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參數(shù)資料
| 型號： | UPD168001 |
| 廠商： | NEC Corp. |
| 英文描述： | MONOLITHIC 4-CHANNEL H BRIDGE + LOW-SIDE SWITCH |
| 中文描述： | 整體式4通道H橋的低邊開關(guān) |
| 文件頁數(shù)： | 7/20頁 |
| 文件大小： | 138K |
| 代理商： | UPD168001 |
Data Sheet S15728EJ1V0DS
7
μ
PD168001
(3) Low-side switch
The low-side switch of ch 5 has an output stage configured of an N-ch MOSFET. Its input is a high-level/low-level
binary signal. The truth table of the input logic is shown below.
M
V
M
V
DD
IN5
SEL
Function Table (Channel 5)
Input
Output
IN5
SEL
OUT5
L
H
Hi-Z (output off)
H
H
L (ouput on)
L
Hi-Z (output off)
(4) Power sequence
This IC has logic power supply (V
DD
) and output power supply (V
M
) pins. The power sequence of these pins must
be as follows.
Turn on V
M
with V
DD
turned on to turn on power.
To turn off power, turn off V
M
with V
DD
turned on, and then turn off V
DD
.
(However, V
DD
and V
M
can be turned off at the same time.)
Cautions 1. Because this IC switches a high current at high speeds, surge may be generated by V
M
, GND
wiring, and inductance, degrading the IC.
On the PWB, widen and shorten the pattern width of the GND lines as much as possible, and
locate bypass capacitors between V
M
and GND as close to the IC as possible. Connect two
capacitors in parallel: a magnetic capacitor with a low inductance (4700 pF or more) and an
electrolytic capacitor of 10
μ
F or more, depending on the load current.
2. When a load such as a DC motor is connected to ch 5 and the switch is turned OFF, a counter
electromotive force is generated. If the absolute maximum rating of the output pin voltage may
be exceeded by the voltage applied to the load, be sure to connect a Schottky barrier diode to
both the ends of the load to prevent the rating of the output pin voltage from being exceeded.
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