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KA3502 Datasheet Pc Smps Supervisory Ic

Manufacturer: Fairchild (now onsemi)

Overview: .fairchildsemi. KA3502 PC SMPS Supervisory IC.

General Description

s The KA3502 is plete housekeeping circuitry for use in the secondary side of SMPS(Switched Mode Power Supply).

It contains various functions, which are two Precision Voltage References, Over Voltage/Current Protection, Remote On/Off Control, Power Good Signal Generator, Disable Logic and etc.

20-DIP 1 Internal Block Diagram V33 V5 V12 1 2 3 PWM FB1 VREF1 UV 14 11 6 15 VCC 5 R3 R1 R5 Vcc Adj 4 R2 R4 R6 + + + + 1.26V P1 Ion R8 1k R10 39k Ichg R15 5.1k 9 R9 10k R13 Vcc 5.2V + P9 Q3 PG Tsur 17 2.7V IS5 19 -+ 50mV IS33 20 -+ 135mV IS12 18 Vcc + P2 Vcc + P3 Vcc + - + - P4 65mV Vcc + 2V S Vcc Q R Q1 REFERENCE1 + P7 Vcc + P8 R12 1.28V↔1.24V 2V↔1.3V Q2 P5 Vcc Vcc + P6 1.4V Ion+ Ioff 2.8V + 2V↔0.7V R11 5.4k 12 FB2 R14 REFERENCE2 13 VREF2 R7 7 REM 8 Trem 16 GND 10 Topr Rev.

Key Features

  • Complete Housekeeping Circuit Few External Components Over Voltage Protection for 3.3V/5V/12V/Adj. Output Over Current Protection for 3.3V/5V/12V Output Open-Collector Output and Remote On/Off Function Remote On/Off Delay Time Control Precision Voltage Reference for Outputs, 5V/12V Uncommitment Precision Voltage Reference for +5Vs Power Good Signal Generator with Hysteresis Disable Logic of 3.3V,.

More Datasheets from Fairchild (now onsemi)

Part Number Description
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KA3501 PC SMPS Supervisory IC
KA3504 PC SMPS Supervisory IC
KA3505 PC SMPS Supervisory IC
KA3524 SMPS Controller
KA3525A SMPS CONTROLLER
KA353 Dual Operational Amplifier
KA358 Dual Operational Amplifier
KA358A Dual Operational Amplifier
KA3011 3-Phase BLDC Motor Driver

KA3502 Distributor