6-3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright
Intersil Corporation 1999
CA3275
Dual Full Bridge Driver
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
o
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
PART NO.
TEMPERATURE
PACKAGE
CA3275E
-40
o
C to +85
o
C
14 Lead Plastic DIP
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 Instrumen-
tation
P Controlled Sensor Data Displays
Speedometer Displays
Tachometer Displays
Stepper Motors
Slave Position Indicators
File Number
2159.3
April 1994
Pinout
CA3275 (PDIP)
TOP VIEW
COIL A-
V
CC
V
CC
PWMB
DIR B
V
CC
COIL B-
COIL A+
GND
PWMA
DIR A
GND
GND
COIL B+
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Block Diagram
SENSOR &
CONVERTER
A/D, V/F, ETC
MICROPROCESSOR
PHASE, DIRECTION
& PWM CONTROL
CA3275
DUAL-H
DRIVER
LA
LB
SIN
COS
ROTOR
6-4
Specifications CA3275
Absolute Maximum Ratings
Thermal Information
Operating V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V
Transient V
CC
, 30 Seconds Maximum . . . . . . . . . . . . . . . . . . . . 24V
Peak V
CC
, 0.4 Seconds Maximum . . . . . . . . . . . . . . . . . . . . . . . 40V
Maximum Continuous Output Current,
. . . . . . . . . . . . . . . . . . .
100mA
Each Drive
Maximum PWM Output Switching Current,
. . . . . . . . . . . . . . .
150mA
Each Drive
Thermal Resistance
JA
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
o
C/W
Power Dissipation, P
D
Up to +70
o
C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mW
Above +70
o
C . . . . . . . . . . . . . . . . . . .Derate Linearly at 10mW/
o
C
Ambient Temperature Range
Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to +85
o
C
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55
o
C to +150
o
C
Lead Temperature (During Soldering). . . . . . . . . . . . . . . . . . +265
o
C
At distance 1/16
1/32" (1.59
0.79mm) from case for
10s max
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.
Electrical Specifications
T
A
= -40
o
C to +85
o
C, V
CC
= 16V Unless Otherwise Specified
PARAMETERS
SYMBOL
MIN
TYP
MAX
UNITS
Operating Supply Voltage Range
V
CC
8
-
16
V
Supply Current (Note 1)
I
CC
-
8
20
mA
INPUT LEVELS
Logic Input, Low Voltage
V
IL
-
-
0.8
V
Logic Input, High Voltage
V
IH
3.5
-
-
V
Logic Input, Low Current, V
IL
= 0V
I
IL
-10
-
-
A
Logic Input, High Current, V
IH
= 5V
I
IH
-
-
10
A
OUTPUT: RLA = RLB = 138
Maximum Source Saturated Voltage
V
SAT
- High
-
1.2
1.75
V
Maximum Sink Saturated Voltage
V
SAT
- Low
-
0.25
0.5
V
Differential V
SAT
Voltage, Both Outputs Saturated
Diff - V
SAT
-
10
100
mV
Switching Specifications
PARAMETERS
SYMBOL
MIN
TYP
MAX
UNITS
SOURCE CURRENT (See Figure 3)
Turn-Off Delay
T
SC-OFF
-
-
2
s
Fall Time
T
SC-F
-
-
2.2
s
Turn-On Time
T
SC-ON
-
-
1
s
Rise Time
T
SC-R
-
-
0.4
s
SINK CURRENT (See Figure 4)
Turn-Off Delay
T
SK-OFF
-
-
1.6
s
Fall Time
T
SK-F
-
-
0.4
s
Turn-On Time
T
SK-ON
-
-
0.6
s
Rise Time
T
SK-R
-
-
0.2
s
NOTE:
1. No load, PWMA = PWMB = 5V, DIR A = DIR B = 0V
6-5
CA3275
FIGURE 1. CA3275 DUAL FULL BRIDGE DRIVER SCHEMATIC
FIGURE 2. QUADRATURE STEP-MOTOR APPLICATION SCHEMATIC
SHORT
CIRCUIT
PROTECTION
SHORT
CIRCUIT
PROTECTION
SHORT
CIRCUIT
PROTECTION
SHORT
CIRCUIT
PROTECTION
Q1
POWER
Q3
POWER
COIL A
COIL A+
Q2
POWER
Q4
POWER
DIRA
PWMA
SHORT
CIRCUIT
PROTECTION
SHORT
CIRCUIT
PROTECTION
SHORT
CIRCUIT
PROTECTION
SHORT
CIRCUIT
PROTECTION
Q5
POWER
Q7
POWER
COIL B
COIL B+
Q6
POWER
Q8
POWER
DIRB
PWMB
INTERNAL VOLTAGE
SUPPLY WITH
BANDGAP REFERENCE
OVERVOLTAGE PROTECTION
AND THERMAL SHUTDOWN
CIRCUITS
V
CC
V
CC
V
CC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
COIL B
COIL A
COIL A+
GND
PWMA
DIRA
GND
GND
COIL B+
V
CC
V
CC
V
CC
V
CC
PWMB
DIRB
STEP
MOTOR
LB
RB
PWMA
DIRB
DIRA
PWMB
RA
LA
6-6
CA3275
FIGURE 3. SOURCE SWITCHING TEST CIRCUIT AND VOLTAGE WAVEFORMS
FIGURE 4. SINK SWITCHING TEST CIRCUIT AND VOLTAGE WAVEFORMS
COIL
C
L
150
R
L
30pF
DUT
TEST CIRCUIT 1
PWM
DIR
V
S
C
L
INCLUDES PROBE AND TEST CAPACITANCE
COIL OUTPUT
COIL OUTPUT
DIR PULSE
50%
10%
90%
T
SC-ON
T
SC-R
T
SC-OFF
T
SC-F
T
SC-OFF
T
SC-F
T
SC-ON
T
SC-R
10%
10%
90%
90%
TEST CONDITIONS: PWM = 0V, V
S
= 16V
DIR PULSE PARAMETERS:
F = 1kHz, W = 100
s, TR = TF = 1
s, AMPL = 4V
50%
90%
10%
V
S
R
L
150
C
L
30pF
TEST CIRCUIT 2
PWM
DIR
C
L
INCLUDES PROBE AND TEST FIXTURE CAPACITANCE
50%
T
SK-ON
T
SK-R
T
SK-OFF
T
SK-F
10%
90%
PWM PULSE
COIL OUTPUT
PWM PULSE PARAMETERS:
F = 1kHz, W = 100
s, TR = TF = 1
s, AMPL = 4V
DUT
COIL
TEST CONDITIONS: V
S
= 16V
DIR = 0V WHEN TESTING COIL - OUTPUT
DIR = 4V WHEN TESTING COIL + OUTPUT
6-7
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; nor for any infringements of patents or other rights of third parties which may
result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site http://www.intersil.com
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