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Operator's Manual
FSD200
Fairchild Power Switch(FPS)
Features
• Single Chip 700V SenseFET Power Switch
• Precision Fixed Operating Frequency (134kHz)
• Internal Start-up Switch and Soft Start
• UVLO with Hysteresis (6V/7V)
• Pulse by Pulse Current Limit
• Over Load Protection
• Internal Thermal Shutdown Function (Hysteresis)
• Secondary Side Regulation
• Auto-Restart Mode
• Frequency Modulation for EMI
• No Bias Winding
Applications
• Charger & Adaptor for Mobile Phone, PDA & MP3
• Auxiliary Power for PC, C-TV & Monitor
Internal Block Diagram
Vcc
7
250uA
5uA
Vfb
4
©2003 Fairchild Semiconductor Corporation
7V
UVLO
Frequency
Modulation
OSC
BURST
V
BURST
OLP
Reset
V
SD
TSD
His 50
Description
The FSD200 is specially designed for an off-line SMPS with
minimal external components. The FSD200 is a monolithic
high voltage power switching regulator that combines an
LDMOS SenseFET with a voltage mode PWM control
block. The integrated PWM controller features: A fixed
oscillator with frequency modulation for reduced EMI.
Under voltage lock out. Leading edge blanking(LEB).
Optimized gate turn-on/turn-off driver. Thermal shut down
protection. Temperature compensated precision current
sources for loop compensation and fault protection circuitry.
Compared to a discrete MOSFET and controller or RCC
switching converter solution, an FSD200 can reduce total
component count, design size, weight and at the same time
increase efficiency, productivity, and system reliability. It is
a basic platform well suited for cost effective design of fly-
back converters.
7-DIP
1.2.3.GND 4.Vfb 5.Vcc 7.Drain 8.Vstr
HV/REG
Voltage
INTERNAL
Ref.
BIAS
Vck
S
Q
R
LEB
Iover
S
Q
R
UVLO Reset
(Vcc<6V)
www.fairchildsemi.com
Vstr
1
ON/OFF
7
SFET
DRIVER
Rsense
Vth
S/S
3mS
GND
1, 2, 3
Drain
Rev.1.0.0
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Summary of Contents for Fairchild FSD200
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Page 1: Internal Block Diagram
Features Description • Single Chip 700V SenseFET Power Switch The FSD200 is specially designed for an off-line SMPS with • Precision Fixed Operating Frequency (134kHz) minimal external components. The FSD200 is a monolithic • Internal Start-up Switch and Soft Start high voltage power switching regulator that combines an •... -
Page 2: Absolute Maximum Ratings
FSD200 Absolute Maximum Ratings (Ta=25°C unless otherwise specified) Parameter Symbol Value Unit Maximum Vstr Pin Voltage str,max Maximum Supply Voltage CC,MAX −0.3 to V Input Voltage Range −25 to +85 °C Operating Ambient Temperature −55 to +150 °C Storage Temperature Range... -
Page 3: Electrical Characteristics
FSD200 Electrical Characteristics (Ta=25°C unless otherwise specified) Parameter Symbol Condition Min. Typ. Max. Unit SENSEFET SECTION Drain-Source Breakdown Voltage = 0V, I = 100µA µA Off-State Current = 560V Ω Tj = 25°C, I = 25mA On-State Resistence DS(ON) Ω... -
Page 4: Typical Performance Characteristics
FSD200 Typical Performance Characteristics (These characteristic graphs are normalized at Ta=25°C) O u tp u t Fre q u e n c y O pe r a ti ng Cur re n t O pe r a ti ng Cur re n t 0.75... - Page 5 FSD200 Typical Performance Characteristics (Continued) (These characteristic graphs are normalized at Ta=25°C) Breakdow n Voltage On_State_Resistance Rds(on) Breakdow n Voltage Figure 8. Breakdown Voltage vs. Temp Figure 7. On State Resistance vs. Temp...
- Page 6 FSD200 Typical Circuit Snubber Load Circuit FSD200 Feedback Circuit...
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Page 7: Product Information
Product Information the KA431 reference pin voltage exceeds the internal reference voltage of 2.5V, the optocoupler LED current Basic system topology of FSD200/210 is the same as increase pulling down the feedback voltage and the original FSDH565/0165 devices. The FSD210 reducing the duty cycle. - Page 8 Cfb from 3V to 4V with 5uA as TSD Hysteresis shown in Fig. 5. 5. Soft Start : FSD200/210 has an internal soft start circuit that increases the feedback voltage together with the MOSFET current slowly at start up. The soft...
- Page 9 I(A) 0.3A Iover 0.25A 0.2A 0.6V 0.5V FSD200/210 6. Burst operation : In order to minimize the power dissipation in standby mode, the FSD200/210 implements burst mode. time Figure 7. Burst mode operation GATE DRIVER 250uA 7. Frequency Modulation on/off 0.6V...
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Page 10: Typical Application Circuit
FSD200 Typical application circuit 1. Cellular Phone Charger Example Circuit C6 152M-Y, 250Vac 4.7M, 1/4W 4.7M 1/4W L1 330uH Fuse SB260 R1 4.7k (5.2V/0.65A) 1W, 10R 330uF 16V 330uF 16V 1N4007 1N4007 102k 1kV 2.2k 510R H11A817B 4.7UF 400V 4.7uF 400V... - Page 11 FSD200 Typical application circuit 2. Buck Convertor Vin,dc Vin,dc UF4004 UF4004 Vstr Vstr FSD21x FSD20x 1N759A 1N759A 4.7uF/50V 4.7uF/400V R1 100 47uF 25V 4.7uF/400V R1 100 47uF 25V 5.6k 10uF/50V 2N3904 10uF/50V 2N3904 UF4004 UF4004 680uF 16V 680uF 16V Reference...
- Page 12 FSD200 Package Dimensions 7-DIP...
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Page 13: Ordering Information
FSD200 Ordering Information Product Number Package Rating Topr (°C) −25°C to +85°C FSD200 7DIP 700V, 0.5A... - Page 14 DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION.
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