FSDM311 Datasheet, PDF (1/16 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch (FPSTM)

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FSDM311
Green Mode Fairchild Power Switch (FPS^TM)
Features
• Internal Avalanche Rugged Sense FET
• Precision Fixed Operating Frequency (67KHz)
• Consumes Under 0.2W at 265VAC & No Load with
Advanced Burst-Mode Operation
• Internal Start-up Circuit
• Pulse-by-Pulse Current Limiting
• Over Voltage Protection (OVP)
• Over Load Protection (OLP)
• Internal Thermal Shutdown Function (TSD)
• Auto-Restart Mode
• Under Voltage Lockout (UVLO) with Hysteresis
• Built-in Soft Start
• Secondary Side Regulation
PRODUCT
FSDM311
FSDM311L
OUTPUT POWER TABLE
Open Frame⁽¹⁾
230VAC±15%⁽²⁾
85-265VAC
13W
8W
13W
8W
Notes:
1. Maximum practical continuous power in an open frame
design with sufficient drain pattern as a heat sinker, at 50°C
ambient.
2. 230 VAC or 100/115 VAC with doubler.
Applications
• Charger & Adapter for Mobile Phone, PDA & MP3
• Auxiliary Power for White Goods, PC, C-TV & Monitor
Typical Circuit
Related Application Notes
• AN-4137, 4141, 4147(Flyback) / AN-4134(Forward) /
AN-4138(Charger)
Description
The FSDM311 consists of an integrated Pulse Width Modu-
lator (PWM) and Sense FET, and is specifically designed for
high performance off-line Switch Mode Power Supplies
(SMPS) with minimal external components. This device is
an integrated high voltage power switching regulator which
combines an VDMOS Sense FET with a voltage mode PWM
control block. The integrated PWM controller features
include: a fixed oscillator, Under Voltage Lock Out (UVLO)
protection, Leading Edge Blanking (LEB), an optimized gate
turn-on/turn-off driver, Thermal Shut Down (TSD) protec-
tion and temperature compensated precision current sources
for loop compensation and fault protection circuitry. When
compared to a discrete MOSFET and controller or RCC
switching converter solution, the FSDM311 device reduces
total component count, design size, weight while increasing
efficiency, productivity and system reliability. This device
provides a basic platform that is well suited for the design of
cost-effective flyback converters.
AC
IN
Vstr Drain
PWM
Vfb
Vcc
Source
DC
OUT
Figure 1. Typical Flyback Application
FPS^TM is a trademark of Fairchild Semiconductor Corporation.
©2005 Fairchild Semiconductor Corporation
Rev.1.0.9