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SDC4818 PDF даташит

Спецификация SDC4818 изготовлена ​​​​«SDC» и имеет функцию, называемую «Power Supply Pwm Supervisor».

Детали детали

Номер произв SDC4818
Описание Power Supply Pwm Supervisor
Производители SDC
логотип SDC логотип 

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SDC4818 Даташит, Описание, Даташиты
Datasheet
Power Supply Pwm Supervisor
SDC4818
General Description
Features
The SDC4818 controller is designed for switching mode
power supply for desktop PCs. Utilizing minimum number
Tof external components, the SDC4818 includes all of the
Nfunctions for push-pull and/or half-bridge topology,
decreasing the production cost and PCB space, and
Eincreasing the MTBF for power supply.
MTwo internal TL431 shunt regulators provide stable
CONFIDENTIAL DOCUreference voltage for 3.3V and 5V standby regulator.
Over-voltage/Under-voltage protection for
3.3V/±5V/±12V
Over-power protection
Short-circuit protection
AC input under voltage protection
Power good circuitry
PSON for remote controller
Delay time for PSON and PG signal
Two internal TL431 shunt regulators provide stable
reference voltage for 3.3V and 5V standby regulator
Soft-start and maximum 93% duty cycle
Applications
ATX power supply
SFX(MICRO-ATX) power supply
NLX power supply
SDC
DIP-20
Figure 1. Package Type
December, 2013 Rev. 1.1
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
1/13
www.sdc-semi.com









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SDC4818 Даташит, Описание, Даташиты
Datasheet
Power Supply Pwm Supervisor
SDC4818
Pin Configuration
Package:DIP-20
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
L DOCUMENTPinName
PSON
IAV33
TV5
OPP
NUVAC
ENVP
IDV12
OP2
FOP1
PG
NFB2
OVREF2
C VREF1
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
Figure 2. Pin Configuration
Function
Remote on/off input
OVP/UVP sense input for 3.3V
OVP/UVP sense input for 5V
Over-power sense input
Power good detection input
UVP sense input for negative voltage
OVP/UVP sense input for 12V
PWM totem-pole output 2
PWM totem-pole output 1
Power good signal
Output for second opamp loop
Input for second opamp loop
Input for first opamp loop
14
C15
16
D17
S 18
FB1
GND
COMP
IN
SS
Output for first opamp loop
Ground
Error amplifier output
Input of error amplifier
The soft-start function set through an external capacitor
19 RI
Reference setting by an external resistor
20 VCC
Supply voltage
Table 1. Pin Description
December, 2013 Rev. 1.1
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
2/13
www.sdc-semi.com









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SDC4818 Даташит, Описание, Даташиты
Datasheet
Power Supply Pwm Supervisor
SDC4818
Functional Block Diagram
1
PSON
NT2
V33
E3
MV5
Control
UVS
OVP
U7
V12
UVP
OC4
OPP
OPP
D5
UVAC
IAL6
CONFIDENTNVP
0.7V
2.1V
-
+
+-
VCC
20 19
VREF
431
+
-
PWM
OUT
PUT
15
10 18 17
16
Figure 3. Functional Block Diagram
14
FB1
13
VREF1
12
VREF2
11
FB2
9
OP1
8
OP2
SDC
December, 2013 Rev. 1.1
©2013 Shaoxing Devechip Microelectronics Co., Ltd.
3/13
www.sdc-semi.com










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Номер в каталогеОписаниеПроизводители
SDC4818Power Supply Pwm SupervisorSDC
SDC

Номер в каталоге Описание Производители
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Vishay
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LM317

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STMicroelectronics
STMicroelectronics

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