FSL137H — Green Mode Fairchild Power Switch (FPS™)
September 2010
FSL137H
Green Mode Fairchild Power Switch (FPS™)
Features
Built-in 5ms Soft-Start Function
Internal Avalanche Rugged 700V SenseFET
Low Audio Noise
High-Voltage Startup
Fixed PWM Frequency at 100KHz
Linearly Decreasing PWM Frequency to 18KHz
Peak-Current-Mode Control
Cycle-by-Cycle Current Limiting
Leading-Edge Blanking (LEB)
Synchronized Slope Compensation
Internal Open-loop Protection (OLP)
V
DD
Under-Voltage Lockout (UVLO)
V
DD
Over-Voltage Protection (OVP)
Constant Power Limit (Full AC Input Range)
Internal OTP Sensor with Hysteresis
Description
The highly integrated FSL137H consists of an
integrated current mode Pulse Width Modulator (PWM)
and an avalanche-rugged 700V SenseFET. It is
specifically designed for high-performance offline
Switch Mode Power Supplies (SMPS) with minimal
external components.
The integrated PWM controller features include a
proprietary green-mode function that provides off-time
modulation to linearly decrease the switching frequency
at light-load conditions to minimize standby power
consumption. To avoid acoustic noise problems, the
minimum PWM frequency is set above 18KHz. The
green-mode function enables the power supply to meet
international power conservation requirements. With the
internal high-voltage startup circuitry, the power loss
due to bleeding resistors is also eliminated. To further
reduce power consumption, the PWM controller is
manufactured using the BiCMOS process, which allows
an operating current of only 3.5mA.
The FSL137H built-in synchronized slope compensation
achieves stable peak-current-mode control. The
proprietary external line compensation ensures
constant output power limit over a wide AC input
voltage range, from 90V
AC
to 264V
AC
.
The FSL137H provides many protection functions. In
addition to cycle-by-cycle current limiting, the internal
open-loop protection circuit ensures safety when an
open-loop or output short-circuit failure occurs. PWM
output is disabled until V
DD
drops below the UVLO lower
limit, when the controller starts up again. As long as V
DD
exceeds ~28V, the internal OVP circuit is triggered.
Compared to a discrete MOSFET and controller or RCC
switching converter solution, the FSL137H reduces total
component count, design size, and weight while
increasing efficiency, productivity, and system reliability.
These devices provide a basic platform well suited for
design of cost-effective flyback converters.
Applications
General-purpose switch-mode power supplies and
flyback power converters, including:
SMPS for VCR, SVR, STB, DVD & VCD Player,
Printer, Facsimile, & Scanner
Adapter for Camcorder
Ordering Information
Part Number SenseFET
FSL137HNY
3.0A 700V
Operating Temperature
Range
-40°C to +105°C
Package
8-Pin Dual In-Line Package (DIP)
Packing
Method
Tube
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.3
www.fairchildsemi.com
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Application Diagram
HV
Drain
VIN
FB
VDD
GND
Figure 1. Typical Flyback Application
Output Power Table
Product
(1)
230V
AC
± 15%
Adapter
(3)
(2)
(4)
85-265V
AC
Adapter
(3)
Open Frame
Open Frame
(4)
FSL137H
17.5W
25W
13W
19W
Notes:
1. The maximum output power can be limited by junction temperature.
2. 230 V
AC
or 100/115 V
AC
with doublers.
3. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sink,
at T
A
=50°C ambient.
4. Maximum practical continuous power in an open-frame design with sufficient drain pattern as a heat sink,
at T
A
=50°C ambient.
Internal Block Diagram
Figure 2. Internal Block Diagram
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.3
www.fairchildsemi.com
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Pin Configuration
F
–
Fairchild Logo
Z – Plant Code
X – 1-Digit Year Code
Y – 1-Digit Week Code
TT – 2-Digit Die Run Code
T – Package Type (N: DIP)
P – Y: Green Package
M – Manufacture Flow Code
Figure 3. Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
GND
VDD
FB
VIN
HV
Drain
Drain
Drain
Description
Ground.
SenseFET source terminal on primary side and internal controller ground.
Power Supply.
The internal protection circuit disables PWM output as long as V
DD
exceeds the
OVP trigger point.
Feedback.
The signal from the external compensation circuit is fed into this pin. The PWM duty
cycle is determined in response to the signal on this pin and the internal current-sense signal.
Line-Voltage Detection.
The line-voltage detection is used for brownout protection with
hysteresis and constant output power limit over universal AC input range. This pin has additional
protections that are pull-HIGH latch and pull-low auto recovery, depending on the application.
Startup.
For startup, this pin is pulled HIGH to the line input or bulk capacitor via resistors.
SenseFET Drain.
High-voltage power SenseFET drain connection.
SenseFET Drain.
High-voltage power SenseFET drain connection.
SenseFET Drain.
High-voltage power SenseFET drain connection.
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.3
www.fairchildsemi.com
3
FSL137H — Green Mode Fairchild Power Switch (FPS™)
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
V
DRAIN
I
DM
E
AS
V
VDD
V
FB
V
VIN
V
HV
P
D
θ
JA
Ψ
JT
T
J
T
STG
T
L
ESD
Drain Pin Voltage
(5, 6)
(7)
Parameter
Drain Current Pulsed
DC Supply Voltage
FB Pin Input Voltage
VIN Pin Input Voltage
HV Pin Input Voltage
Power Dissipation (T
A
＜50°C)
Junction-to-Air Thermal Resistance
Junction-to-Top Thermal Resistance
Operating Junction Temperature
Storage Temperature Range
Lead Temperature (Wave Soldering or IR, 10 Seconds)
Electrostatic Discharge Capability, Human Body Model: JESD22-A114
(10)
All Pins Except HV Pin
Charged Device Model: JESD22-C101
(9)
Min.
Max.
700
12
Unit
V
A
mJ
V
V
V
V
W
°C/W
°C/W
°C
°C
°C
kV
Single Pulsed Avalanche Energy
(8)
230
30
-0.3
-0.3
7.0
7.0
700
1.5
80
35
+150
-55
150
+260
4.5
1.5
Notes:
5. All voltage values, except differential voltages, are given with respect to the network ground terminal.
6. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
7. Non-repetitive rating: Pulse width is limited by maximum junction temperature.
8. L = 51mH, starting T
J
= 25°C.
9. Measured on the package top surface.
10. All pins including HV pin: HBM=1kV, CDM=1.25kV
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol
T
A
Parameter
Operating Ambient Temperature
Conditions
Min.
-40
Typ.
Max.
+105
Unit
°C
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.3
www.fairchildsemi.com
4
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Electrical Characteristics
V
DD
=15V, T
A
=25°C unless otherwise specified.
Symbol
SenseFET Section
BV
DSS
(11)
Parameter
Conditions
Min.
Typ.
Max.
Unit
Drain-Source Breakdown Voltage
V
GS
= 0V
V
DS
= 700V, V
GS
= 0V
700
0.5
1
4.00
315
47
9
11.2
34
28.2
32
50.0
V
I
DSS
R
DS(ON)
C
ISS
C
OSS
C
RSS
t
d(on)
t
r
t
d(off)
t
f
V
DD
Section
V
OP
V
DD-ON
V
DD-OFF
I
DD-ST
I
DD-OP
I
DD-BM
I
DD-OLP
V
TH-OLP
V
DD-OVP
t
D-VDDOVP
HV Section
I
HV
I
HV-LC
Zero-Gate-Voltage Drain Current
Drain-Source On-State Resistance
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
Turn-On Delay Time
Rise Time
Turn-Off Delay Time
Fall Time
Continuously Operating Voltage
Start Threshold Voltage
Minimum Operating Voltage
Startup Current
Operating Supply Current
Green-Mode Operating Supply
Current
Internal Sink Current
I
DD-OLP
Off Voltage
V
DD
Over-Voltage Protection
V
DD
Over-Voltage Protection
Debounce Time
(12)
V
DS
= 560V, V
GS
= 0V,
T
A
= 125°C
V
GS
= 10V, I
D
= 0.5A
V
GS
= 0V, V
DS
= 25V,
f = 1MHz
V
GS
= 0V, V
DS
= 25V,
f = 1MHz
V
GS
= 0V, V
DS
= 25V,
f = 1MHz
V
DS
= 350V, I
D
= 1.0A
V
DS
= 350V, I
D
= 1.0A
V
DS
= 350V, I
D
= 1.0A
V
DS
= 350V, I
D
= 1.0A
μA
200
4.75
410
61
14
33.0
78
67.0
74
22
11
7
12
8
3.5
2
30
5
27
75
60
6
28
130
90
7
29
200
13
9
30
3.0
4.0
Ω
pF
pF
pF
ns
ns
ns
ns
V
V
V
µA
mA
mA
µA
V
V
µs
V
DD-ON
– 0.16V
V
DD
= 15V, V
FB
= 3V
V
FB
= V
FB-G
V
TH-OLP
+0.1V
Maximum Current Drawn from HV Pin
Leakage Current After Startup
HV 120V
DC
,
V
DD
= 0V with 10µF
HV = 700V,
V
DD
= V
DD-OFF
+1V
Center Frequency
1.5
3.5
1
5.0
20
mA
µ
A
Oscillator Section
f
OSC
f
OSC-G
D
MAX
f
DV
f
DT
Frequency in Nominal Mode
Green-Mode Frequency
Maximum Duty Cycle
Frequency Variation vs. V
DD
Deviation
Frequency Variation vs. Temperature
(11)
Deviation
V
DD
= 9V to 22V
T
A
= -40 to +105°C
94
14
100
18
85
5
5
106
22
kHz
kHz
%
%
%
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.3
www.fairchildsemi.com
5
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