SG6105D ETC, SG6105D Datasheet

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SG6105D

Manufacturer Part Number
SG6105D
Description
Manufacturer
ETC
Datasheet

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Power Supply Supervisor + Regulator + PWM
FEATURES
APPLICATIONS
as:
ATX
MARKING DIAGRAMS
©System General Corp.
Version 2.3(IRO33.0011.B0)
PC half-bridge (or 494) power supply supervisor +
two 431 + PWM
High integration & few external components
Over-voltage protection for 3.3V, 5V and 12V
Under-voltage protection for 3.3V, 5V and 12V
Under-voltage protection for –12V and/or –5V
Over-power and short-circuit protection
Power-down warning circuitry
Power good circuitry
Delay time for PSON and PG signal
Remote ON/OFF function
On-chip oscillator and error amplifier
Two shunt regulator for 3.3V and 5V-Standby
Latching PWM for cycle-by-cycle switching
Push-pull PWM operation and totem pole outputs
Soft-start and maximum 93% duty cycle
Switching mode power supply for Computers, such
20
1
T: D = DIP
XXXXXXX: Wafer Lot
YY: Year; WW: Week
V: Assembly Location
XXXXXXXYYWWV
NLX
SG6105T
SFX (micro-ATX)
- 1 -
DESCRIPTION
power supply for desktop PCs. It provides all the
functions necessary to monitor and control the output of
the power supply. Remote ON/OFF control, power good
circuitry, some protection features against over-voltage
and over-power are implemented. It directly senses all the
output rails for OVP without the need of external dividers.
An innovated AC-signal sampling circuitry provides a
sufficient power-down warning signal for PG. A built-in
timer generates accuracy timing for control circuit
including the PS-off delay. The cycle-by-cycle PWM
switching prevents the power transformer from the
saturation and ensures the fastest response for the
short-circuit protection which greatly reduce the stress for
power transistors. Two internal precision TL431 shunt
regulators provide stable reference voltage and driver for
3.3V and 5V-standby regulation. Utilizing minimum
number of external components, the SG6105 includes all
of the functions for push-pull and/or half-bridge topology,
decreasing the production cost and PCB space, and
increasing the MTBF for power supply.
PIN CONFIGURATION
SG6105 controller is designed for switching mode
PSON
OPP
UVAC
NVP
OP2
OP1
V33
V5
V12
PG
1
10
2
3
5
6
7
8
9
4
19
18
17
16
15
14
13
12
11
20
Product Specification
RI
IN
FB1
FB2
VCC
SS
COMP
GND
VREF1
VREF2
www.sg.com.tw
June 19, 2003
SG6105

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SG6105D Summary of contents

Page 1

Power Supply Supervisor + Regulator + PWM FEATURES PC half-bridge (or 494) power supply supervisor + two 431 + PWM High integration & few external components Over-voltage protection for 3.3V, 5V and 12V Under-voltage protection for 3.3V, 5V and 12V ...

Page 2

... Power Supply Supervisor + Regulator + PWM ORDERING INFORMATION Part Number Package SG6105D 20-Pin DIP 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 6 Analog input ...

Page 3

Power Supply Supervisor + Regulator + PWM BLOCK DIAGRAM V5 V33 V12 Detector OV Protector UV Protector COMP _ 5V 3.2V + 64uA COMP _ 2.1V Delay 7msec NVP 6 + Buffer COMP _ 2.4V 4 ...

Page 4

Power Supply Supervisor + Regulator + PWM TIMING DIAGRAM VCC PSON 3.3V,5V,12V t PSON(ON) NVP SS(on/off VCC PSON UVAC OPP SS(on/off) PG ©System General Corp. Version 2.3(IRO33.0011.B0) t PSON(OFF) t PSOFF Voltage < V UVAC - 4 ...

Page 5

Power Supply Supervisor + Regulator + PWM ABSOLUTE MAXIMUM RATINGS Symbol Parameter V DC Supply Voltage at Pin Shunt Regulator Output at Fb1, Fb2 Pins FB I Output Current at PG, Fb1, Fb2 Pins OUT P Power ...

Page 6

Power Supply Supervisor + Regulator + PWM Shunt Regulator (FB1, VREF1, FB2, VREF2) Symbol Parameter V Reference Voltage REF *2 V Deviation of V Over Load Current DEV, I REF * 2 V Deviation of V Over Temperature DEV, T ...

Page 7

Power Supply Supervisor + Regulator + PWM Comparator Section Symbol Parameter DC Duty Cycle PWM Output Section (OP1, OP2) Symbol Parameter V Output Voltage Low OL V Output Voltage High OH R Output Impedance ©System General ...

Page 8

Power Supply Supervisor + Regulator + PWM APPLICATION 1 MAIN Transformer 3.3V 5Vsb STBY Transformer + Vdd ©System General Corp. Version 2.3(IRO33.0011.B0 UVAC V33 V5 V12 VCC VREF2 PG FB2 PSON VREF1 NVP FB1 OP1 RI ...

Page 9

Power Supply Supervisor + Regulator + PWM APPLICATION 2 C45 R64 GND SEN NC VDD C78 4 3 R68 D31 R70 U5 R76 FB1 VREF1 R83 R86 C56 R87 U6 1 PSON PSON 2 3.3V ...

Page 10

Power Supply Supervisor + Regulator + PWM Example of Using SG6105 for the ATX Power Supply Protection against over-voltage, short-circuit and fault conditions is mandatory in PC power supplies. These protection circuits can be realized by using many discrete components ...

Page 11

Power Supply Supervisor + Regulator + PWM 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 ...

Page 12

Power Supply Supervisor + Regulator + PWM MECHANICAL DIMENSIONS 20 PINS – DIP ( Dimension Millimeter Symbol Min 0.381 A2 3.175 24.892 E E1 6.223 e L 2.921 e 8.509 B ...

Page 13

Power Supply Supervisor + Regulator + PWM LIFE SUPPORT System General’s products are not designed to be used as components in devices intended to support or sustain human life. Use of System General’s products in components intended for surgical implant ...

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