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SC6105 Datasheet(PDF) 5 Page - Silan Microelectronics Joint-stock

Part No. SC6105
Description  VOLTAGE MODE PWM POWER SUPPLY WITH BUILTIN PROTECTION AND REGULATION
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Maker  SILAN [Silan Microelectronics Joint-stock]
Homepage  http://www.silan.com.cn
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SC6105 Datasheet(HTML) 5 Page - Silan Microelectronics Joint-stock

   
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SC6105
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
REV:1.4
2008.04.17
Http://www.silan.com.cn
Page 5 of 9
(Continued)
Pin No.
Pin Name
Description
8
OP2
The totem-pole output drivers of push-pull PWM. The maximum duty cycle on an
output (OP1 or OP2) is 46%.
9
OP1
The totem-pole output drivers of push-pull PWM.
10
PG
Power Good logic output, 0 or 1 (open-collector). PG=1 means that the power is
good for operation.
11
FB2
Output for second converter regulation loop.
12
VREF2
Reference comparison input for second converter regulation loop. 2.5V.
13
VREF1
Reference comparison input for first converter regulation loop. 2.5V.
14
FB1
Output for first converter regulation loop.
15
GND
Ground.
16
COMP
Error amplifier output and the input of the PWM comparator.
17
IN
The negative input of error amplifier. The positive input of error amplifier is a 2.5V
reference voltage.
18
SS
The soft-start. It is settable through external capacitor. The current source output at
this pin is 5.7uA and the voltage is clamped at 2.5V.
19
RI
Connected to external resistor for the reference setting.
20
VCC
Supply voltage. It is connected to 5V-standby.
FUNCTION DESCRIPTION
SC6105 have functions below: AC Power-down Detection, Over Power Protection (OPP), Negative Voltage
Protection, Over-voltage and under-voltage protection, Power-down warning for power good signal, Power good
signal and power-fail lockup, Remote on/off control, Complete pulse width modulation (PWM) control circuitry,
On-chip oscillator, Programmable Soft-Start and so on.
TIMING DIAGRAM


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