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SUPPLY SUPERVISOR. S3525 Datasheet

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SUPPLY SUPERVISOR. S3525 Datasheet






S3525 SUPERVISOR. Datasheet pdf. Equivalent




S3525 SUPERVISOR. Datasheet pdf. Equivalent





Part

S3525

Description

PC POWER SUPPLY SUPERVISOR



Feature


UNISONIC TECHNOLOGIES CO., LTD S3525 PC POWER SUPPLY SUPERVISOR „ DESCRIPTION The UTC S3525 is specially designed fo r switching power supply system. it pro vides protection circuits, power good o utput (PGO) indicator, fault protection output (FPOB) and a PSONB control. The protection circuits include over volta ge protection (OVP), under voltage prot ection (UVP) and ov.
Manufacture

Unisonic Technologies

Datasheet
Download S3525 Datasheet


Unisonic Technologies S3525

S3525; er current protection (OCP) monitoring f or system voltages and currents. When 3 .3V, 5V or 12V voltage is decreasing to 2.68V, 4.3V and 9.9V respectively, the under voltage protection (UVP) functio n will be enabled. FPOB will be set to high to turn off the PWM controller IC. Toggling the PSONB from low to high wi ll reset the fault protection latch. Th e voltage differen.


Unisonic Technologies S3525

ce across external current shunt is used for OCP functions. An external resisto r can be used to adjust protection thre shold. The power supply is turned on af ter 38mS delay time when PSONB signal i s set from high to low. To turn off pow er supply, PSONB signal is set from low to high with the delay time 38mS. The PGI circuitry provides a power-down war ning signal for PG.


Unisonic Technologies S3525

O. When PGI input is lower than the inte rnal 1.20V reference voltage, PGO signa l is pulled low. „ FEATURES * OVP/UVP monitors 3.3V, 5V, 12V input voltage le vel. * OCP monitors IS33, IS5, IS12 inp ut current sense. * Fault protection ou tput (FPOB) with Open Drain Output stag e. * Power good output (PGO) with Open Drain Output stage. * 38ms de-bounce ti me for PSONB input .

Part

S3525

Description

PC POWER SUPPLY SUPERVISOR



Feature


UNISONIC TECHNOLOGIES CO., LTD S3525 PC POWER SUPPLY SUPERVISOR „ DESCRIPTION The UTC S3525 is specially designed fo r switching power supply system. it pro vides protection circuits, power good o utput (PGO) indicator, fault protection output (FPOB) and a PSONB control. The protection circuits include over volta ge protection (OVP), under voltage prot ection (UVP) and ov.
Manufacture

Unisonic Technologies

Datasheet
Download S3525 Datasheet




 S3525
UNISONIC TECHNOLOGIES CO., LTD
S3525
PC POWER SUPPLY
SUPERVISOR
„ DESCRIPTION
The UTC S3525 is specially designed for switching power supply
system. it provides protection circuits, power good output (PGO)
indicator, fault protection output (FPOB) and a PSONB control.
The protection circuits include over voltage protection (OVP),
under voltage protection (UVP) and over current protection (OCP)
monitoring for system voltages and currents.
When 3.3V, 5V or 12V voltage is decreasing to 2.68V, 4.3V and
9.9V respectively, the under voltage protection (UVP) function will be
enabled. FPOB will be set to high to turn off the PWM controller IC.
Toggling the PSONB from low to high will reset the fault protection
latch.
The voltage difference across external current shunt is used for
OCP functions. An external resistor can be used to adjust protection
threshold.
The power supply is turned on after 38mS delay time when
PSONB signal is set from high to low. To turn off power supply,
PSONB signal is set from low to high with the delay time 38mS. The
PGI circuitry provides a power-down warning signal for PGO. When
PGI input is lower than the internal 1.20V reference voltage, PGO
signal is pulled low.
„ FEATURES
* OVP/UVP monitors 3.3V, 5V, 12V input voltage level.
* OCP monitors IS33, IS5, IS12 input current sense.
* Fault protection output (FPOB) with Open Drain Output stage.
* Power good output (PGO) with Open Drain Output stage.
* 38ms de-bounce time for PSONB input signal.
* 300ms time delay from PGI to PGO.
* 2.4ms time delay for PSONB to turn off FPOB.
„ ORDERING INFORMATION
Ordering Number
Lead Free Plating
Halogen Free
S3525L-D14-T
S3525G-D14-T
S3525L-S14-R
S3525G-S14-R
S3525L-S14-T
S3525G-S14-T
Package
DIP-14
SOP-14
SOP-14
CMOS IC
Packing
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
1 of 9
QW-R502-105.B




 S3525
S3525
„ PIN ASSIGNMENT
CMOS IC
„ FUNCTION DESCRIPTION
PGI
PSONB
UV&OC Protection OV Protection
PGI<1.2V
L
No No
PGI<1.2V
L
No Yes
PGI<1.2V
L
Yes No
PGI<1.2V
L
Yes Yes
PGI>1.2V
L
No No
PGI>1.2V
L
No Yes
PGI>1.2V
L
Yes No
PGI>1.2V
L
Yes Yes
XHXX
Note: FPOB=L means: fault is not latched. FPOB=H means: fault is latched
PGO=L means: fault. PGO=H means: No fault
X=do not care
FPOB
L
H
L
H
L
H
H
H
H
PGO
L
L
L
L
H
L
L
L
L
„ PIN DESCRIPTIONS
PIN NO.
1
2
3
PIN NAME
PGI
GND
FPOB
4 PSONB
5 IS12AB
6 RI
7 V12B
8 IS5
9 IS33
10 V12A
11 V33
12 V5
13 VDD
14 PGO
TYPE
Input
Supply
Output
Input
Input
Input
Input
Input
Input
Input
Input
Input
Supply
Output
DESCRIPTION
Power Good Input. For ATX SMPS, it detects AC line voltage through the
main transformer.
Ground
Fault Protection Output. Output signal to control the primary PWM IC through
an opto-coupler. When FPOB is low, the PWM IC is enabled.
Remote On/Off logic input from CPU or main-board. The power supply will
be turned on/off after 38mS delay.
12V AB over current protection.
Reference setting. One external resistor Ri connected between RI and GND
pin will determine a reference current, IREF = 1.20/Ri, for OCP programming.
12V over/under voltage protection.
5V over current protection.
3.3V over current protection
12V over/under voltage protection.
3.3V over/under voltage protection
5V over/under voltage protection.
Power supply.
Power good logic output, 0 or 1(open-drain). Power good=1 means that the
power supply is good for operation. The power good delay is 300mS.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 9
QW-R502-105.B




 S3525
S3525
„ BLOCK DIAGRAM
PGI
Bandgap
Reference
VREF=1.2V
IS33
VS33
IS12AB
VS12A
VS12B
IS5
VS5
+- UN
V12A
+
-
IREF*8
+
-OV
+-UN
V12A
+
-
IREF*8
+
-OV
+-UN
V12A
+
-
+
-OV
+-UN
V12A
+
-
IREF*8
+
-OV
+-UN
CMOS IC
73 μs
debounce
225ms
clr
delay
V cc
PGO
73 μs
debounce
RQ
SQ
FPOB
Power On Reset
Internal
PWR Power
VCCI=3.6V
2.4ms
delay
38 ms
debounce
PSONB
75ms/ 300ms
delay
PWR
OSC
CLK
V12A
VREF=1.2V
+
-
RI
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 9
QW-R502-105.B



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