DATASHEET

CA3275
Dual Full Bridge Driver
April 1994
Features
Description
• Two Full Bridge Drivers
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, where the coils would be driven at frequencies ranging from 200Hz to 400Hz. The coils are wrapped at 90o
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.
• ± 150mA Maximum Current
• Logic Controlled Switching
• Direction Control
• PWM IOUT 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
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.
• Speedometer Displays
• Tachometer Displays
Ordering Information
• Stepper Motors
• Slave Position Indicators
PART NO.
CA3275E
Pinout
TEMPERATURE
-40oC
to
+85oC
PACKAGE
14 Lead Plastic DIP
Block Diagram
CA3275 (PDIP)
TOP VIEW
COIL A- 1
14 COIL A+
VCC
2
13 GND
VCC
3
12 PWMA
PWMB 4
11 DIR A
DIR B 5
10 GND
6
9 GND
VCC
COIL B- 7
LA
SENSOR &
CONVERTER
A/D, V/F, ETC
MICROPROCESSOR
PHASE, DIRECTION
& PWM CONTROL
SIN
CA3275
DUAL-H
DRIVER
ROTOR
LB
COS
8 COIL B+
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
Thermal Resistance
θJA
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100oC/W
Power Dissipation, PD
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
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
TA = -40oC to +85oC, VCC = 16V Unless Otherwise Specified
PARAMETERS
SYMBOL
MIN
TYP
MAX
UNITS
Operating Supply Voltage Range
VCC
8
-
16
V
Supply Current (Note 1)
ICC
-
8
20
mA
Logic Input, Low Voltage
VIL
-
-
0.8
V
Logic Input, High Voltage
VIH
3.5
-
-
V
Logic Input, Low Current, VIL = 0V
IIL
-10
-
-
µA
Logic Input, High Current, VIH = 5V
IIH
-
-
10
µA
Maximum Source Saturated Voltage
VSAT - High
-
1.2
1.75
V
Maximum Sink Saturated Voltage
VSAT - Low
-
0.25
0.5
V
Differential VSAT Voltage, Both Outputs Saturated
Diff - VSAT
-
10
100
mV
SYMBOL
MIN
TYP
MAX
UNITS
TSC-OFF
-
-
2
µs
TSC-F
-
-
2.2
µs
TSC-ON
-
-
1
µs
TSC-R
-
-
0.4
µs
TSK-OFF
-
-
1.6
µs
TSK-F
-
-
0.4
µs
TSK-ON
-
-
0.6
µs
TSK-R
-
-
0.2
µs
INPUT LEVELS
OUTPUT: RLA = RLB = 138Ω
Switching Specifications
PARAMETERS
SOURCE CURRENT (See Figure 3)
Turn-Off Delay
Fall Time
Turn-On Time
Rise Time
SINK CURRENT (See Figure 4)
Turn-Off Delay
Fall Time
Turn-On Time
Rise Time
NOTE:
1. No load, PWMA = PWMB = 5V, DIR A = DIR B = 0V
6-4
CA3275
VCC
SHORT
CIRCUIT
PROTECTION
SHORT
CIRCUIT
PROTECTION
Q1
POWER
Q3
POWER
DIRA
COIL A–
Q2
POWER
PWMA
COIL A+
Q4
POWER
VCC
SHORT
CIRCUIT
PROTECTION
SHORT
CIRCUIT
PROTECTION
INTERNAL VOLTAGE
SUPPLY WITH
BANDGAP REFERENCE
OVERVOLTAGE PROTECTION
AND THERMAL SHUTDOWN
CIRCUITS
VCC
SHORT
CIRCUIT
PROTECTION
SHORT
CIRCUIT
PROTECTION
Q5
POWER
Q7
POWER
DIRB
COIL B–
Q6
POWER
PWMB
SHORT
CIRCUIT
PROTECTION
COIL B+
Q8
POWER
SHORT
CIRCUIT
PROTECTION
FIGURE 1. CA3275 DUAL FULL BRIDGE DRIVER SCHEMATIC
VCC
COIL A–
VCC
COIL A+
1
14
2
13
3
12
4
11
5
10
6
9
7
8
VCC
PWMB
PWMB
DIRB
DIRB
VCC
COIL B–
RA
GND
PWMA
DIRA
LA
STEP
MOTOR
GND
GND
COIL B+
LB
DIRA
PWMA
FIGURE 2. QUADRATURE STEP-MOTOR APPLICATION SCHEMATIC
6-5
RB
CA3275
VS
DIR
COIL
DUT
RL
150
PWM
CL
CL INCLUDES PROBE AND TEST CAPACITANCE
30pF
50%
DIR PULSE
50%
TEST CIRCUIT 1
90%
90%
COIL OUTPUT
TEST CONDITIONS: PWM = 0V, VS = 16V
DIR PULSE PARAMETERS:
F = 1kHz, W = 100µs, TR = TF = 1µs, AMPL = 4V
10%
10%
TSC-ON
TSC-R
TSC-OFF
TSC-F
TSC-OFF
TSC-F
TSC-ON
TSC-R
90%
90%
COIL OUTPUT
10%
10%
FIGURE 3. SOURCE SWITCHING TEST CIRCUIT AND VOLTAGE WAVEFORMS
TEST CONDITIONS: VS = 16V
DIR = 0V WHEN TESTING COIL - OUTPUT
DIR = 4V WHEN TESTING COIL + OUTPUT
VS
RL
150
DIR
COIL
DUT
CL
CL INCLUDES PROBE AND TEST FIXTURE CAPACITANCE
30pF
PWM
TEST CIRCUIT 2
PWM PULSE
50%
PWM PULSE PARAMETERS:
F = 1kHz, W = 100µs, TR = TF = 1µs, AMPL = 4V
TSK-ON
TSK-R
TSK-OFF
TSK-F
10%
COIL OUTPUT
90%
FIGURE 4. SINK SWITCHING TEST CIRCUIT AND VOLTAGE WAVEFORMS
6-6
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 reliable. 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
6-7
Similar pages