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NCP4350 PDF даташит

Спецификация NCP4350 изготовлена ​​​​«ON Semiconductor» и имеет функцию, называемую «Supervisory IC».

Детали детали

Номер произв NCP4350
Описание Supervisory IC
Производители ON Semiconductor
логотип ON Semiconductor логотип 

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NCP4350 Даташит, Описание, Даташиты
NCP4350
Supervisory IC for Desktop
Power Supply Monitoring
The NCP4350 provides all the necessary functions to monitor and
control a multi-output power supply providing fault protection
shutdown signals, and On/Off control. The NCP4350 provides the
ability to monitor the status of the +5 Vdc, +12 Vdc (A and B outputs),
and +3.3 Vdc output (voltage and current). The controller has built in
delay to prevent tripping during transient conditions to eliminate false
shutdowns.
OVP/UVP (OverVoltage/UnderVoltage Protection) monitors 3.3ĂV,
5ĂV, and dual 12ĂV to protect the power supply, FPOB output goes high
when one of these supply voltages exceed their limits.
OCP (OverCurrent Protection) monitors 3.3ĂV, 5ĂV, and dual 12ĂV
output current. Overcurrent limit is adjustable by IREF and current
protection resistor.
The PGI (Power Good Input) and OTP (OverTemperature
Protection) input pin provides the flexibility for design protection
circuit.
The PGO (Power Good Output) signal gives personal computer
notice when the output supplies are ready or power supply is going to
shutdown or fail, therefore it can provide a reliable power supply
environment.
Features
ăIndividual Overvoltage and Undervoltage Monitoring for +3.3ĂV,
+5ĂV, +12ĂVA, +12ĂVB Outputs and Lockout
ăIndividual Overcurrent Monitoring for +3.3ĂV, +5ĂV, +12ĂVA,
+12ĂVB Outputs and Lockout
ăFault Output with 5 mA of Sink Capability
ăRemote On/Off
ăPower Good Output Signal with 5 mA of Sink Capability
ăBuilt-in Delays for OVP, UVP, and Overload to avoid False Tripping
ăLow Power Consumption 10 mW at VCC = 5ĂV Typical
ăOvertemperature Input
ăWide Power Supply Range (4 V - 16 V)
Typical Applications
ăATX Computers
http://onsemi.com
MARKING DIAGRAM
SOIC-16
D SUFFIX
CASE 751B
NCP4350DG
AWLYWW
1
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb-Free Device
PIN CONNECTIONS
PGI 1
GND 2
FPOB 3
PSONB 4
IS12A 5
RI 6
IS12B 7
VS12B 8
16 PGO
15 VCC
14 VS5
13 VS33
12 VS12A
11 IS33
10 IS5
9 OTP
(Top View)
ORDERING INFORMATION
Device
Package
Shipping{
NCP4350DR2G SOIC-16 3000/Tape & Reel
(Pb-Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
©Ă Semiconductor Components Industries, LLC, 2007
September, 2007 - Rev. 0
1
Publication Order Number:
NCP4350/D









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NCP4350 Даташит, Описание, Даташиты
Vref (1.25 V)
OTP
-
+
VS33
On OTP
+ UN
-
+ OV
-
VS5
VS12A
+ UN
-
+ OV
-
+ UN
-
+ OV
-
VS12B
+ UN
-
+ OV
-
Vref
IS33
IREF x 8
IS5
IS12A
IREF x 8
IREF x 8
+
-
+
-
+
-
IS12B
IREF x 8
+
-
GND
NCP4350
Remote On/Off
Delay
38 ms (typ)
POR
UV Fault Delay
1 ms (typ)
4 ms One
Shot
Internal VCC
170 mA
0.8 V - 2.0 V
PSONB
Fault (FPOB)
RQ
SQ
RQ
UV/OL Blanking
75 ms (typ)
OV Fault Delay
14 ms (typ)
SQ
Reset
Dominate
PWR Good Delay
300 ms (typ)
PGO
20 ms OCP
+
Vref -
IREF x 8
IREF x 8
Buffer Vref
PGI RI
Figure 1. Detailed Block Diagram
1.25 V ±3%
Bandgap
Reference
Internal
Power
+VCC
http://onsemi.com
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NCP4350 Даташит, Описание, Даташиты
NCP4350
PIN DESCRIPTION
Pin Pin#
PGI 1
GND
2
FPOB
3
PSONB
4
IS12A
5
RI 6
IS12B
7
VS12B
8
OTP
9
IS5 10
IS33
11
VS12A
12
VS33
13
VS5 14
+VCC
PGO
15
16
Description
The pin is used for a power good input signal.
Ground
This is an open drain output for Fault protection shutdown.
This pin is used for a REMOTE on/off switch input and acts as a reset signal after a fault condition.
This pin is an input to the +12 VA output current monitoring comparator.
A resistor to ground sets the IREF current for overcurrent monitoring.
This pin is an input to the +12 VB output current monitoring comparator.
This pin is an input to the +12 VB output voltage monitoring comparator.
Overtemperature or external protection input.
This pin is an input to the +5 V output current monitoring comparator.
This pin is an input to the +3.3 V output current monitoring comparator.
This pin is an input to the +12 VA output voltage monitoring comparator.
This pin is an input to the +3.3 V output voltage monitoring comparator.
This pin is an input to the +5 V output voltage monitoring comparator.
This is the input pin for VCC.
This pin provides an open drain power good output signal.
+16 V
+12 V
RECT
SYNC RECT
+ DRV
OTP L12V
IS12B
L5V
L33V
SYNC RECT
+ DRV
IS5V
IS33V
W2
W1
IS12A
R12VA
R12VB
R33V
R5V
VS12A
VS12B
VS5
VS33
IS12B
IS12A
IS33
IS5
OTP
GND
RI
+12 VB
+12 VA
OTP
+5 V
+3.3 V
PGO
PGO
L+5VSTBY
+VCC FPOB PSONB PGI
PSONB
R1 R2
R3
4
1
+5 Vstandby
32
1
4
23
1
4
23
Figure 2. Typical Application
http://onsemi.com
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