FSL176MRT.pdf 데이터시트 (총 16 페이지) - 파일 다운로드 FSL176MRT 데이타시트 다운로드

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August 2012
FSL176MRT
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 F SL176MRT is an
integrated Pulse W idth
Modulation (PWM) controller and SenseFET specifically
designed for offline Sw itched-Mode Power Supplies
(SMPS) with minimal external components. T he PW M
controller includes an in
tegrated fixed-frequency
oscillator, Under-Voltage Lockout (UVLO), Leading-
Edge Blanking (LEB), optimized gate driver, internal
soft-start, temperature-co mpensated precise current
sources for loop compensation, and self-protection
circuitry. Compared with a discrete MOSF ET and PW M
controller solution, the F SL176MRT can reduce total
cost, component count, size, and w eight; w hile
simultaneously increasing efficiency , productivity , and
system reliability. T his device provides a basic platform
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
TO-220
FSL176MRTUDTU
6-Lead(1)
U-
Forming
-40°C ~
+125°C
3.50A 1.6
80W
90W
48W
70W FSGM0765R
Notes:
1. Pb-free package per JEDEC J-STD-020B.
2. The junction temperature can limit the maximum output power.
3. 230V AC 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.
© 2012 Fairchild Semiconductor Corporation
FSL176MRT • Rev. 1.0.0
www.fairchildsemi.com
http://www.Datasheet4U.com

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Application Circuit
AC
IN
VSTR
Drain
GND
FB VCC
VO
Figure 1. Typical Application Circuit
Internal Block Diagram
VBURST
0.30V / 0.45V
Soft Burst
FB 4
N.C. 5
VCC
Vref
2.0µA
IDELAY
90µA
IFB
Soft-Start
tON<tOSP(1.0μs)
3R
R
VOSP
VSD
7.0V
VCC
VOVP
24.5V
LPF
TSD
VSTR
6
Random
ICH
Vref
VCC Good
OSC
PWM
SQ
RQ
LEB (300ns)
VCC Good
SQ
RQ
Figure 2. Internal Block Diagram
VCC Drain
31
7.5V / 12V
Gate
Driver
VAOCP
2 GND
© 2012 Fairchild Semiconductor Corporation
FSL176MRT • Rev. 1.0.0
2
www.fairchildsemi.com

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Pin Configuration
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin #
1
2
3
4F
5
6V
Name
Drain
GND
VCC
B
NC
STR
Description
SenseFET Drain. High-voltage power SenseFET drain connection.
Ground. This pin is the control ground and the SenseFET source.
Power Supply . T his 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 7V, the overload
protection triggers, which shuts down the FPS.
No Connection
Startup. This pin is connected directly, or through a resistor, to the high-voltage DC link.
At startup, the internal high-voltage current source supplies internal bias and charges the
external capacitor connected to the VCC pin. Once VCC reaches 12V, the internal current
source (ICH) is disabled.
© 2012 Fairchild Semiconductor Corporation
FSL176MRT • Rev. 1.0.0
3
www.fairchildsemi.com