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參數(shù)資料
| 型號： | CS3750 |
| 廠商： | ZF Electronics Corporation |
| 英文描述： | IC AC/DC CONVERTER DUAL SIP14 |
| 中文描述： | 100mA的雙H橋空心計驅(qū)動器 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大小： | 137K |
| 代理商： | CS3750 |
3
C
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
16L PDIP
(internally fused leads)
1
DIR1
CMOS compatible input pin controls direction of current
through OUT1
2
C1
RC filter capacitor for OUT1 connected to Ground
3
IN1
CMOS compatible input pin controls output OUT1A and 1B
4,5,12,13
Gnd
Ground connection
6
OUT1A
One half of H-bridge output stage 1
7
VS1
Supply voltage
8
OUT1B
One half of H-bridge output stage 1
9
OUT2B
One half of H-bridge output stage 2
10
VS2
Supply voltage
11
OUT2A
One half of H-bridge output stage 2
14
IN2
CMOS compatible input pin controls output OUT2A and 2B
15
C2
RC filter capacitor for OUT2 connected to Ground
16
DIR2
CMOS compatible input pin controls direction of current
through OUT2
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.
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
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.
Output Stage
Motor Direction Control
Protection
Input
INX
0
1
1
Direction
DIRX
X
0
1
Outputs
OUTxA
0
1
0
OUTxB
0
0
1
Circuit Description
Application Diagram
1
IN1
C1
Gnd
Gnd
OUT1B
VS1
DIR1
C2
Gnd
Gnd
OUT2A
VS2
C
DIR2
*C
1
COIL1
COIL2
Air Core
Gauge
Circular
Speedometer
*C
2
M
I
* 0.047
m
F
V
BAT
OUT1A
OUT2B
IN2
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