Intersil Corporation CA3275 Datasheet

CA3275

April 1994

Features

• Two Full Bridge Drivers

• ± 150mA Maximum Current

• Logic Controlled Switching

• Direction Control

• PWM I

OUT

Control

• 18V Over-Voltage Protection

• 300mA Short-Circuit Protection

• Nominal 8V to 16V Operation

• Internal Voltage Regulation With Bandgap Reference

Applications

• Dual Full Bridge Driver For Air Core Gauge Instrumen­tation

• µP Controlled Sensor Data Displays

• Speedometer Displays

• Tachometer Displays

• Stepper Motors

Dual Full Bridge Driver

Description

The CA3275 Dual Full Bridge Driver is intended for general­purpose applications requiring Dual Full Bridge drive or
switching, including direction and pulse-width modulation for
position control. While all features of the IC may not be uti­lized or required, they would normally be used in instrumen­tation systems with quadrature coils, such as air-core
gauges, wherethe coils would bedriven atfrequencies rang­ing from 200Hz to 400Hz. The coils are wrapped at 90
angles for independent direction control. Coils wound in this
physical configuration are controlled by pulse width modula­tion, where each coil drive is a function of the sine or cosine
versus degrees of movement. The direction control is used
to change the direction of the current in the H-Driver coil.

The switch rate capability of the IC is typically 30kHz regard­less of the inductive load. Over-current limiting is used to
limit short circuit current. Over-voltage protection (in the
range of 18V to 24V) causes the device to shut down the
output current drive.Thermal shutdown limits power dissipa­tion on the chip.The CA3275 is supplied in a 14 lead dual-in­line plastic package.

Ordering Information

o

• Slave Position Indicators

Pinout

CA3275 (PDIP)

TOP VIEW

V

CC

V

CC

PWMB

DIR B

V

CC

1
2
3
4
5
6
7

COIL A-

COIL B-

14
13
12
11
10

9
8

COIL A+
GND
PWMA
DIR A
GND
GND
COIL B+

Block Diagram

SENSOR &
CONVERTER
A/D, V/F, ETC

PART NO. TEMPERATURE PACKAGE

CA3275E -40oC to +85oC 14 Lead Plastic DIP

SIN

LA

MICROPROCESSOR
PHASE, DIRECTION

& PWM CONTROL

CA3275
DUAL-H
DRIVER

LB

ROTOR

COS

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143

| Copyright © Intersil Corporation 1999

6-3

File Number

2159.3

Specifications CA3275

Absolute Maximum Ratings Thermal Information

Operating VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V

Transient VCC, 30 Seconds Maximum . . . . . . . . . . . . . . . . . . . . 24V

Peak VCC, 0.4 Seconds Maximum . . . . . . . . . . . . . . . . . . . . . . . 40V

Maximum Continuous Output Current,. . . . . . . . . . . . . . . . . . .±100mA

Each Drive

Maximum PWM Output Switching Current, . . . . . . . . . . . . . . .±150mA

Each Drive

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

Thermal Resistance θ

JA

PDIP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100oC/W

Power Dissipation, P

D

Up to +70oC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mW

Above +70oC. . . . . . . . . . . . . . . . . . .Derate Linearly at 10mW/oC

Ambient Temperature Range

Operating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40oC to +85oC

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-55oC to +150oC

Lead Temperature (During Soldering). . . . . . . . . . . . . . . . . . +265oC

At distance 1/16± 1/32" (1.59± 0.79mm) from case for 10s max

Electrical Specifications T

= -40oC to +85oC, VCC = 16V Unless Otherwise Specified

A

PARAMETERS SYMBOL MIN TYP MAX UNITS

Operating Supply Voltage Range V
Supply Current (Note 1) I
INPUT LEVELS

Logic Input, Low Voltage V
Logic Input, High Voltage V
Logic Input, Low Current, VIL = 0V I
Logic Input, High Current, VIH = 5V I

OUTPUT: RLA = RLB = 138Ω

Maximum Source Saturated Voltage V
Maximum Sink Saturated Voltage V
Differential V

Voltage, Both Outputs Saturated Diff - V

SAT

Switching Specifications

PARAMETERS SYMBOL MIN TYP MAX UNITS

CC

CC

IL

IH

IL

IH

- High - 1.2 1.75 V

SAT

- Low - 0.25 0.5 V

SAT

SAT

8 - 16 V

- 8 20 mA

- - 0.8 V

3.5 - - V

-10 - - µA

--10µA

- 10 100 mV

SOURCE CURRENT (See Figure 3)

Turn-Off Delay T
Fall Time T
Turn-On Time T
Rise Time T

SINK CURRENT (See Figure 4)

Turn-Off Delay T
Fall Time T
Turn-On Time T
Rise Time T

NOTE:

1. No load, PWMA = PWMB = 5V, DIR A = DIR B = 0V

6-4

SC-OFF

SC-F

SC-ON

SC-R

SK-OFF

SK-F

SK-ON

SK-R

--2 µs

- - 2.2 µs

--1 µs

- - 0.4 µs

- - 1.6 µs

- - 0.4 µs

- - 0.6 µs

- - 0.2 µs