NCP4350 Datasheet, PDF (1/10 Pages) ON Semiconductor – Supervisory IC

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 I_REF 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 V_CC = 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
1
September, 2007 - Rev. 0
Publication Order Number:
NCP4350/D