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EST7502B Datasheet Preview

EST7502B Datasheet

PC Power Supply PWM

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EST7502B PC Power Supply PWM with Supervisor
GENERAL DESCRIPTION
The EST7502B is a pulse–width modulation (PWM) control circuit with complete protection circuits for
used in the SMPS (Switched Mode Power Supply). It contains various functions, which are Over
Voltage Protection, Under Voltage Protection, Power Good Output (PGO), Remote On/Off control and
etc. It can minimize external components of switching power supply systems in personal computer.
Over Voltage Protection (OVP) monitors 3.3V, 5V, 12V and PT input voltage level. Under Voltage
Protection (UVP) monitors 3.3V, 5V and 12V input voltage level. Power Good Output monitors the
voltage level of power supply.
FEATURES
Complete PWM Control and Protection Circuitry
Over Voltage Protection for 3.3V / 5V / 12V / PT
Under Voltage Protection for 3.3V / 5V / 12V
280ms PG Time Delay
Power Good Output is Open Drain Output
PWM Control Output are Open Drain Output
280 ms Time Delay for UVP
Remote ON/OFF function De–bounce Time
Soft-Start function built-in
16–Pin Dual In–line Package
PIN CONFIGURATION
V33
V5
V12
PT
GND
RT
C1
C2
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
VADJ
OPNEGIN
OPOUT
VCC
DET
PG
SS
REM
ORDERING INFORMATION
ORDER NUMBER
Package
EST7502B
DIP 16
Shipping
Top Marking
www.esthome.com
1
2007-10-15 V2




EST

EST7502B Datasheet Preview

EST7502B Datasheet

PC Power Supply PWM

No Preview Available !

www.DataSheet4U.com
EST7502B PC Power Supply PWM with Supervisor
PIN DESCRIPTION
Pin No.
1 V33
2 V5
3 V12
4 PT
5 GND
6 RT
7 C1
8 C2
9 REM
Pin Name
10 SS
11 PG
12 DET
13 VCC
14 OPOUT
15 OPNEGIN
16 VADJ
TYPE
I
I
I
I
P
O
O
O
I
O
O
I
P
O
I
I
FUNCTION
OVP/UVP input FOR 3.3V.
OVP/UVP input for 5V.
OVP/UVP input for 12V.
Extra OVP protection input.
Ground.
Oscillation frequency set by external resistor.
PWM open drain output 1.
PWM open drain output 2.
Remote on/off input.
REM=”low” that means the main SMPS is turned-on.
REM=”high”, the main SMPS is turned-off.
Soft start function set by external capacitor.
Power good signal.
PG= ”high” means “power good”.
PG= ”low” means “power fail”.
Extra protection input.
Supply voltage.
OP compensation output.
OP compensation negative input.
OP compensation positive input , feedback voltage sense input.
www.esthome.com
2
2007-10-15 V2


Part Number EST7502B
Description PC Power Supply PWM
Maker EST
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EST7502B Datasheet PDF





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