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PDF HS8108 Data sheet ( Hoja de datos )
| Número de pieza | HS8108 | |
| Descripción | Power supply switching mode controller IC | |
| Fabricantes | HuaXin | |
| Logotipo |  |
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 1. supply switching mode controller IC  Hay una vista previa y un enlace de descarga de HS8108 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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HS8108 DATASHEET
DESCRIPTION：
HS8108 is a power supply switching mode controller IC 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. A built-in timer generates accurate timing for control circuit
including the PS-off delay. The cycle-by-cycle PWM switching prevents the
power transformer from saturation and ensure the fastest response for the
short-circuit protection which greatly reduce the stress for power
transistors. Two internal precise 431 shunt regulators provide stable
reference voltage and driver for 3.3V and 5V-standby regulation. Utilizing
minimum number of external components, the HS8108 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.
FEATURES：
PC half-bridge (or 494) power supply supervisor + two 431 + PWM
Remote ON/OFF function
Power-down warning circuitry ﹠ Power good circuitry
Delay time for PSON and PG signal
Over-voltage protection for 3.3V, 5V and 12V
Under-voltage protection for 3.3V, 5V,12V, -12V and/or -5V
Push-pull PWM operation and totem pole outputs
Over-power and short-circuit protection
Two shunt regulator for 3.3V and 5V Sb
Soft-start and maximum 93% duty cycle
On-chip oscillator and error amplifier
1 Ver. 060122
1 page  
Remote On/Off:
Symbol
Parameter
Vpson PSON Input Threshold Level
Ipson Remote Input Driving Current
tpson(ON) Timing PSON to On
tpson(OFF) Timing PSON to Off
tpsoff Timing PG low to Power Off
Test Condition
---
---
RI=75KΩ
RI=75KΩ
RI=75KΩ
Min.
1
---
17
5
1.5
Typ.
1.4
---
26
7.5
2
Max.
2.0
0.5
45
28.8
6.3
unit
V
mA
ms
ms
ms
Power Good Section(PG):
Symbol
Parameter
tpg Timing for PG Delay
Vuvac UVAC Voltage Sense for PG
tr PG Good Output Rising Time
tf PG Good Falling Time
VOL2 Power Good Output
Saturation Level
ION2 Power Good Leakage
Current Collector
Test Condition
RI=75KΩ
---
CL=100pF
CL=100pF
Ipg=5mA
Vpg=5V
Min.
200
0.65
---
---
---
---
Typ.
300
0.7
1
300
---
---
Max.
400
0.75
---
---
0.5
1
unit
ms
V
us
ns
V
uA
PWM:
Symbol
Parameter
Test Condition Min.
PWM Output Section (OP1, OP2)
Vol Output Voltage Low Io=5mA
---
Voh Output Voltage High V12=12V
4
Ro Output Impedance of VOH ---
1.5
Oscillator Section
Fosc PWM Frequency
RI=75KΩ
60
Soft-Start Section
Iss Charge Current
RI=75KΩ
6
Comparator Section
DC Duty Cycle
85
Typ.
---
---
---
65
8
---
Max. unit
0.5 V
--- V
3.3 KΩ
70 KHz
9.3 uA
93 %
5 Ver. 060122
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet HS8108.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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