOTOR

WORKSTATION

MCF523xEC, MPC555, 56800/E HYBRID CONTROLLER, S12Exx MICROCONTROLLER

OPTIONAL FEEDBACK

EVALUATION BOARD

KIT33937AEKEVBE

*

*

http://www.freescale.com/motorcontrol



2.2 About this Manual

Key items can be found in the following locations in this manual:

• Setup instructions are found in section Setup Guide. • Pin-by-pin descriptions are contained in Table 2 up to Table 10. • For those interested in the reference design aspects of the board’s circuitry, a description is provided in Design Considerations

Figure 2. KIT33937AEKEVBE Evaluation Board

2.3 Disposing of Old Appliances

The KIT33937AEKEVBE Evaluation Board must be disposed of in compliance with current local waste disposal regulations. Disposing of old appliances should be done by a qualified company.

2.4 Terms and AcronymsBLDC Brushless DC

EVB Evaluation Board

Hall sensor Sensor whose output changes based on changes in magnetic flux. Used to measure motor position.

PWM Pulse width modulation

UNI-3 User-to-Network Interface



2.5 Warnings

The KIT33937AEKEVBE Evaluation Board includes components which can reach temperatures hot enough to cause burns. To facilitate safe operation, the 8.0 to 42 V input power should come from a DC laboratory power supply that is current limited to no more than 4.5 amps.

The user should be aware of:

• Before moving scope probes, making connections, etc., it is generally advisable to power down the DC voltage supply. • Operating in lab setups that have grounded tables and/or chairs should be avoided. • It is also advisable to wear safety glasses, avoiding wearing ties and jewelry, use shields, and operate by personnel trained in

power electronics lab techniques are also advisable.

2.6 Setup Guide

Setup and connections for the KIT33937AEKEVBE Evaluation Board are straightforward. The KIT33937AEKEVBE Evaluation Board connects to a Freescale embedded motion control series control board via a 40-pin ribbon cable. The motor’s power leads plug into output Motor connector (J100). Figure 3 depicts a completed setup.

Follow these steps to set up the board:

1. Plug one end of the 40-pin ribbon cable supplied with Freescale’s embedded motion control series control boards into input UNI-3 connector (J200), located at the edge of the KIT33937AEKEVBE Evaluation Board.

2. Plug the free end of the cable into the control board’s 40-pin connector.

3. Connect a 8.0 to 42 VDC power supply either to the power jack J7 labelled “8-42 V”, or to the connector J1.

4. If protection features are desired, set the overcurrent detection comparator trimmer, R114, to 2.75 V. This value limits DC bus current to 3.0 amps.

5. Apply power to the KIT33937AEKEVBE Evaluation Board. The yellow power-on LED is lit when power is present. Note that the KIT33937AEKEVBE Evaluation Board doesn’t power the control board, so the control board must be powered by means of an external 12 VDC power supply to run a complete system.

Figure 3. KIT33937AEKEVBE Evaluation Board Setup

MOTOR

MC33297

12-VOLTPOWER SUPPLY

CONTROL BOARD

40-PINRIBBON CABLE

J1

Evaluation Board

J4

8-42 VdcPOWER SUPPLY

33937A Evaluation

Board


Operational Description

3 Operational Description

3.1 Introduction

Freescale’s embedded motion control series KIT33937AEKEVBE Evaluation Board is a 8.0 to 42 VDC, 4.5 amp, surface-mounted power stage. In combination with one of the embedded motion control series control boards, it provides a software development platform that allows algorithms to be written and tested without the need to design and build a power stage for small brushless DC motors, amongst others. It supports algorithms that use Hall sensors, a Quadrature encoder, and Zero-cross signals for sensor-less control.

The KIT33937AEKEVBE Evaluation Board has an overcurrent protection that is implemented on the 33937A driver and is independent of the control board. Current measuring circuitry is set up from -4.5 to 4.5 amps full scale. In a 25 °C ambient operation at up to 4.5 A, continuous RMS output current is within the board’s thermal limits.

The control interface is created via the 40-pin ribbon cable connector J200. Pin assignments for the input connector are shown in Figure 4. Power connections to the motor are made on output connector J100. Phase A, B, and C are labelled on the board. Power requirements are met by a single external 8.0 to 42 V, 5.0 A power supply. Two connectors, labelled J7 and J1, are provided for the power supply. Both are located in one corner of the board.

For design information, see Design Considerations.

3.2 Electrical Characteristics

The electrical characteristics in Table 1 apply to operation at 25 C and a 12 VDC power supply voltage.

4 Pin Description

4.1 Connectors and Test Points

Inputs and outputs are located on connectors and test points. Pin descriptions for each of these connectors and the test points are identified in following information.

4.2 40-Pin Connector J200

Signal inputs and outputs are grouped together on the 40-pin connector J200, located on the top of the board. Pin assignments and descriptions are shown in Figure 4. Pin descriptions are listed in Table 2.

Table 1. Electrical Characteristics

Characteristic Symbol Min. Typ. Max. Units

Power Supply Voltage VDC 8.0 12 42 V

Quiescent Current ICC — 10.4 — mA

Logic 1 Input Voltage VIH 2.1 — — V

Logic 0 Input Voltage VIL — — 0.9 V

Analog Output Range VOUT 0.0 — 3.3 V

Bus Current Sense Voltage ISENSE — 366 — mV/A

Bus Voltage Sense Voltage VBUS — 69 — mV/V

Power MOSFET On Resistance RDS(ON) — 45 55 mOhm

Continuous Output Current ID — — 4.5 A

Pulsed Output Current IDM — — 30 A

Total Power Dissipation PDISS — — 2.4 W


Pin Description

Note that some J200 signals have a different usage than in the standard UNI-3 Interface. This is due to the need for the SPI communication 33937A driver and the driver control signals - Reset, Enable, and Overcurrent. Some pins on J200 are not connected, in comparison to the UNI-3 standard. Changed pin assignments are shown in Table 2

For more information refer to Table 9

Table 2. Changed Pins’ Descriptions

Pin # UNI-3 Standard J12 Connector

19 +15 V_A / +12 V_A +12 V

20 -15 V_A / -12 V_A Not connected

23 I_sense_A SPI_CSB

24 I_sense_B SPI_SO

25 I_sense_C SPI_SI

26 Temp_sense SPI_SCLK

29 Brake_control DRV_INT

30 Serial_con DRV_RST

31 PFC_PWM DRV_EN

32 PFC_enable OC_IRQ

33 PFC_z_c Not connected

38 BEMF_sense_A Not connected

39 BEMF_sense_B Not connected

40 BEMF_sense_C Not connected


Pin Description

Figure 4. 40-Pin Input Connector J200

40393837363534333231302928272625242322212019181716151413121110987654321

NCNCNCShieldingZero_cross_CZero_cross_BZero_cross_ANCcOC_IRQDRV_ENDRV_RSTINTShieldingReservedSCLKSISOCSBI_sense_DCBV_sense_DCBNC+12V_AGNDAGNDA+5V_A+5V_D+5V_DGNDGNDPWM_CBShieldingPWM_CTShieldingPWM_BBShieldingPWM_BTShieldingPWM_ABShieldingPWM_AT

SCHEMATIC VIEW

J200

CON/40

2468

10121416182022242628303234363840

13579111315171921232527293133353739

ShieldingShieldingShieldingShieldingShieldingGND+5V_D+5V_AGNDA-12V_AI_sense_DCBSOSCLKShielding_ADRV_RSTOC_IRQZero_cross_AZero_cross_CNCNC

PWM_ATPWM_ABPWM_BTPWM_BBPWM_CTPWM_CB

GND+5V_DGNDA

+12V_AV_sense_DCB

CSBSI

ReservedINT

DRV_ENReserved

Zero_cross_AShielding_A

NC

PHYSICAL VIEW

B


Pin Description

NOTE* Pins which are connected differently than in the User Network Interface, Version 3.0 (UNI-3) standard.

Table 3. Connector J200 Signal Description

Pin # Signal Name Description

1 PWM_ATPWM_AT is the gate drive signal for the top bridge of phase A. A logic high at input connector J10 turns on the phase A top switch

3 PWM_ABPWM_AT is the gate drive signal for the bottom bridge of phase A. A logic high at input connector J10 turns on the phase A bottom switch

5 PWM_BTPWM_BT is the gate drive signal for the top bridge of phase B. A logic high at input connector J10 turns on the phase B top switch

7 PWM_BBPWM_AT is the gate drive signal for the bottom bridge of phase B. A logic high at input connector J10 turns on the phase B bottom switch

9 PWM_CTPWM_AT is the gate drive signal for the top bridge of phase C. A logic high at input connector J10 turns on the phase C top switch

11 PWM_CBPWM_AT is the gate drive signal for the bottom bridge of phase C. A logic high at input connector J10 turns on the phase C bottom switch

12 GND Digital power supply ground


17 AGND Analog power supply ground

18 AGND Analog power supply ground

19 * +12V_A Analog power supply

20 * NC Not connected

21 V_SENSE_DCB V_sense is an analog sense signal that measures dc bus voltage

22 I_SENSE_DCB I_sense is an analog sense signal that measures dc bus current

23 * CSB Chip select signal of the SPI communication

24 * SO Output signal of the SPI communication

25 * SI Input signal of the SPI communication

26 * SCLK Clock signal of the SPI communication

27 NC Not Connected

28 Shielding_A Analog Shielding. Must be grounded on the power stage side only!

29 * DRV_ INT 33937A driver Interrupt signal

30 * DRV_RST 33937A driver Reset signal

31 * DRV_EN 33937A driver Enable signal

32 * OC_IRQ 33937A driver Overcurrent signal


34 Zero_cross_A Digital input. Phase A Back-EMF zero crossing

35 Zero_cross_B Digital input. Phase B Back-EMF zero crossing

36 Zero_cross_C Digital input. Phase C Back-EMF zero crossing

37 Shielding_A Analog Shielding. Must be grounded on the power stage side only!





Pin Description

4.3 SPI Communication Connectors J201 and J202

SPI signal inputs from the control board are grouped onto the 6-pin connector J201. Two signals (CSB, SO) are also available on the 2-pin connector J202. Pin descriptions are listed in Table 4 and Table 5.

The output signal SO from the 33937A driver is connected to the control board’s input signal SI, and likewise the input signal SI from the 33937A driver is connected to the control board’s output signal SO.

4.4 3-Pin Motor Connector J100

Power outputs to the motor are located on the 3-pin connector J100, labeled “Motor Connector”. Pin descriptions are listed in Table 6.

4.5 Power Supply Connectors J1 and J7

Two connectors, labelled J1 and J7, are provided for the 8.0 to 42 VDC power supply. Both connectors are used for power supply input, and are located in one corner of the board. The J7 connector is a 2.1 mm power jack for plug-in type dc power supply connections, the J1 connector is a two-wire connector. The power supply should be able to deliver at least 3.0 amps.

4.6 Connectors J2 - J6

One-pin connectors J2 - J6 provide easy access to voltages available on the board. Connector descriptions are listed in Table 7.



1 NC Not Connected


3 CSB Chip select signal

4 SCLK Clock signal

5 SO Output signal

6 SI Input signal



1 SO Output Signal

2 CSB Chip Select signal



1 Phase_A Supplies power to motor phase A.

2 Phase_B Supplies power to motor phase B.

3 Phase_C Supplies power to motor phase C.

Table 7. Connectors J3-J6 Signal Description

Connector # Signal Name Description

J2 V_BATT Power supply voltage

J3 +3.3V_A Analog power supply

J4 GND Power supply ground

J5 +5V Digital power supply

J6 +12V Digital power supply


Pin Description

4.7 Connectors J101 - J109

One-pin connectors J101 - J109 provide connections to the additional operational amplifier U100B (MC33502D) and three inverters U101D-F (74HC04). Pin descriptions are listed in Table 8.

4.8 Jumpers JP203 - JP206 for SPI Communication Selection

The jumpers JP203 - JP206 are used for SPI communication connector selection. The selection of signals is listed in Table 9.

4.9 Test points

Six test points provide easy access to the DC-Bus current and voltage sensing signals. They are listed in Table 10 along with their descriptions and locations.

Table 8. Connectors J101 - J109 Signal Description

Connector # Signal Name Description

J101 AMPi+ op. amplifier non-invert input

J102 AMPi- op. amplifier invert input

J103 AMPo op. amplifier output

J104 NEG1i invertor 1 input

J105 NEG1o invertor 2 output





Table 9. Jumpers JP1 - JP3 Selection

Jumper Name Position Comment for SPI communication

J203 1 2 For CSB signal where the UNI-3 connector is not selected

J203 1-2 For CSB signal where the UNI-3 connector is selected

J204 1 2 For SO signal where the UNI-3 connector is not selected

J204 1-2 For SO signal where the UNI-3 connector is selected

J205 1 2 For SI signal where the UNI-3 connector is not selected

J205 1-2 For SI signal where the UNI-3 connector is selected

J206 1 2 For SCLK signal where the UNI-3 connector is not selected

J206 1-2 For SCLK signal where the UNI-3 connector is selected

Table 10. Test points

Test point no. Signal Name Locations

TP100 +1.65 Ref middle side of the board

TP101 OC_TH below IC U102

TP102 VDCB below connector J200

TP103 I_DCB+ right side of the resistor R100

TP104 IDCB- left side of the resistor R100

TP105 IDCB below connector J200

Position 1-2 Position 1 2


Design Considerations

5 Design Considerations

5.1 Overview

From a systems point of view, the KIT33937AEKEVBE Evaluation Board fits into an architecture that is designed for code development. In addition to the hardware that is needed to run a motor, a variety of feedback signals that facilitate control algorithm development are provided. Input PWM signals from a control board process the 3-phase FET pre-driver 33937A. The description of the pre-driver is contained in 3-Phase FET Pre-driver 33937A.

The KIT33937AEKEVBE Evaluation Board power output stage is a complementary MOS field effect transistor (MOSFET) 3-phase bridge, capable of supplying and sensing 4.5 amps of continuous current. Feedback signals include bus voltage and the bus current. Descriptions of each of these blocks are contained in 3-Phase Driver, and in Bus Voltage and Current Feedback.

5.2 3-Phase FET Pre-driver 33937A

The 3-Phase FET Pre-driver (33937A) is a FET pre-driver for 3-phase motor control and similar applications. The IC uses Freescale's SMARTMOS technology. The IC contains 3 high-side FET pre-drivers and 3 low-side pre-driver. Three external bootstrap capacitors provide gate charge to the high-side FETs.

The IC contains internal registers to control the various operating parameters, modes and interrupt characteristics.These commands are sent and the status is read via 8-bit SPI commands. The IC will use the last 8 bits in a SPI transfer, so devices can be daisy-chained. The return value from a SPI command is obtained via the SPI port on the subsequent command. It is in the SPI communication for the next command that the response is delivered.

The IC also contains the high speed amplifier for ground current sensing, and the overcurrent comparator for overcurrent detection. For more information on the pre-driver, refer to References.

5.3 3-Phase Driver

The output stage is configured as a 3-phase driver with complementary MOSFET output transistors. It is simplified considerably by dual integrated gate drivers, each having one inverting and one non-inverting driver. A simplified schematic showing one phase is illustrated in Figure 9.

One of the most important design decisions in a motor drive is the selection of the gate drive impedance for the output transistors. In Figure 9, resistors R101 (51 ), R102 (51 ), and diode D100 determine gate drive impedance for the upper half-bridge transistor. A similar network is used on the lower half-bridge. These networks set the turn-on gate drive impedance to approximately 100 and the turn-off gate drive impedance at approximately 50 . These values produce transition times of approximately 60 ns. Transition times of this length represent a carefully weighed compromise between power dissipation and noise generation. Generally speaking, transition times longer than 250 ns tend to get power hungry at non-audible PWM rates; and transition times under 50 ns create di/dtfs so large that proper operation is difficult to achieve. The 33937A EVB is designed with switching times at the lower end of this range to minimize power dissipation.

5.4 Bus Voltage and Current FeedbackFeedback signals proportional to bus voltage and bus current are provided by the circuitry shown in Figure 8. Bus voltage is scaled down by a voltage divider consisting of R115 (47 kohms), R118 (1.8 kohms), and R120 (3.6 kohms). The values are chosen such that a 48-volt maximum bus voltage corresponds to a 3.3 volt maximum analog-to-digital (A/D) input.

Bus current is sampled by resistor R100, shown in Figure 9, and amplified by the 33937A driver. This circuit provides a voltage output suitable for sampling with A/D inputs.

The gain is given by:

A = R117 / R121 (resistors are shown in Figure 8)

The output voltage is shifted up by 1.65 V, to accommodate both positive and negative current swings. A 180 mV voltage drop across the shunt resistor corresponds to a measured current range of 4.5 A and to a voltage range from 0 to 3.3 V.

The overcurrent comparator, implemented on the 33937A driver, is adjusted by the trimmer R114 (shown in Figure 7), where a 2.75 V setting for the overcurrent detection comparator produces a 3.0 A current limit.


KIT33937AEKEVBE Evaluation Board Schematics

6 KIT33937AEKEVBE Evaluation Board Schematics

Figure 5. Power Supply

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S16H

T1

AN

OD

EC

AT

HO

DE

D4

MB

RA

160T

3

D4

MB

RA

160T

3

L1

TD

K

TH

/10

0u

H

L1

TD

K

TH

/10

0u

H

C5100nF/16V C5100nF/16V

C24

330pF

10V

C24

330pF

10V

TP

2

+12V

TP

2

+12V

R8

174k-1

%

R8

174k-1

%

1J4

GN

D

J4

GN

D

C22

10nF

10V

C22

10nF

10V

Vin

1

Gnd2

CE

3

Vout

5

U2

MC

78

PC

33

NT

RU

2M

C7

8P

C3

3N

TR

C25

1nF

10V

C25

1nF

10V

1J2

V_

BA

TT

J2

V_

BA

TT

1J3

+3.3

V_A

J3

+3.3

V_A

+C

9

22

uF

/20

V

+C

9

22

uF

/20

V

C1

10

nF

/50

V

C1

10

nF

/50

V

C23

0.1

uF

10V

C23

0.1

uF

10V

VIN

3V

OU

T2

VO

UT

4G

ND

1

U3

MC

33269S

T-3

.3T

3U3

MC

33269S

T-3

.3T

3

C1

0

10

0n

F

C1

0

10

0n

F

LE

D_

ON

1

YE

LL

OW

LE

D_

ON

1

YE

LL

OW

C19

100nF

100V

C19

100nF

100V

R6

68k

R6

68k

D3

SM

/1N

40

01

D3

SM

/1N

40

01

R7

20k-1

%

R7

20k-1

%

R3

20

0k

R3

20

0k

D2MBR0520LT3 D2MBR0520LT3

+C

62

2u

F/1

00

V

+C

62

2u

F/1

00

V

TP

1

+5V

_A

TP

1

+5V

_A

+C

13

47uF

/6.3

V

+C

13

47uF

/6.3

V

+C

21

47uF

25V

+C

21

47uF

25V

+

C233uF/16V

+

C233uF/16V

GC

1

Gro

un

d_

Co

nn

ectio

n

GC

1

Gro

un

d_

Co

nn

ectio

n

+C

12

10

uF

/6.3

V

+C

12

10

uF

/6.3

V

C14

100nF

C14

100nF

TS

1

BZ

W0

6-4

0

TS

1

BZ

W0

6-4

0

C1

1

10

0n

F

C1

1

10

0n

F

D1

MB

RD

66

0C

T

D1

MB

RD

66

0C

T

C15

100nF

C15

100nF

+C

26

1uF

100V

+C

26

1uF

100V

R1

33

0R

R1

33

0R

C17

1uF

20V

C17

1uF

20V



Figure 6. UNI-3 Connector

ZC

_A

ZC

_C

ZC

_B

PW

M_A

T

PW

M_C

T

PW

M_B

B

PW

M_B

T

PW

M_A

B

PW

M_C

BS

IS

CL

KS

O

SO

CS

B

CS

B

INT

DR

V_

EN

/DR

V_

RS

T

OC

_IR

QC

SB

SO

SI

SC

LK

+5V

_A

+5V

+12V

GN

DG

ND

GN

DA

GN

DA

GN

DA

+1

2V

+5

V_

A

GN

D

GN

DA

GN

D_

LS

FE

T

+3

.3V

_A

VD

D

+3

.3V

+5

V

V_

DC

B

I_D

CB

+1

2V

+5

V_

A

GN

DA

GN

D

+3

.3V

VD

D

+3

.3V

_A

GN

D_

LS

FE

T

+5

V

SPI

+5V_D

+5V_D

GND

GND

GNDA

GNDA

Ctrl6/PWM_CB

Shielding_A

Ctrl4/PWM_BB

Ctrl3/PWM_BT

Ctrl2/PWM_AB

Brake_control

Zero_cross_C

BEMF_sense_A

Serial_Con

I_sense_A

V_sense_DCB

Shielding_A

I_sense_DCB

Ctrl5/PWM_CT

Shielding_D

PFC_PWM

Ctrl1/PWM_AT

BEMF_sense_C

I_sense_B

Shielding_D

I_sense_C

+15V_A/+12V_A

Shielding_D

Shielding_D

Shielding_D

Zero_cross_B

Zero_cross_A

BEMF_sense_B

UNI-3 Connector

PFC_enable

PFC_z_c

Reserved

Temp_sense

-15V_A/-12V_A

+5V_A

According to UNI-3 spec.

Op

tio

na

l S

PI

Co

nn

ectio

n w

he

nth

e s

ep

ara

te 5

in-lin

e-p

in o

r6

-do

ub

le-lin

e-p

in is u

nu

sa

ble

Ze

ro c

ross p

ins -

if

ap

plic

atio

n r

un

wis

he

dw

ith

ou

t e

xte

rna

l H

S

CP

U..

..D

RV

----

---

-

----

-M

OS

I...

.SO

MIS

O..

..S

I

Pla

ce

th

e c

on

ns c

lose

to

J2

00

(fo

r ctr

l b

oa

rd c

ou

nte

rpa

rts):

UN

I-3

pin

1 t

ow

ard

s S

PI1

pin

1 &

J2

01

/J2

02

in

line

as s

ho

wn

Co

mp

atib

ility

Co

nn

ectio

ns:

p5

-SS

...C

SB

-2(J

20

2)/

-3(J

20

1)

p4

-MO

SI.

..S

O-1

(J2

02

)/-5

(J2

01

)p

3-M

ISO

...S

I-6

(J2

01

)p

2-S

PS

CK

...S

CL

K-4

(J2

01

)p

1-G

ND

-2(J

20

1)

12

J2

05

SS

el3

J2

05

SS

el3

12

J2

03

SS

el1

J2

03

SS

el1

12

34

56

J2

01

SP

I1

J2

01

SP

I1

12

J2

04

SS

el2

J2

04

SS

el2

1 2 3 4 5 6 7 8 9 10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40 J200

UN

I-3

J200

UN

I-3

12

J2

06

SS

el4

J2

06

SS

el4C

202

12nF

C202

12nF

R201

100R

R201

100R

12

J2

02

SP

I2

J2

02

SP

I2

C201

12nF

C201

12nF

R202

100R

R202

100R



Figure 7. 33937A Driver

AM

P_N

AM

P_P

AM

P_O

UT

SC

LKS

IC

SB

SO

OC

_IR

Q

DR

V_E

N

/DR

V_R

ST

INT

ZC_A

ZC_B

ZC_C

PW

M_A

B

PW

M_B

B

PW

M_C

B

PW

M_A

T

PW

M_B

T

PW

M_C

T

+5V

VD

D

+5V

VD

D

GN

D_L

SFE

T

GN

D_L

SFE

T

GN

D_L

SFE

T

DC

B_P

OS

GN

DG

ND

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

GN

D

+12V

+5V

_A

GN

D

GN

DA

GN

D_L

SFE

T

+3.3

V_A

VD

D

+3.3

V

+5V

PA

_HS

_G

PA

_LS

_G

PB

_HS

_G

PB

_LS

_G

PC

_HS

_G

PC

_LS

_GP

H_C

PH

_B

PH

_A

+12V

+5V

_A

GN

DA

GN

D

+3.3

V

VD

D

+3.3

V_A

GN

D_L

SFE

T

+5V

Pla

ce a

s cl

ose

aspo

ssib

le to

the

pins

.

Dec

oupl

ing

capa

cito

rP

lace

as

clos

e as

pos

sibl

eto

VD

D p

in o

f U10

0

Pla

ce a

s cl

ose

aspo

ssib

le to

the

pins

.

J106

NE

G2i

J106

NE

G2i

1

C11

1

470n

F/6.

3V

C11

1

470n

F/6.

3V

U10

2U

102

MC

3393

7A

Pha

seA

1

PG

ND

for Q

PU

MP

2

EN

AB

LE1

3

EN

AB

LE2

4

RE

SE

TB5

N/C

6

PU

MP

7

VP

UM

P(1

2V)

8

VS

UP

(42V

)9

Pha

seB

10

Pha

seC

11

nPA

_HS

12

PA

_LS

13

VD

D14

nPB

_HS

15

PB

_LS

16

INT

17

CS

B18

SI

19

SC

LK20

SO

21

PC

_LS

22

nPC

_HS

23

AM

P_O

UT

24

AM

P_N

25

AM

P_P

26

OC

_Out

27O

C_T

H28

VS

S29

GN

D0

30G

ND

131

VLS

_CA

P32

N/C

33P

C_L

S_S

34P

C_L

S_G

35P

C_H

S_S

36P

C_H

S_G

37P

C_B

OO

TSTR

AP

38P

B_L

S_S

39P

B_L

S_G

40P

B_H

S_S

41P

B_H

S_G

42P

B_B

OO

TSTR

AP

43P

A_L

S_S

44P

A_L

S_G

45P

A_H

S_S

46P

A_H

S_G

47P

A_B

OO

TSTR

AP

48N

/C49

N/C

50V

LS51

N/C

52N

/C53

VP

WR

54

C10

815

0nF/

50V

C10

815

0nF/

50V

+C

101

60V

2.2u

F+

C10

1

60V

2.2u

F

R12

5

10k

R12

5

10k

U10

1C

74H

C04

D

U10

1C

74H

C04

D

56

C10

615

0nF/

50V

C10

615

0nF/

50V

C10

715

0nF/

50V

C10

715

0nF/

50V

C11

2

100n

/6.3

V

C11

2

100n

/6.3

V

VC

C

GN

DU10

1A

74H

C04

D

VC

C

GN

DU10

1A

74H

C04

D

12

714

TP10

1O

C_T

HTP

101

OC

_TH

J109

NE

G3o

J109

NE

G3o1

C10

9

25V

100n

FC

109

25V

100n

F

R12

7

10k

R12

7

10k

R12

410

kR

124

10k

J107

NE

G2o

J107

NE

G2o1

C10

5

25V

100n

FC

105

25V

100n

F

J104

NE

G1i

J104

NE

G1i

1J1

05

NE

G1o

J105

NE

G1o1

R12

6

10k

R12

6

10k

J108

NE

G3i

J108

NE

G3i

1

U10

1F

74H

C04

D

U10

1F

74H

C04

D

1213

+C

104

2.2u

F/25

V

+C

104

2.2u

F/25

V

U10

1E

74H

C04

D

U10

1E

74H

C04

D

1011

C10

2

60V

1nF

C10

2

60V

1nF

+C

110

2.2u

F/25

V+

C11

02.

2uF/

25V

U10

1D

74H

C04

D

U10

1D

74H

C04

D

89

R11

4 10k

R11

4 10k

1

2

3

U10

1B

74H

C04

D

U10

1B

74H

C04

D

34

C10

3

100n

F/6.

3V

C10

3

100n

F/6.

3V



Figure 8. DC-Bus Voltage & Current Sensing

AM

P_

N

AM

P_

PI_

DC

BU

S_

PO

S

AM

P_

OU

T

I_D

CB

US

_N

EG

+3

.3V

_A

GN

DA

GN

DA

GN

DA

GN

DA

+3

.3V

_A

+3

.3V

_A

V_

DC

B

DC

B_

PO

S

DC

B_

NE

G

I_D

CB

DC

-Bu

s V

olt

ag

e &

Cu

rre

nt

Se

ns

ing

DC Bus Current Sensing

DC Bus Voltage Sensing

3.3

0V

@ 4

8V

0~

3.3

V @

-4.5

~ 4

.5A

OpA

mp is w

ithin

3P

P-A

R1

15

47

k-1

%R

11

54

7k-1

%

J1

02

AM

Pi-

J1

02

AM

Pi-

1

R1

22

1.2

k-1

%R

12

21

.2k-1

%

+ -U

10

0A

MC

33

50

2D

+ -U

10

0A

MC

33

50

2D

123

48

R1

16

10

k-1

%

R1

16

10

k-1

%

R1

29

10

kR

12

91

0k

R1

23

11

k-1

%R

12

31

1k-1

%

C1

13

10

0n

F

C1

13

10

0n

F

TP

10

4

I_D

CB

-

TP

10

4

I_D

CB

-

R1

20

3.6

k-1

%

R1

20

3.6

k-1

%

D1

07

MB

RA

16

0T

3D

10

7M

BR

A1

60

T3

R1

17

11

k-1

%

R1

17

11

k-1

%C

10

01

0n

/6.3

VC

10

01

0n

/6.3

V

J1

03

AM

Po

J1

03

AM

Po

1

R1

21

1.2

k-1

%R

12

11

.2k-1

%

TP

10

2

VD

CB

TP

10

2

VD

CB

R1

28

10

kR

12

81

0k

TP

10

3

I_D

CB

+

TP

10

3

I_D

CB

+T

P1

05

IDC

B

TP

10

5

IDC

B

+ -U

10

3B

MC

33

50

2D

+ -U

10

3B

MC

33

50

2D7

65

D1

06

MB

RA

16

0T

3

D1

06

MB

RA

16

0T

3

J1

01

AM

Pi+

J1

01

AM

Pi+

1

R1

19

10

k-1

%

R1

19

10

k-1

%

TP

10

0

+1

.65

ref

TP

10

0

+1

.65

ref

R1

18

1.8

k-1

%R

11

81

.8k-1

%



Figure 9. 3-Phase N-MOS Bridge

I_D

CB

US

_N

EG

I_D

CB

US

_P

OS

GN

D_

LS

FE

T

PA

_H

S_

G

PA

_L

S_

G

PB

_H

S_

G

PB

_L

S_

G

PC

_H

S_

G

PC

_L

S_

G

PH

_C

PH

_B

PH

_A

DC

B_

PO

S

DC

B_

NE

G

PH

_A

PH

_B

PH

_C

Cre

ate

th

e ju

nctio

ns a

s

clo

se

to

th

e r

esis

tor

R1

00

as p

ossib

le.

3-Phase N-MOS Bridge

40

mV

/1A

3-ph. Motor Connector

3-p

in M

ole

x 3

9-2

6-3

03

0 (

ma

tin

g w

ith

26

-11

-20

33

)

Tyco

ele

ctr

on

ic:

64

03

87

-3 /

Fa

rne

ll 1

45

30

26

-

p

in 1

: P

ha

se

A (

bro

wn

)

-

p

in 2

: P

ha

se

B (

red

)

-

p

in 3

: P

ha

se

C (

ora

ng

e)

3

4

6

5

Q1

04

-2

Si4

94

6E

Y

Q1

04

-2

Si4

94

6E

Y

1 2 3

J1

00

3-p

h.

Mo

tor

J1

00

3-p

h.

Mo

tor

R1

08

51

RR

10

85

1R

R1

11

51

RR

11

15

1R

D1

05

MB

RM

14

0T

3 D1

05

MB

RM

14

0T

3

3

4

6

5

Q1

05

-2

Si4

94

6E

Y

Q1

05

-2

Si4

94

6E

Y

D1

03

MB

RM

14

0T

3 D1

03

MB

RM

14

0T

3D

10

1M

BR

M1

40

T3 D

10

1M

BR

M1

40

T3

R1

04

51

RR

10

45

1R

R1

09

51

RR

10

95

1R

R1

07

51

RR

10

75

1R

R1

05

51

RR

10

55

1R

1

2

7

8

Q1

02

-1

Si4

94

6E

Y

Q1

02

-1

Si4

94

6E

Y

12

R1

00

0.0

40

-1%

R1

00

0.0

40

-1%

D1

04

MB

RM

14

0T

3 D1

04

MB

RM

14

0T

3

R1

10

51

RR

11

05

1R

1

2

7

8

Q1

00

-1

Si4

94

6E

Y

Q1

00

-1

Si4

94

6E

YR

10

15

1R

R1

01

51

RR

10

25

1R

R1

02

51

R

R1

12

51

RR

11

25

1R

D1

02

MB

RM

14

0T

3 D1

02

MB

RM

14

0T

3D

10

0M

BR

M1

40

T3 D

10

0M

BR

M1

40

T3

1

2

7

8

Q1

01

-1

Si4

94

6E

Y

Q1

01

-1

Si4

94

6E

YR

10

35

1R

R1

03

51

RR

10

65

1R

R1

06

51

R

3

4

6

5

Q1

03

-2

Si4

94

6E

Y

Q1

03

-2

Si4

94

6E

Y


Bill of Materials

7 Bill of Materials

Table 11. Bill of Materials

Qty. Reference Part Value Description Mfg. Mfg. Part No.

1 C1 10 nF/50 V Ceramic capacitor, 0805, 10 nF AVX 08055G103KAT1A

1 C2 22 F/ 16 V Ceramic capacitor, 1206, 22 F AVX 1206YD226KAT1A

3 C3, C4, C5 100 nF/ 25 V Ceramic capacitor, 0805, 100 nF AVX 08053G104KAT1A

1 C6 22 F/ 100 VElectrolytic Capacitor8.0 mm, 22 F/100 V

Jamicon SKR220M2AFBB

1 C7 100 nF/ 100 V Ceramic capacitor, 0805, 100 nF AVX 08051C104KAT1A

1 C8 100 nF/ 50 V Ceramic capacitor, 0805, 100 nF AVX 08055C104KAT1A

1 C9 22 F/ 16 V Ceramic Capacitor, 1206, 22 F/16 V AVX 1206YD226KAT1A

12C10, C11, C14, C15, C19, C20, C23, C103, C105,

C109, C112, C113100 nF/50 V Ceramic capacitor, 0805, 100 nF AVX 08055C104KAT1A

1 C12 10 F/ 6.3 V Ceramic Capacitor, 1206, 10 F/6.3 V AVX 1206ZC106KAT1A

2 C13, C16 47 F/ 6.3 V Tantal Capacitor, 1206, 47 F/6.3 V AVX 12066D476KAT1A

1 C17 1.0 F/ 10 V Ceramic capacitor, 0805, 1.0 F AVX 0805ZG105ZAT1A

2 C18, C26 1.0 F/ 50 V Ceramic capacitor, 1206, 1.0 F TDK C3216X5R1H105K

1 C21 47 F/ 16 V Ceramic capacitor, 1210, 2x 22 F/16 TDK C3225X5R1C226M

1 C22 10 nF/ 50 V Ceramic capacitor, 0805, 10 nF AVX 08055G103ZAT1A

1 C24 330 pF/ 100 V Ceramic capacitor, 0805, 330 pF AVX 08055G331ZAT1A

2 C25, C102 10 nF/50 V Ceramic capacitor, 0805, 10 nF AVX 08055G102ZAT1A

1 C101 2.2 F/ 63 V Electrolytic Capacitor, 5mm, 2.2 F/ V Jamicon SKR2R2M1JFBB

2 C104, C110 2.2 F/ 25 V Ceramic Capacitor, 1206, 2.2 F/25 V AVX 12065C225KAT1A

3 C106, C107, C108 150 nF/50 V Ceramic capacitor, 0805, 150 nF AVX 08055C154KAT1A

2 C201, C202 12 nF/50 V Ceramic capacitor, 0805, 12 nF AVX 08055G120ZAT1A

1 D1 MBRD660CT Power Rectifiers ONSEMI MBRD660CTG

1 D2 MBR0520LT1 Shottky Rectifier ONSEMI MBR0520LT1G

1 D3 SM/1N4001 Standard Rectifier ONSEMI 1N4001

3 D4, D106, D107 MBRA160T3 Shottky Rectifier ONSEMI MBRA160T3G

2 D5, D7 BAS16HT1 Switching Diode ONSEMI BAS16HT1G

1 D6 MBRA120ET3 Shottky Power Rectifier ONSEMI MBRA120ET3G

6 D100, D101, D102, D103, D104, D105 MBRM140T3 Shottky Power Rectifier ONSEMI MBRM140T3G

1 J1 CON/2 screws 2-pin connector PTR Mess Technik AR500/2

14J2, J3, J4, J5, J6, J101, J102, J103, J104, J105, J106, J107, J108, J109

EXP. HEADER 1-Way Header MOLEX 22-28-4020

1 J7 PWR Jack Power Jack type connector 2.5 mm CUI stack PJ-002A

1 J100 3-ph. Motor 3-Way Header MOLEX 39-26-3030

1 J200 UNI-3 Header 40 pins breakway connector Fisher Elektronik ASLG40G

6 J201, J202, J203, J204, J205, J206 EXP. HEADER 2-Way Header MOLEX 22-28-4020

1 LED_ON1 YELLOW 0805 LED diode yellow Chicago Miniature Lamp INC 7012x13

1 L1 TH / 100mH Inductor TDK TSL0709 -101KR66-PF

1 L2 1mH Inductor TDK SP0508-102KR19-PF


Bill of Materials

3 L3 TH / 220mH Inductor TDK TSL0709 -221KR44-PF

3 Q100, Q101, Q102 SI4946BEY DUAL N-channel MOSFET VISHAY Si4946BEY-T1--E3

1 R1 330R Resistor 330 , 5%, 0805 Multicomp MC 0.1W 0805 5% 330R

2 R2, R5 3.0 k Resistor 3.0 k, 5%, 0805 Multicomp MC 0.1W 0805 5% 3k

1 R3 200 k Resistor 200 k, 5%, 0805 Multicomp MC 0.1W 0805 5% 200k

1 R4 100 k Resistor 100 km, 5%, 0805 Multicomp MC 0.1W 0805 5% 100k

1 R6 68 k Resistor 68 k, 5%, 0805 Multicomp MC 0.1W 0805 5% 68k

1 R7 18 k-1% Resistor 18 k, 1%, 0805 Multicomp MC 0.1W 0805 1% 18k

1 R8 160 k-1% Resistor 160 k, 1%, 0805 Multicomp MC 0.1W 0805 1% 160k

1 R100 0.040-1% Resistor 0.04 , 1%, Vishay LVR03R0400FE1231

12R101, R102, R103, R104, R105, R106, R107, R108, R109, R110, R111, R112

51R Resistor 51 , 5%, 0805 Multicomp MC 0.1W 0805 5% 51R

6 R124, R125, R126, R127, R128, R129 10 k Resistor 10 k, 5%, 0805 Multicomp MC 0.1W 0805 5% 10k

1 R114 10 k Trimmer Vishay ST-4EG-103

1 R115 47 k -1% Resistor 47 k, 1%, 0805 Multicomp MC 0.1W 0805 1% 47k

2 R116, R119 10 k - 1% Resistor 10 k, 1%, 0805 Multicomp MC 0.1W 0805 1% 10k

2 R117, R123 11 k - 1% Resistor 11 k, 1%, 0805 Multicomp MC 0.1W 0805 1% 11k

1 R118 1.8 k - 1% Resistor 1.8 k, 1%, 0805 Multicomp MC 0.1W 0805 1% 1k8

1 R120 3.6 k - 1% Resistor 3.6 k, 1%, 0805 Multicomp MC 0.1W 0805 1% 3k6

2 R121, R122 1.2 k - 1% Resistor 1.2 k, 1%, 0805 Multicomp MC 0.1W 0805 1% 1k2

2 R201, R202 100R Resistor 100 , 5%, 0805 Multicomp MC 0.1W 0805 5% 100R

1 TS1 BZW06-40 Bidirectional Transient Voltage Suppressor Diode Diotec BZW06-40

1 U1 LM5007 High Voltage Step Down Switching Regulator National Semiconductor LM5007MM

1 U2 MC78PC33NTR Linear Voltage Regulator ONSEMI MC78PC33NTRG

1 U3 MC33269ST-3.3T3 Voltage Regulator ONSEMI MC33269ST-3.3T3G

1 U4 LT3433IFE High Voltage DC/DC Converter Linear Technology LT3433IFE#PBF

1 U100 MC33502D Dual Operation Amplifier ONSEMI MC33502DG

1 U101 74HC04D 6 x Invertor ONSEMI MC74HC04ADG

1 U102 MC33937APEK 3-Phase FET Pre-driver Freescale MC33937APEK

Freescale does not assume liability, endorse, or warrant components from external manufacturers that are referenced in circuit drawings or tables. While Freescale offers component recommendations in this configuration, it is the customer’s responsibility to validate their application.

Table 11. Bill of Materials

Qty. Reference Part Value Description Mfg. Mfg. Part No.


Board Layouts

8 Board Layouts

Figure 10. 33937A Evaluation Board Top Layer

Figure 11. 33937A Evaluation Board Bottom Layer


Board Layouts

Figure 12. 33937A Evaluation Board Silk-screen Layer


References

9 References

9.1 Support

Visit Freescale.com/support for a list of phone numbers within your region.

9.2 Warranty

Visit Freescale.com/warranty for a list of phone numbers within your region.

Table 12. Reference Pages

Document Number Description URL

KIT33937AEKEVBE Tool Summary Pagehttp://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=KIT33937AEKEVBE

MC33937 Product Summary Page http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MC33937

Analog Home Page www.freescale.com/analog

Freescale’s Motor Control Web Page www.freescale.com/motorcontrol

Pittman’s Motors Web Page www.pittmannet.com

UNI-3 Connector Specification

http://www.ametektip.com/index.php?option=com_content&task=view&id=168&Itemid=99&utm_source=direct&utm_medium=web&utm_term=pittmannet&utm_campaign=pittman

www.freescale.com/analog

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MC33937

http://www.freescale.com/webapp/sps/site/homepage.jsp?code=MOTORCONTROLHOME&tid=vanMOTORCONTROL

http://www.freescale.com/support


http://www.freescale.com/warranty



http://www.freescale.com/warranty

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=KIT33937AEKEVBE

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=KIT33937AEKEVBE


Revision History

10 Revision History

Revision Date Description of Changes

2.0 8/2014

• Initiated revision History page • Updated part number to MC33937APEK • Updated back page. • Updated format to current standard

Document Number: KT33937UGRev. 2.0

8/2014

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There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits based

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may vary over time. All operating parameters, including “typicals,” must be validated for each customer application by

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