FSD146MRBN.pdf 데이터시트 (총 16 페이지) - 파일 다운로드 FSD146MRBN 데이타시트 다운로드

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October 2011
FSD146MRBN
Green-Mode Fairchild Power Switch (FPS™)
Features
Advanced Soft Burst-Mode Operation for
Low Standby Power and Low Audible Noise
Random Frequency Fluctuation for Low EMI
Pulse-by-Pulse Current Limit
Various Protection Functions: Overload Protection
(OLP), Over-Voltage Protection (OVP), Abnormal
Over-Current Protection (AOCP), Internal Thermal
Shutdown (TSD) with Hysteresis, Output-Short
Protection (OSP), and Under-Voltage Lockout
(UVLO) with Hysteresis
Low Operating Current (0.4mA) in Burst Mode
Internal Startup Circuit
Internal High-Voltage SenseFET: 650V
Built-in Soft-Start: 15ms
Auto-Restart Mode
Description
The FSD146MRBN is an integrated Pulse Width
Modulation (PWM) controller and SenseFET designed
for offline Switch-Mode Power Supplies (SMPS) with
minimal external components. The PWM controller
includes an integrated fixed-frequency oscillator, Under-
Voltage Lockout (UVLO), Leading-Edge Blanking (LEB),
optimized gate driver, internal soft-start, temperature-
compensated precise current sources for loop
compensation, and self-protection circuitry. Compared
with a discrete MOSFET and PWM controller solution,
the FSD146MRBN can reduce total cost, component
count, size, and weight; while simultaneously increasing
efficiency, productivity, and system reliability. This
device provides a basic platform that is well suited for
cost-effective design of a flyback converter.
Applications
Power Supply for LCD Monitor, STB, and
DVD Combination
Ordering Information
Part
Number
Output Power Table(2)
Package
Operating
Junction
Temperature
Current
Limit
RDS(ON)
(Max.)
230VAC ± 15%(3)
Adapter(4)
Open
Frame(5)
85-265VAC
Adapter(4)
Open
Frame(5)
Replaces
Device
FSD146MRBN 8-DIP
-40°C ~
+125°C
1.50A 2.6
23W
35W
17W
26W FSFM260N
Notes:
1. Lead-free package per JEDEC J-STD-020B.
2. The junction temperature can limit the maximum output power.
3. 230VAC or 100/115VAC with voltage doubler.
4. Typical continuous power in a non-ventilated enclosed adapter measured at 50C ambient temperature.
5. Maximum practical continuous power in an open-frame design at 50C ambient temperature.
© 2011 Fairchild Semiconductor Corporation
FSD146MRBN • Rev. 1.0.0
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/

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Application Circuit
Figure 1. Typical Application Circuit
Internal Block Diagram
© 2011 Fairchild Semiconductor Corporation
FSD146MRBN • Rev. 1.0.0
Figure 2. Internal Block Diagram
2
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/

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Pin Configuration
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin #
1
2
3
4
5, 6, 7, 8
Name
GND
VCC
FB
N.C.
Drain
Description
Ground. This pin is the control ground and the SenseFET source.
Power Supply. This pin is the positive supply input, which provides the internal operating
current for both startup and steady-state operation.
Feedback. This pin is internally connected to the inverting input of the PWM comparator.
The collector of an opto-coupler is typically tied to this pin. For stable operation, a capacitor
should be placed between this pin and GND. If the voltage of this pin reaches 7.0V, the
overload protection triggers, which shuts down the FPS™.
No Connection
SenseFET Drain. High-voltage power SenseFET drain connection.
© 2011 Fairchild Semiconductor Corporation
FSD146MRBN • Rev. 1.0.0
3
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/