ca3275 Intersil Corporation, ca3275 Datasheet

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ca3275

Manufacturer Part Number
ca3275
Description
Dual Full Bridge Driver
Manufacturer
Intersil Corporation
Datasheet
April 1994
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
Features
• Two Full Bridge Drivers
• Logic Controlled Switching
• Direction Control
• PWM I
• 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 Instrumen-
• Speedometer Displays
• Tachometer Displays
• Stepper Motors
• Slave Position Indicators
Pinout
tation
P Controlled Sensor Data Displays
150mA Maximum Current
COIL A-
COIL B-
PWMB
DIR B
V
V
V
CC
CC
CC
OUT
CA3275 (PDIP)
1
2
3
4
5
6
7
Control
TOP VIEW
|
Copyright
14
13
12
10
11
9
8
COIL A+
GND
PWMA
DIR A
GND
GND
COIL B+
©
Intersil Corporation 1999
Block Diagram
CONVERTER
A/D, V/F, ETC
SENSOR &
6-3
Description
The CA3275 Dual Full Bridge Driver is intended for general-
purpose 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 uti-
lized or required, they would normally be used in instrumen-
tation systems with quadrature coils, such as air-core
gauges, where the coils would be driven at frequencies rang-
ing 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 modula-
tion, 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 regard-
less 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 dissipa-
tion on the chip. The CA3275 is supplied in a 14 lead dual-in-
line plastic package.
Ordering Information
CA3275E
MICROPROCESSOR
PHASE, DIRECTION
& PWM CONTROL
PART NO.
TEMPERATURE
-40
o
C to +85
CA3275
Dual Full Bridge Driver
DUAL-H
DRIVER
CA3275
o
C
LA
LB
14 Lead Plastic DIP
File Number
SIN
COS
PACKAGE
ROTOR
2159.3
o

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ca3275 Summary of contents

Page 1

... 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 dissipa- tion on the chip. The CA3275 is supplied lead dual-in- line plastic package. Ordering Information PART NO. ...

Page 2

... Turn-On Time Rise Time SINK CURRENT (See Figure 4) Turn-Off Delay Fall Time Turn-On Time Rise Time NOTE load, PWMA = PWMB = 5V, DIR A = DIR Specifications CA3275 Thermal Information Thermal Resistance PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Power Dissipation 100mA 800mW ...

Page 3

... DIRA PWMA V CC INTERNAL VOLTAGE SUPPLY WITH BANDGAP REFERENCE OVERVOLTAGE PROTECTION AND THERMAL SHUTDOWN CIRCUITS DIRB PWMB FIGURE 1. CA3275 DUAL FULL BRIDGE DRIVER SCHEMATIC V CC COIL A– PWMB PWMB DIRB DIRB V COIL B– DIRA PWMA FIGURE 2. QUADRATURE STEP-MOTOR APPLICATION SCHEMATIC ...

Page 4

... TEST CONDITIONS 16V S DIR = 0V WHEN TESTING COIL - OUTPUT DIR = 4V WHEN TESTING COIL + OUTPUT DIR PWM PWM PULSE PARAMETERS 1kHz 100 AMPL = 4V FIGURE 4. SINK SWITCHING TEST CIRCUIT AND VOLTAGE WAVEFORMS CA3275 COIL C INCLUDES PROBE AND TEST CAPACITANCE 30pF 50% 90% ...

Page 5

... All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reli- able. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...

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