CA3275 View Datasheet(PDF) - Intersil

Part Name

Description

Manufacturer

CA3275

Dual Full Bridge Driver

Intersil 

CA3275

DIRA

PWMA

VCC

INTERNAL VOLTAGE

SUPPLY WITH

BANDGAP REFERENCE

OVERVOLTAGE PROTECTION

AND THERMAL SHUTDOWN

CIRCUITS

DIRB

PWMB

VCC

SHORT

CIRCUIT

PROTECTION

Q1

POWER

SHORT

CIRCUIT

PROTECTION

Q3

POWER

COIL A–

Q2

POWER

COIL A+

Q4

POWER

SHORT

CIRCUIT

PROTECTION

SHORT

CIRCUIT

PROTECTION

VCC

SHORT

CIRCUIT

PROTECTION

Q5

POWER

SHORT

CIRCUIT

PROTECTION

Q7

POWER

COIL B–

Q6

POWER

COIL B+

Q8

POWER

SHORT

CIRCUIT

PROTECTION

SHORT

CIRCUIT

PROTECTION

PWMB

DIRB

DIRA

FIGURE 1. CA3275 DUAL FULL BRIDGE DRIVER SCHEMATIC

VCC

COIL A–

1

VCC

2

VCC

3

PWMB

4

DIRB

5

VCC

6

COIL B–

7

COIL A+

14

GND

13

PWMA

12

DIRA

11

GND

10

GND

9

COIL B+

8

RA

LA

STEP

MOTOR

LB

RB

PWMA

FIGURE 2. QUADRATURE STEP-MOTOR APPLICATION SCHEMATIC

6-5

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