This document describes the features and characteristics of the Fairchild Power Switch (FPS) product family, including precision fixed operating frequency, low start-up current, pulse by pulse current limiting, over current protection, over voltage protection, internal thermal shutdown function, under voltage lockout, and internal high voltage sense FET. The FPS is suitable for SMPS applications in VCRs, SVRs, STBs, DVDs, DVCDs, printers, facsimiles, scanners, and camcorder adapters.
This handbook describes the Fairchild Power Switch (FPS) family for the KA5x03xx series, highlighting precision fixed operating frequency, low start‑up current, pulse‑by‑pulse current limiting, over‑current and over‑voltage protection, internal thermal shutdown, and auto‑restart mode. It includes a description of the integrated PWM controller, SenseFET, and typical applications such as SMPS for VCR, DVD, printers, scanners and camcorder adapters.
The document provides absolute maximum ratings, detailed electrical characteristics for both the SenseFET and control sections, typical performance curves, ordering information, and legal disclaimer. Key specifications such as maximum drain voltage, current limits, supply voltage, oscillator frequency, and operating temperature ranges are listed for each model variant.
| Maximum Drain Voltage (VD,MAX) | 650 V (for KAS5HO365R, KA5M0365R, KAS5LO365R) |
|---|---|
| Maximum Drain Voltage (VD,MAX) | 800 V (for KA5HO380R, KA5M0380R, KA5L0380R) |
| Pulsed Drain Current (IDM) | 12.0 A |
| Continuous Drain Current (ID) @ 25 °C | 3.0 A |
| Maximum Supply Voltage (VCC,MAX) | 30 V |
| Operating Ambient Temperature (TA) | -25 °C to +85 °C |
| Operating Junction Temperature (TJ) | +160 °C |
| Oscillator Frequency (Fosc) typical | 100 kHz (KAS5HO365R) |
| Start‑up Current (ISTART) | Typical 100 µA |
The typical start‑up current is 100 µA.
The KA5HO365R model can withstand a maximum drain voltage of 650 V.
The device operates from –25 °C to +85 °C ambient temperature.
The typical oscillator frequency is 100 kHz.