SG6105 查看數據表（PDF） - Unspecified
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SG6105 Datasheet PDF : 13 Pages
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Power Supply Supervisor + Regulator + PWM
Product Specification
SG6105
PWM switching signal in the secondary power
transformer is proportional to the AC line voltage. Adjust
the ratio of resistor divider to decide the threshold of
power-down warning. A small capacitor is connected
from UVAC to ground for filtering the switching noise.
VS
Vo
Vin
R1
R2
C1
+
0.7V
UVAC
Over Power Protection (OPP)
The OPP (over power protection) is used for
detecting over power and/or short-circuit conditions.
When OPPS voltage (p.4, Note-1) is higher than 2.1V and
this situation existed for longer than 7 msec, 6105 will
pull the PG low and lock off the power outputs.
OP1
Vdd
Negative Voltage Protection
The NVP provides an UVP (under voltage protection)
for negative voltage outputs. An under-voltage represents
the phenomenal of the overload condition in negative
voltage output. For example, the –12V output may drop
to –10V during the overload situation. A resistor
determining the threshold of the protection is connected
from pin NVP to the negative voltage output. Via this
resistor, NVP outputs a 64uA constant current to the
negative voltage output. When the NVP voltage is over
2.1V and the situation kept for longer than 7 msec, 6105
will lock the power outputs off.
VNVP = 64 uA × (R1 + R2) – V-12V
The power outputs will be locked off when VNVP ≥
2.1V.
64uA
R1
2.1V
R2
-12V
-5V
R1
R2
OP2
OPP
C1
R3
©System General Corp.
Version 2.4(IRO33.0011.B1)
- 11 -
www.sg.com.tw
Apr.7, 2004
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