STK740-470 查看數據表（PDF） - SANYO -> Panasonic
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STK740-470 Datasheet PDF : 10 Pages
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Test Circuit
STK740-470
12 11 10 9 8 7 6 5 4 3 2 1
DC
INPUT
C1
L1
FB
C2
ON/OFF
Vo adjust
OUTPUT
(5V)
GND
C1 : 47µF/25V (OS capacitor)
C2 : 1000µF/16V×2
L1 : 30µH
FB : Ferrite-bead core
GND
Overvoltage Protection Circuit
In a constant-voltage power supply circuit output voltage may generally exceed the stipulated rating (equivalent to input
voltage) when the circuit is broken down or the IC and the printed circuit board is wrongly soldered. Therefore overvoltage
protection circuit is recommended to use to minimize the damages caused by the overvoltage.
Sample the overvoltage protection circuit
DC
INPUT
FUSE
Regulator
OUTPUT
SCR
GND
CR
GND
No.6107–4/10
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