CS3750.pdf 데이터시트 (총 4 페이지) - 파일 다운로드 CS3750 데이타시트 다운로드

No Preview Available !

CS3750
100mA Dual H-Bridge Air-Core
Gauge Driver
Description
Features
The CS3750 is a dual H-bridge four
quadrant air-core gauge driver. The IC
provides all the functions necessary to
drive a tachometer or speedometer as
part of a microprocessor based multi-
plexed system. Digital input control
eliminates the need for any analog cali-
bration of the gauge.
The controlling microprocessor sends
out a PWM signal to each H bridge
driver input (IN1, IN2). The PWM sig-
nal duty cycle is proportional to the
HÐbridge output. Output current
(100mA max) direction is controlled by
the DIRECTION input. PWM switch-
ing noise is minimized at each half
bridge by an internal RC filter and
external programmable capacitor.
The CS3750 is protected against 50V
load dump, over voltage and thermal
runaway fault conditions. Any of these
faults causes the IC to shut down. Each
high side of the output driver is current
limited. A short circuit condition in one
driver does not affect the others.
Absolute Maximum Ratings
Supply Voltage .................................................................................7.5V to +16V
Internal Power Dissipation.....................................................Internally limited
Logic Input Voltages .......................................................................Ð0.3V to 6.5V
Junction Temperature Range ...................................................Ð40¡C to +150¡C
Storage Temperature Range .....................................................Ð55¡C to +165¡C
Lead Temperature Soldering
Wave Solder (through hole styles only) ...........10 sec. max, 260¡C peak
Electrostatic Discharge (Human Body Model)............................................8kV
s 2 Independent NPN
H-Bridge Drivers
s No Analog Trim Required
s Used in Multiplexed
Systems
s Quiet Gauge Operation
s Programmable Slew
Rate Minimizes
Switching Noise
s Fault Protection
Over Voltage
Thermal Shutdown
Short Circuit
Package Options
Block Diagram
OUT1A
OUT1B C1 OUT2A
OUT2B C2
1/2 H -Bridge
Driver
with Current
Limit
1/2 H -Bridge
Driver
with Current
Limit
1/2 H- Bridge
Driver
with Current
Limit
1/2 H- Bridge
Driver
with Current
Limit
DIRECTION
Control
Overvoltage
RC Filter
for PWM Input
Thermal
Shutdown
VREF
DIRECTION
Control
RC Filter
for PWM Input
Gnd
16 Lead PDIP
(internally fused leads)
DIR1 1
C1
IN1
Gnd
Gnd
OUT1A
VS1
OUT1B
DIR2
C2
IN2
Gnd
Gnd
OUT2A
VS2
OUT2B
VS1,2
DIR1
IN1
DIR2
IN2
Rev. 7/20/95
1
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
A Company
¨

No Preview Available !

Electrical Characteristics: 7.5V <= VCC<=15V; -40¡C ² TA ² +85¡C unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
s Output Stage
VOUT Saturation Voltage
(Low Side)
VOUT Offset Voltage
VOUT Saturation High Side
Low Side
VOUT Differential
Matching Voltage
Supply Current
IOUT=100mA; VIN=0V
IOUT=1mA; VIN=0V
VC=5V; IOUT=-30mA
VIN=5V;IOUT=-100mA
VIN=0V;IOUT=-1mA
VC=5V, IOUT=-100mA
VIN=VDIR=0;
VS-2
0.25
0.01
15
VS-1.5
0.02
23
0.50
0.10
50
VS
0.10
100
45
s Input Stage
VIN LOW
HIGH
Hysteresis
IIN LOW
HIGH
Output Slew Rate
with respect to input
Output Turn on Delay
with respect to input
Output Turn off Delay
with respect to input
VIN decreasing; VDIR=0V
VIN increasing; VDIR=0V
VDIR=0V
VIN=0.8V; VDIR=0V
VIN=3.5V
VIN=250Hz; RLOAD=150½
VIN=250Hz; RLOAD=150½, note 1
VIN=250Hz; RLOAD=150½, note 2
0.8
1.9
2.0
100
20
0.4
0.2
1.5
2.4
3.5
100
100.0
0.8
6
9
s Direction
VDIR LOW
HIGH
Hysteresis
IDIR LOW
HIGH
Output Slew Rate
with respect to DIR
Output Fall Time
with respect to DIR
Output Turn on Delay
with respect to DIR
Output Turn off Delay
with respect to DIR
s Protection Functions
IOUT Current Limit
(High Side Only)
Over Voltage Threshold
Hysteresis
Thermal Shutdown
Hysteresis
VIN=5V; VDIR decreasing
VIN=5V; VDIR increasing
VIN=5V
VIN=0V; VDIR=0.8V
VIN=0V; VDIR=3.5V
VIN=5V; fDIR=250Hz; C=0µF
VIN=0V; VDIR=0V; C=0µF
VIN=5V; RLOAD=150½
VDIR=250Hz; C=0µF, note 1
VIN=5V; RLOAD=150½
VDIR=250Hz; C=0µF, note 2
VIN=5V
VIN=5V
0.8 1.9
2.0
100
40
0.4
0.2 1.5
0.2
1
2.5
100 225
17.0 21.5
0.5
160
20
3.5
100
100
2.0
6
9
26.0
Note 1: Time required for output signal to rise to 90% of its amplitude after input signal switches.
Note 2: Time required for output signal to decrease to 10% of its amplitude after input signal switches.
2
UNIT
V
V
mV
V
V
mV
mA
V
V
mV
µA
µA
V/us
µs
µs
V
V
mV
µA
µA
V/µs
µs
µs
µs
mA
V
V
¡C
¡C

No Preview Available !

Package Pin Description
PACKAGE PIN #
PIN SYMBOL
16L PDIP (internally fused leads)
1 DIR1
2
3
4,5,12,13
6
7
8
9
10
11
14
15
16
C1
IN1
Gnd
OUT1A
VS1
OUT1B
OUT2B
VS2
OUT2A
IN2
C2
DIR2
FUNCTION
CMOS compatible input pin controls direction of current
through OUT1
RC filter capacitor for OUT1 connected to Ground
CMOS compatible input pin controls output OUT1A and 1B
Ground connection
One half of H-bridge output stage 1
Supply voltage
One half of H-bridge output stage 1
One half of H-bridge output stage 2
Supply voltage
One half of H-bridge output stage 2
CMOS compatible input pin controls output OUT2A and 2B
RC filter capacitor for OUT2 connected to Ground
CMOS compatible input pin controls direction of current
through OUT2
Circuit Description
Output Stage
Each output stage contains 4 power NPN transistors
arranged in a traditional H bridge configuration. Current
flow through the two outputs (OUTxA, OUTxB) in each
H-bridge is controlled by the logic signal DIRx.
PWM input signals from the microprocessor, are filtered
on chip and sent to the output stage. The duty cycle of the
PWM signal is proportional to output voltage. The RC fil-
ter reduces the noise of the PWM input signal by slowing
its slew rate: i.e., the output signal is converted from a
square wave to an exponential sawtooth waveform. An
external capacitor (Cx) controls the slew rate for each H
bridge.
Protection
The high side driver transistor in each H-bridge is current
limited as a protection against a short circuit fault condi-
tion. If an over voltage or a thermal runaway fault condi-
tions occurs, all outputs shut down.
Application Diagram
VBAT
Motor Direction Control
When the voltage on the control pin (INx) is low, both
halves of the H bridge are off (Table 1). When INx is high,
DIR controls the flow of current through the H-bridge. If
DIRx=0, current flows from OUTxA out to the coil and
back in through OUTxB. If DIRx=1, current flows from
OUTxB out to the coil and back in through OUTxA.
Table 1. Logic Control of H-Bridge
Input
INX
0
1
1
Direction
Outputs
DIRX OUTxA OUTxB
X00
0 10
1 01
1 DIR1
DIR2
C1 C2
*C1
IN1 IN2
Gnd Gnd
Gnd Gnd
OUT1A OUT2A
VS1 VS2
OUT1B OUT2B
*C2
* 0.047mF
COIL1
COIL2
Air Core
Gauge
Circular
Speedometer
3

No Preview Available !

Package Specification
PACKAGE DIMENSIONS IN mm (INCHES)
PACKAGE THERMAL DATA
Lead Count
16L PDIP
(internally fused leads)
D
Metric
English
Max Min Max Min
19.69 18.67 .775 .735
Thermal Data
RQJC
RQJA
typ
typ
16L PDIP
(internally fused leads)
15
50
ûC/W
ûC/W
Plastic DIP (N); 300 mil wide
7.11 (.280)
6.10 (.240)
3.68 (.145)
2.92 (.115)
8.26 (.325)
7.62 (.300)
1.77 (.070)
1.14 (.045)
2.54 (.100) BSC
.356 (.014)
.203 (.008)
REF: JEDEC MS-001
0.39 (.015)
MIN.
.558 (.022)
.356 (.014)
D
Some 8 and 16 lead
packages may have
1/2 lead at the end
of the package.
All specs are the same.
Ordering Information
Part Number
CS3750ENF16
Description
16L PDIP (internally fused leads)
Rev. 7/20/95
Cherry Semiconductor Corporation reserves the
right to make changes to the specifications without
notice. Please contact Cherry Semiconductor
Corporation for the latest available information.
4 © 1999 Cherry Semiconductor Corporation