SG6105 ETC, SG6105 Datasheet

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SG6105

Manufacturer Part Number
SG6105
Description
Power Supply Supervisor + Regulator + PWM
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

Related parts for SG6105

SG6105 Summary of contents

Page 1

... 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 ...

Page 2

... 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 75k ohms. Ground Product Specification SG6105 www.sg.com.tw June 19, 2003 ...

Page 3

... Vcc 2.5V 8uA Delay 7msec R Delay 2msec Product Specification RI PG GND Vref Delay 300msec Delay 3sec COMP + _ O.S.C Error Amp COMP SG6105 VCC 20 14 FB1 13 VREF1 11 FB2 12 VREF2 9 OP1 8 OP2 www.sg.com.tw June 19, 2003 ...

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 - Product Specification SG6105 t UVP t NVP t OPP www.sg.com.tw June 19, 2003 ...

Page 5

... Test Condition PG High - - - - - - - - - V = 1.5V UVAC - RI = 75kΩ 75kΩ 75kΩ 75kΩ 75kΩ 75kΩ ; UVAC - 5 - Product Specification SG6105 Value Unit 1.5 W 0.5 W -55 to +150 82.5 /W 150 -30 to +125 260 3.0 kV Value Unit 4 -25 to +85 Min. ...

Page 6

... Min 75kΩ 75kΩ 1.5 Test Condition Min Test Condition Min 75kΩ 60 Test Condition Min 75kΩ Product Specification SG6105 Typ. Max. Unit 2.5 2.525 mV Typ. Max. Unit 300 400 ms 0.7 0. 300 ...

Page 7

... Output Voltage Low OL V Output Voltage High OH R Output Impedance ©System General Corp. Version 2.3(IRO33.0011.B0) Test Condition Min Test Condition Min 5mA - V12 = 12V Product Specification SG6105 Typ. Max. Unit - 93 % Typ. Max. Unit - 0 3.3 kΩ www.sg.com.tw June 19, 2003 ...

Page 8

... 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 GND IN COMP OP2 SS OPP - 8 - Product Specification SG6105 -12V 12V 5V 3.3V 5Vsb 47~100ohm Pok 1Kohm PSon -12V -5V 5V 12V www.sg.com.tw June 19, 2003 ...

Page 9

... D48 R101 R102 Q19 C67 C68 2 C70 R107 L18 L17 Q20 3 C73 C72 1 L19 C75 R110 R115 L20 C76 5V 12V R116 3.3V SG6105 CN2 F2 C40 R63 L11 L12 C44 C46 C47 TR2 BD1 2 3 C54 R82 VZ4 HHV C58 ...

Page 10

... PCB layout. SG6105 has OVP and UVP for 12V, 5V and 3.3V. Besides, the NVP is used for negative voltage protection, such as –12V and/or –5V. The UVAC (AC fails detection) is applied to detect AC line condition ...

Page 11

... VNVP = 64 uA × (R1 + R2) – V-12V The power outputs will be locked off when VNVP ≥ 2.1V. OP1 OP2 R2 OPP Product Specification SG6105 64uA -12V -5V 2.1V www.sg.com.tw June 19, 2003 ...

Page 12

... Product Specification Typ. Max. 0.210 0.130 0.135 0.060 0.018 1.030 1.060 0.300 0.250 0.255 0.100 0.130 0.150 0.355 0.375 7 15 www.sg.com.tw SG6105 June 19, 2003 ...

Page 13

... RIGHT TO MAKE CHANGES System General reserves the right to change this document and/or this product without notice. Customers are advised to consult their System General sales representative before ordering. ©System General Corp. Version 2.3(IRO33.0011.B0) DISCLAIMERS - 13 - Product Specification SG6105 www.sg.com.tw June 19, 2003 ...

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