MC34921AE 데이터 시트보기 (PDF) - Freescale Semiconductor

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MC34921AE

H-BRIDGE MOTOR DRIVER AND POWER SUPPLY

Freescale Semiconductor 

INTERNAL BLOCK DIAGRAM

INTERNAL BLOCK DIAGRAM

B+

CP1

CP2

VBOOST

5 V SELECT

5 V SWITCH

5 V SUPPLY

5V

3.3 V SWITCH

3.3 V

VCORE SUPPLY

VCORE

VCORE SELECT

ENC_FILTB

ENC_FILTA

5.0 V

Dual Mode

Regulator

B+

3.3 V Switching

Regulator

VCORE

Linear

Regulator

I/V

Converter

Charge Pump

Gate Voltage

Generator

Thermal

Shutdown

B+

Oscillator

Motor Driver B

B+

BPWM

BDCMA

BDCMB

APWM

ADCMA

AN3/ANALOGIN_B

AN2/ANALOGIN_A

AN1/ANALOGOUT_B

AN0/ANALOGOUT_A

MISO

MOSI

SCLK

CE

GATEOUT

A /D

Converter

and

Multiplexer

Motor Driver A

Serial I/O

Gate Driver

Active Clamp

Step

Motor Driver

SS DC Motor Driver

Supervisor

RST

Circuitry

DGND

GND

Figure 2. 34921 Simplified Internal Block Diagram

ADCMB

SA /CDCMA

SA /CDCMB

SB/LSOUT1

SB/LSOUT2

CPWMA /CDCPWM

CPWMB

CDCMA /HSOUT1

CDCMB /HSOUT2

34921

2

Analog Integrated Circuit Device Data

Freescale Semiconductor

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