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Fairchild Semiconductor Electronic Components Datasheet

FSDM311A Datasheet

Green Mode Fairchild Power Switch

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November 2007
FSDM311A
Green Mode Fairchild Power Switch (FPS™)
Features
ƒ Internal Avalanche-Rugged SenseFET
ƒ Precision Fixed Operating Frequency: 67KHz
ƒ Consumes Under 0.2W at 265VAC & No Load with
Advanced Burst-Mode Operation
ƒ Internal Start-up Circuit
ƒ Pulse-by-Pulse Current Limiting
ƒ Over-Voltage Protection (OVP)
ƒ Overload Protection (OLP)
ƒ Internal Thermal Shutdown Function (TSD)
ƒ Auto-Restart Mode
ƒ Under-Voltage Lockout (UVLO) with Hysteresis
ƒ Built-in Soft-Start
ƒ Secondary-Side Regulation
Applications
ƒ Charger & Adapter for Mobile Phone, PDA, & MP3
ƒ Auxiliary Power for White Goods, PC, C-TV, &
Monitors
Description
The FSDM311A consists of an integrated Pulse Width
Modulator (PWM) and SenseFET, 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 that combines a VDMOS
SenseFET with a voltage-mode PWM control block. The
integrated PWM controller features include a fixed
oscillator, Under-Voltage Lockout (UVLO) protection,
Leading-Edge Blanking (LEB), an optimized gate turn-
on/turn-off driver, Thermal Shutdown (TSD) protection,
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
FSDM311A device reduces total component count and
design size and 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.
Related Resources
AN-4134: Design Guidelines for Off-line Forward
Converters Using Fairchild Power Switch (FPS™)
AN-4137: Design Guidelines for Off-line Flyback
Converters Using Fairchild Power Switch (FPS™)
AN-4138: Design Considerations for Battery Charger
Using Green Mode Fairchild Power Switch (FPS™)
AN-4140: Transformer Design Consideration for Off-
line Flyback Converters Using Fairchild Power Switch
(FPS™)
AN-4141: Troubleshooting and Design Tips for
Fairchild Power Switch (FPS™) Flyback Applications
AN-4147: Design Guidelines for RCD Snubber of
Flyback
AN-4148: Audible Noise Reduction Techniques for
FPS™ Applications
www.DataSheet4U.com
Ordering Information
Product Number
FSDM311A
Package
8DIP
Marking Code
DM311A
All packages are lead free per JEDEC: J-STD-020B standard.
FPS™ is a trademark of Fairchild Semiconductor Corporation.
© 2007 Fairchild Semiconductor Corporation
FSDM311A • Rev.1.0.2
BVDSS
650V
fOSC
67KHz
RDS(ON)
14
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FSDM311A Datasheet

Green Mode Fairchild Power Switch

No Preview Available !

Typical Application & Output Power Table
Figure 1. Typical Flyback Application
OUTPUT POWER TABLE
Product
Open Frame(1)
230VAC ±15%(2)
85~265VAC
FSDM311A
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. 230VAC or 100/115VAC with doubler.
Internal Block Diagram
VCC 2
UVLO
IDELAY IFB
5 A 400 A
Vfb 3
L
Voltage
Ref
Internal
Bias
9/7V
H
OSC
PWM
Vck
SQ
R
Vstr Drain
5 6,7,8
DRIVER
SFET
NC 4
VBURL/
VBURH
S/S
15mS
BURST
OLP
Reset
Min.20V
VSD
OVP
TSD
SQ
R
A/R
LEB
ILIM
Vth
Figure 2. Functional Block Diagram
Rsense
1
GND
www.DataSheet4U.com
© 2007 Fairchild Semiconductor Corporation
FSDM311A • Rev.1.0.2
2
www.fairchildsemi.com


Part Number FSDM311A
Description Green Mode Fairchild Power Switch
Maker Fairchild Semiconductor
Total Page 12 Pages
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