FSD200 , FSD200DIP , AC DC Converters, Offline Switches

Features

• Single Chip 700V Sense FET Power Switch

• Precision Fixed Operating Frequency (134kHz)

• Advanced Burst-Mode operation Consumes under 0.1W

  at 265Vac and no load (FSD210 only)

• Internal Start-up Switch and Soft Start

• Under Voltage Lock Out (UVLO) with Hysteresis

• Pulse by Pulse Current Limit

• Over Load Protection (OLP)

• Internal Thermal Shutdown Function (TSD)

• Auto-Restart Mode

• Frequency Modulation for EMI

• FSD200 does not require an auxiliary bias winding

  Applications

  • Charger & Adaptor for Mobile Phone, PDA & MP3

  • Auxiliary Power for White Goods, PC, C-TV & Monitor

    Description

    The FSD200 and FSD210 are integrated Pulse Width Modu- lators (PWM) and Sense FETs specially designed for high performance off-line Switch Mode Power Supplies (SMPS) with minimal external components. Both devices are mono- lithic high voltage power switching regulators which com- bine an LDMOS Sense FET with a voltage mode PWM control block. The integrated PWM controller features in- clude: a fixed oscillator with frequency modulation for re- duced EMI, Under Voltage Lock Out (UVLO) protection, Leading Edge Blanking (LEB), optimized gate turn-on/turn- off driver, thermal shut down protection (TSD), temperature compensated precision current sources for loop compensa- tion and fault protection circuitry. When compared to a dis- crete MOSFET and controller or RCC switching converter solution, the FSD200 and FSD210 reduce total component count, design size, weight and at the same time increase effi- ciency, productivity, and system reliability. The FSD200 eliminates the need for an auxiliary bias winding at a small cost of increased supply power. Both devices are a basic plat- form well suited for cost effective designs of flyback convert- ers.

Table 1. Notes: 1. Typical continuous power in a non-ven- tilated enclosed adapter measured at 50°C ambient. 2. Maximum practical continuous power in an open frame design at 50°C ambient. 3. 230 VAC or 100/115 VAC with doubler.

Typical Circuit

Figure 1. Typical Flyback Application using FSD210

Figure 2. Typical Flyback Application using FSD200