This document describes the features of FSQ0370RNA and FSQ0370RLA, two green mode Fairchild power switches. These products have internal avalanche rugged 700V SenseFET, low power consumption, precision fixed operating frequency, internal startup circuit and built-in soft-start, pulse-by-pulse current limiting, auto-restart mode, over-voltage protection, overload protection, internal thermal shutdown function, and under-voltage lockout. They are suitable for auxiliary power supply for PC and server, SMPS for VCR, SVR, STB, DVD, and DVCD players, and adapter for camcorders.
The document describes the FSQ0370, an integrated Current Mode Pulse Width Modulator (PWM) and avalanche rugged 700V SenseFET designed for high-performance offline Switched Mode Power Supplies (SMPS). It features a fixed operating frequency of 100kHz, internal startup circuits, soft-start, pulse-by-pulse current limiting, and various protection functions including Over-Voltage Protection (OVP) and Thermal Shutdown.
| Drain Pin Voltage (BVopss) | 700 V |
|---|---|
| Switching Frequency (fosc) | 100 kHz |
| Operating Ambient Temperature | -40 to +85 °C |
| Total Power Dissipation (Pp) | 1.5 W |
| Peak Current Limit (Ipk) | Typical 1.1A |
It is designed for auxiliary power supplies in PCs and servers, as well as SMPS for VCRs, SVRs, STBs, DVD players, printers, facsimiles, scanners, and camcorder adapters.
The maximum duty cycle is 65%.
The device shuts down thermally at a typical temperature of 140°C.