SG6105ADZ中文资料

APPLICATIONS
Switching mode power supply for computers:
AT NLX SFX (micro-ATX)
Product Specification
SG6105A
DESCRIPTION
SG6105A controller is designed for switching-mode power supplies 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, and protection features against over-voltage and over-power are implemented. It directly senses all the output rails for OVP without the need for external dividers. An innovative AC-signal sampling circuitry provides a sufficient power-down warning signal for PG.
17 Analog Input
SS RI VCC
18 Analog Input
Program Analog 19
Input 20 Supply
Function
Remote on/off logic input for CPU or controller. Turn on/off the PWM output after the 7.5ms / 26ms delay. PSON = 0, the main SMPS is operational. PSON =1, the main SMPS is off and the latch is reset. 3.3V over-voltage/under-voltage control sense input. 5V 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. AC fail detection, detect main AC voltage under-voltage and/or failure. The protection input for negative Output, such as –12V and/or –5V. Trip voltage = 2.1V. 12V over-voltage/under-voltage control sense input. 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%. Power-good logic output, 0 or 1 (open-collector). PG = 1, the power is good for operation. The PG delay is 300ms. Output for second converter regulation loop. Reference comparison input for second converter regulation loop, 2.5V. Reference comparison input for first converter regulation loop, 2.5V. Output for first converter regulation loop. Ground. 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, settable through an external capacitor. The current source output at this pin is 8µA and the voltage is clamped at 2.5V.
元器件交易网
Power Supply Supervisor + Regulator + PWM
TYPICAL APPLICATION 2
Product Specification
SG6105A
© System General Corp. Version 1.0.1 (IAO33.0072.B0)
Connected to external resistor for the reference setting. RI = 75kΩ.
V12
7
Analog Input
OP1/OP2 9/8 Analog Output
PG
FB2 VREF2 VREF1 FB1 GND COMP
IN
10 Logic Output
11 Analog Output 12 Analog Input 13 Analog Input 14 Analog Output 15 Supply 16 Analog Output
A built-in timer generates accurate timing for the control circuit, including the PS-off delay. The cycle-by-cycle PWM switching prevents the power transformer from saturation and ensures the fastest response for the short-circuit protection, which greatly reduces stress for power transistors. Two internal precision TL431 shunt regulators provide stable reference voltage and a driver for 3.3V and 5V standby regulation.
© System General Corp. Version 1.0.1 (IAO33.0072.B0)
-1-
•
September 25, 2007
元器件交易网
Power Supply Supervisor + Regulator + PWM
1
T : D = DIP P : Z = Lead Free Null=regular package XXXXXXXX: Wafer Lot Y: Year; WW: Week V: Assembly Location
Product Specification
SG6105A PIN CONFIGURATION
PSON
1
V33
2
V5
3
OPP
4
UVAC
5
NVP
6
V12
7
OP2
8
OP1
9
PG
10
20
VCC
19
RI
18
SS
17
IN
16
COMP
15
GND
14
FB1
13
VREF1
12
VREF2
11
FB2
ORDERING INFORMATION
Part Number
Pb-Free Package
SG6105ADZ
20-Pin DIP
Product Specification
SG6105A
PIN DESCRIPTIONS
Name Pin Type
PSON
1
Logic Input
V33
2
Analog Input
V5
3
Analog Input
OPP
4
Analog Input
UVAC
5
Analog Input
NVP
6
Analog Input
© System General Corp. Version 1.0.1 (IAO33.0072.B0)
-4-
•
September 25, Fra bibliotek007元器件交易网
Power Supply Supervisor + Regulator + PWM
-3-
•
September 25, 2007
元器件交易网
Power Supply Supervisor + Regulator + PWM
MARKING DIAGRAMS 20
SG6105ATP
XXXXXXXXYWWV
元器件交易网
Power Supply Supervisor + Regulator + PWM