FSL138MRT — Green-Mode Fairchild Power Switch (FPS™) for High Input Voltage
FSL138MRT
Green-Mode Fairchild Power Switch (FPS™) for
High Input Voltage
Features
Internal Avalanched-Rugged 800V SenseFET
Advanced Soft Burst-Mode Operation for
Low Standby Power and Low Audible Noise
Under 40mW Standby Power Consumption
at 265V
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 and Under-Voltage
Lockout (UVLO) with Hysteresis
Low Operating Current (0.4mA) in Burst Mode
Internal Startup Circuit
Built-in Soft-Start: 15ms
Auto-Restart Mode
and No-load Condition
AC
Description
The FSL138MRT is an integrated Pulse Width
Modulation (PWM) controller and SenseFET specifically
designed for offline Switched-Mode Power Supplies
(SMPS) with minimal external components. The PWM
controller includes an integrated fixed-frequency
oscillator, Under-Voltage Lockout (UVLO), LeadingEdge 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 FSL138MRT can reduce total
cost, component count, size, and weight; while
simultaneously increasing efficiency, productivity, and
system reliability. This device provides a basic platform
suited for cost-effective design of a flyback converter.
May 2012
Applications
Power Supply for STB Home Appliances and
Industrial for High AC Input
Ordering Information
Operating
Part Number Package
TO-220F
FSL138MRT
Notes:
1. Pb-free package per JEDEC J-STD-020B.
2. The junction temperature can limit the maximum output power.
3. 230V
4. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient temperature.
5. Maximum practical continuous power in an open-frame design at 50°C ambient temperature.
© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSL138MRT • Rev. 1.0.0
AC
6-Lead
W-Forming
or 100/115VAC with voltage doubler.
Junction
Temperature
-40°C ~
+125°C
(1)
Current
2.15A 5 35W 50W 24W 35W
Limit
R
DS(ON)
(Max.)
Adapter
Output Power Table
230VAC ± 15%
Open
(4)
Frame
(3)
85~265VAC
Adapter
(5)
(2)
(4)
Open
Frame
Replaces
Device
(5)
KA5M0380RY
DTU
Application Circuit
AC
IN
FSL138MRT — Green-Mode Fairchild Power Switch (FPS™) for High Input Voltage
V
O
V
STR
Drain
GND
Internal Block Diagram
V
BURST
0.30V / 0.45V
FB
NC 5
V
4
CC
2.0µA
I
DELAY
V
REF
90µA
I
FB
FB
V
CC
Figure 1. Typical Application Circuit
V
STR
6 3
I
CH
3R
Soft-Start
R
Soft-Burst
Random
OSC
PWM
V
SQ
R
LEB(350ns)
REF
Q
VCCGood
V
CC
Gate
Driver
Drain
1
7.5V / 12V
GND
2
V
SD
7.0V
V
CC
V
OVP
24.5V
TSD
VCCGood
SQ
R
Q
V
AOCP
Figure 2. Internal Block Diagram
© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSL138MRT • Rev. 1.0.0 2
Pin Configuration
Pin Definitions
FSL138MRT — Green-Mode Fairchild Power Switch (FPS™) for High Input Voltage
Figure 3. Pin Configuration (Top View)
Pin # Name Description
1 Drain
2 GND
3 VCC
4 FB
5 NC No Connection
6 V
SenseFET Drain. High-voltage power SenseFET drain connection.
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 7V, the overload
protection triggers, which shuts down the FPS.
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
STR
external capacitor connected to the V
source (I
) is disabled.
CH
pin. Once VCC reaches 12V, the internal current
CC
© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSL138MRT • Rev. 1.0.0 3
FSL138MRT — Green-Mode Fairchild Power Switch (FPS™) for High Input Voltage
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol Parameter Min. Max. Unit
V
V
STR
V
Drain Pin Voltage 800 V
DS
V
V
CC
V
FB
I
Drain Current Pulsed
DM
I
Continuous Switching Drain Current 3 A
DS
EAS Single Pulsed Avalanche Energy
PD
T
J
T
STG
Notes:
6. Repetitive peak switching current when the inductive load is assumed: Limited by maximum duty (D
and junction temperature (see Figure 4).
7. L=10mH, starting TJ=25°C.
8. Infinite cooling condition (refer to the SEMI G30-88).
9. Although this parameter guarantees IC operation, it does not guarantee all electrical characteristics.
Pin Voltage 650 V
STR
Pin Voltage 26 V
CC
Feedback Pin Voltage
(6)
12 A
Total Power Dissipation (T
=25°C)
C
Maximum Junction Temperature
Operating Junction Temperature
Storage Temperature
-0.3
(7)
134 mJ
(8)
45 W
150
(9)
-40
-55
10.0 V
+125
+150
MAX
°C
°C
°C
=0.74)
Figure 4. Repetitive Peak Switching Current
ESD Capability
Symbol Parameter Value Unit
ESD
Human Body Model, JESD22-A114 5
Charged Device Model, JESD22-C101 2
KV
Thermal Impedance
TA=25°C unless otherwise specified.
Symbol Parameter Value Unit
JA Junction-to-Ambient Thermal Impedance
JC Junction-to-Case Thermal Impedance
Notes:
10. Free standing without heat sink under natural convection condition, per JEDEC 51-2 and 1-10.
11. Infinite cooling condition per Mil Std. 883C method 1012.1.
© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSL138MRT • Rev. 1.0.0 4
(10)
63.5 °C/W
(11)
2.8 °C/W