STC6105 Datasheet, PDF (2/10 Pages) Suntac Electronic Corp. – Power Supply Supervisor + Regulator + PWM

STC6105 Power Supply Supervisor + Regulator + PWM
ORDERING INFORMATION
Part Number
Package
STC6105
20-Pin DIP
Product Specification
PIN DESCRIPTIONS
Name Pin Type
VCC
20 Supply
PG
10 Logic output
V33
2
Analog input
V5
3
Analog input
V12
7
Analog input
OPP
4
Analog input
PSON
1
Logic input
NVP
UVAC
COMP
IN
SS
6
Analog input
5
Analog input
16 Analog output
17 Analog input
18 Analog input
OP1/OP2 9/8 Analog output
FB1
VREF1
FB2
VREF2
RI
GND
14 Analog output
13 Analog input
11 Analog output
12 Analog input
Program.
19
Analog input
15 Supply
Function
Supply voltage. 4.5V ~ 5.5V. It is connected to 5V-standby.
Power Good logic output, 0 or 1 (open-collector). PG = 1 means that the power is good for operation.
The PG delay is 300 msec.
3.3V over-voltage/under-voltage control sense input.
5V over-voltage/under-voltage control sense input.
12V over-voltage/under-voltage control sense input.
Over-power sense input. This pin is connected to driver transformer or the output of current
transformer. When not in use, this pin should be grounded.
Remote On/Off logic input forʳCPU or controller. Turn on/off the PWM Output after the 7.5 msec / 26
msec delay.
PSON = 0 means that the main SMPS is operational.
PSON =1 means that the main SMPS is off and the latch is reset.
The protection input for negative output, such as –12V and/or –5V. Trip voltage = 2.1V.
AC fail detection, detect main AC voltage under-voltage and/or failure.
Error amplifier output and the input of the PWM comparator.
The negative input of error amplifier. The positive input of error amplifier is a 2.5V reference voltage.
The soft-start. It is settable through external capacitor. The current source output at this pin is 8uA and
the voltage is clamped at 2.5V.
The totem-pole output drivers of push-pull PWM. The output are enabled (low) only when the NAND
gate inputs are high, the maximum duty cycle on an output (OP1 or OP2) is 46%.
Output for first converter regulation loop.
Reference comparison input for first converter regulation loop. 2.5V.
Output for second converter regulation loop.
Reference comparison input for second converter regulation loop. 2.5V.
Connected to external resistor for the reference setting.
RI = 75k ohms.
Ground.
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