參數(shù)資料
型號: PQ1CZ38M2Z
文件頁數(shù): 7/8頁
文件大小: 74K
代理商: PQ1CZ38M2Z
Chopper Regulators
PQ1CZ1
I
ON/OFF Control Terminal
In the following circuit,when ON/OFF control terminal
t
becomes low by switching transistor Tr on, output voltage may
be turned OFF and the device becomes stand-by mode. Dissipation current at stand-by mode becomes Max.400
μ
A.
<Soft start>
When capacitor Cs is attached, output pulse gradually expanded and output voltage will start softly.
<ON/OFF control with soft startup>
For ON/OFF control with capacitor C
S
, be careful not to destroy a transistor Tr by discharge current from C
S
, adding a
resistor restricting discharge current of C
S
.
(V)
3.55
(V
THH
)
2.25
(V
THL
)
1.4
(V
THON
)
0
Stand-by mode
1
OFF-state
2
Soft start
3
time
Duty 0%
Duty D
MAX
Step Down Voltage Circuit
O
1
2
3
+
V
IN
C
IN
C
S
C
O
V
O
R
2
R
1
Load
D
1
2
4
3
5
L
I
O
+
T
r
ON/OFF control signal
In the external area of the safety operation area shown by the derating curve, the overheat protection circuit may operate to
shut-down output. However, please avoid keeping such condition for a long time.
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