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參數(shù)資料
| 型號： | UPD168113 |
| 廠商： | NEC Corp. |
| 英文描述： | MOS INTEGRATED CIRCUIT |
| 中文描述： | 馬鞍山集成電路 |
| 文件頁數(shù)： | 44/50頁 |
| 文件大?。?/td> | 771K |
| 代理商： | UPD168113 |
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Data Sheet S16423EJ2V0DS
44
μ
PD168113
13. FUNCTION OPERATION TABLE
The table below shows the input/output logic when ch5 to ch7 are set in the external control mode by initialization.
With ch7, an H-bridge current can be controlled by an external resistor for constant-current driving (output chopping
operation by PWM driving).
The external control mode is invalid immediately after reset and before an address is set.
Therefore, address setting is necessary even when the external control mode is used.
13.1
Serial Setting Contents of ch5 and ch6
Even when the external control mode is selected, the contents of the set output duty factor of ch5 (address 5) and
ch6 (address 6) are reflected. As the output duty factor of the output stage, therefore, the logical product of an
external control signal and the serial command setting is output. For the setting method by a command, refer to
11.5
Address 5 and Address 6
.
13.2 Setting of ch7
ch7 is used for constant-current driving with a resistor connected to the FB pin. The current that serves as a
reference is set by a serial command. Therefore, set the current of ch7 (address 7) even when the external control
mode is selected.
For the setting method by a command, refer to
11.4 Address 3, Address 4, and Address 7
.
Figure 13
1. Truth Table of ch5 to ch7
Input
Output
Current Direction
IN
A
IN
B
RESETB
OUT
A
OUT
B
L
L
H
Hi-Z
Hi-Z
Stop (stop)
H
L
H
H
L
OUT
A
→
OUT
B
(forward)
L
H
H
L
H
OUT
B
→
OUT
A
(reverse)
H
H
H
H
H
Brake (regenerative mode)
x
x
L
Hi-Z
Hi-Z
All output stop
Remark
x: Don't care
LOAD
ON
V
M
A
B
OFF
OFF
ON
GND
Forward
LOAD
OFF
V
M
A
B
ON
ON
OFF
GND
Reverse
LOAD
OFF
V
M
A
B
OFF
OFF
OFF
GND
Stop
LOAD
ON
V
M
A
B
ON
OFF
OFF
GND
Brake
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