FAIRCHILD FSL137HNY

FSL137H
Green Mode Fairchild Power Switch (FPS™)
Features
Description
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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.
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
GATE Output Maximum Voltage Clamp (18V)
Internal Open-loop Protection (OLP)
VDD Under-Voltage Lockout (UVLO)
VDD Over-Voltage Protection (OVP)
Constant Power Limit (Full AC Input Range)
Internal OTP Sensor with Hysteresis
Applications
General-purpose switch-mode power supplies and
flyback power converters, including:
ƒ
SMPS for VCR, SVR, STB, DVD & DVCD Player,
Printer, Facsimile, & Scanner
ƒ
Adapter for Camcorder
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 90VAC to 264VAC.
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 VDD drops below the UVLO lower
limit, when the controller starts up again. As long as VDD
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.
Ordering Information
Part Number SenseFET
FSL137HNY
3.0A 700V
Operating
Temperature Range
-40°C to +105°C
Eco Status
Green
Package
Packing
Method
8-Pin Dual In-Line
Package (DIP)
Tube
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
www.fairchildsemi.com
FSL137H — Green Mode Fairchild Power Switch (FPS™)
August 2009
HV
Drain
VIN
FB
VDD
GND
Figure 1. Typical Flyback Application
Output Power Table(1)
(2)
Product
230VAC ± 15%
(3)
Adapter
Open Frame
85-265VAC
(4)
(3)
Adapter
Open Frame
(4)
FSL137H
17.5W
25W
13W
19W
Notes:
1. The maximum output power can be limited by junction temperature.
2. 230 VAC or 100/115 VAC with doublers.
3. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sink,
at TA=50°C ambient.
4. Maximum practical continuous power in an open-frame design with sufficient drain pattern as a heat sink,
at TA=50°C ambient.
Internal Block Diagram
Figure 2. Internal Block Diagram
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.1
www.fairchildsemi.com
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Application Diagram
8
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
ZXYTT
BH0X70
L137H
TPM
1
Figure 3. Pin Configuration
Pin Definitions
Pin #
Name
Description
1
GND
Ground. SenseFET source terminal on primary side and internal controller ground.
2
VDD
Power Supply. The internal protection circuit disables PWM output as long as VDD exceeds the
OVP trigger point.
3
FB
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.
4
VIN
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.
5
HV
Startup. For startup, this pin is pulled HIGH to the line input or bulk capacitor via resistors.
6
Drain
SenseFET Drain. High-voltage power SenseFET drain connection.
7
Drain
SenseFET Drain. High-voltage power SenseFET drain connection.
8
Drain
SenseFET Drain. High-voltage power SenseFET drain connection.
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
www.fairchildsemi.com
3
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Pin Configuration
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
VDRAIN
Parameter
Drain Pin Voltage
Min.
(5, 6)
(7)
Max.
Units
700
V
IDM
Drain Current Pulsed
12
A
EAS
Single Pulsed Avalanche Energy
230
mJ
VVDD
DC Supply Voltage
30
V
(8)
VFB
FB Pin Input Voltage
-0.3
7.0
V
VVIN
VIN Pin Input Voltage
-0.3
7.0
V
VHV
HV Pin Input Voltage
700
V
PD
Power Dissipation (TA<50°C)
1.5
W
θJA
Junction-to-Air Thermal Resistance
80
°C/W
θJC
Junction-to-Case Thermal Resistance
20
°C/W
TJ
Operating Junction Temperature
TSTG
TL
ESD
Internally Limited
Storage Temperature Range
-55
Lead Temperature (Wave Soldering or IR, 10 Seconds)
Electrostatic Discharge Capability,
All Pins Except HV Pin
°C
+150
°C
+260
°C
Human Body Model: JESD22-A114
4
Charged Device Model: JESD22-C101
1
kV
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 TJ = 25°C.
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
TA
Parameter
Conditions
Operating Ambient Temperature
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
Min.
-40
Typ.
Max.
Unit
+105
°C
www.fairchildsemi.com
4
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Absolute Maximum Ratings
VDD=15V, TA=25°C unless otherwise specified.
Symbol
Parameter
SenseFET Section
BVDSS
Drain- Source Breakdown Voltage
IDSS
Zero-Gate-Voltage Drain Current
RDS(ON)
Conditions
Min.
Typ.
Max.
Unit
(9)
Drain-Source On-State Resistance
VDS = 700V, VGS = 0V
(10)
700
V
VDS = 700V, VGS = 0V
0.5
50.0
VDS = 560V, VGS = 0V,
TA = 125°C
1
200
μA
VGS = 10V, ID = 0.5A
4.00
4.75
Ω
315
410
pF
CISS
Input Capacitance
VGS = 0V, VDS = 25V,
f = 1MHz
COSS
Output Capacitance
VGS = 0V, VDS = 25V,
f = 1MHz
47
61
pF
CRSS
Reverse Transfer Capacitance
VGS = 0V, VDS = 25V,
f = 1MHz
9
14
pF
Turn-On Delay Time
VDS = 350V, ID = 1.0A
11.2
33.0
ns
Rise Time
VDS = 350V, ID = 1.0A
34
78
ns
Turn-Off Delay Time
VDS = 350V, ID = 1.0A
28.2
67.0
ns
Fall Time
VDS = 350V, ID = 1.0A
32
74
ns
22
V
td(on)
tr
td(off)
tf
Control Section
VDD Section
VOP
Continuously Operating Voltage
VDD-ON
Start Threshold Voltage
11
12
13
V
VDD-OFF
Minimum Operating Voltage
7
8
9
V
30
µA
4.0
mA
IDD-ST
Startup Current
VDD-ON – 0.16V
IDD-OP
Operating Supply Current
VDD=15V, VFB=3V
IDD-BM
Green-Mode Operating Supply
Current
VFB=VFB-G
IDD-OLP
Internal Sink Current
VTH-OLP+0.1V
30
60
90
µA
VTH-OLP
IDD-OLP Off Voltage
5
6
7
V
VDD-OVP
VDD Over-Voltage Protection
27
28
29
V
tD-VDDOVP
VDD Over-Voltage Protection
Debounce Time
75
130
200
µs
1.5
3.5
5.0
mA
1
20
µA
94
100
106
kHz
14
18
22
kHz
3.0
3.5
2.5
mA
HV Section
IHV
IHV-LC
Maximum Current Drawn from HV Pin
HV 120VDC,
VDD=0V with 10µF
Leakage Current After Startup
HV=700V,
VDD=VDD-OFF+1V
Oscillator Section
fOSC
Frequency in Nominal Mode
fOSC-G
Green-Mode Frequency
DMAX
Maximum Duty Cycle
Center Frequency
85
%
fDV
Frequency Variation vs. VDD Deviation
VDD=11V to 22V
5
%
fDT
Frequency Variation vs. Temperature
(9)
Deviation
TA= -40 to +105°C
5
%
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
www.fairchildsemi.com
5
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Electrical Characteristics
VDD=15V, TA=25°C unless otherwise specified.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
VIN Section
VIN-ON
PWM Turn-on Threshold Voltage
0.98
1.03
1.08
V
VIN-RL
Release Latch Voltage
0.65
0.70
0.75
V
VIN-H
Pull HIGH Latch Trigger Level
4.4
4.7
5.0
V
tIN-H
Pull HIGH Latch Debounce Time
VIN-L
Pull LOW Auto Recovery Trigger Level
µs
100
0.2
0.3
V
0.4
Feedback Input Section
AV
ZFB
VFB-OPEN
VFB-OLP
FB Voltage to Current-Sense Attenuation
1/4.0
V/V
9
kΩ
Input Impedance
Output High Voltage
5
V
FB Open-Loop Trigger Level
4.4
4.6
4.8
V
tD-OLP
Delay Time of FB Pin Open-loop
Protection
50
56
59
ms
VFB-N
Green-Mode Entry FB Voltage
2.3
2.5
2.7
V
VFB-G
Green-Mode Ending FB Voltage
VFB-ZDC
VFB-N 0.1
Zero Duty Cycle FB Voltage
1.9
2.1
V
2.3
V
PWM Frequency
fOSC
fOSC-G
VFB-ZDC VFB-G
VFB-N
VFB
Figure 4. VFB vs. PWM Frequency
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
Current-Sense Section
ILIM at VIN=1.2V
ILIM at VIN=3.6V
tSS
Peak Current Limit
VIN=1.2V
Peak Current Limit
0.8
VIN=3.6V
(9)
Period during Soft Startup Time
A
0.65
4.5
5.0
A
5.5
ms
Over-Temperature Protection Section (OTP)
TOTP
Protection Junction Temperature
(9, 11)
142
°C
Notes:
9. These parameters, although guaranteed, are not 100% tested in production.
10. Pulse test: pulse width ≤ 300μs, duty ≤ 2%.
11. When activated, the output is disabled and the latch is turned off.
12. These parameters, although guaranteed, are tested in wafer process.
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
www.fairchildsemi.com
6
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Electrical Characteristics (Continued)
4.2
11.4
10.4
4
IDD-OP (mA)
IDD-ST (μA)
9.4
8.4
7.4
3.8
3.6
6.4
3.4
5.4
4.4
3.2
-40
-25
-10
5
20
35
50
65
80
95
110
-40
125
-25
-10
5
T emperature (℃ )
35
50
65
80
95
110
125
110
125
110
125
Figure 6. IDD-OP vs. Temperature
12.3
8.1
12.1
8.05
11.9
8
V DD-OFF (V)
V DD-ON (V)
Figure 5. IDD-ST vs. Temperature
11.7
11.5
11.3
7.95
7.9
7.85
11.1
7.8
-40
-25
-10
5
20
35
50
65
80
95
110
125
-40
-25
-10
5
T emperature (℃ )
20
35
50
65
80
95
T emperature (℃ )
Figure 7. VDD-ON vs. Temperature
Figure 8. VDD-OFF vs. Temperature
7
28.4
6.5
28.2
V DD-OVP (V)
V TH-OLP (V)
20
T emperature (℃ )
6
5.5
5
28
27.8
27.6
4.5
27.4
-40
-25
-10
5
20
35
50
65
80
95
110
125
-40
T emperature (℃ )
-10
5
20
35
50
65
80
95
T emperature (℃ )
Figure 9. VTH-OLP vs. Temperature
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
-25
Figure 10.VDD-OVP vs. Temperature
www.fairchildsemi.com
7
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Typical Characteristics
107
5
4.5
105
F OSC (KHz)
IHV (mA)
4
3.5
3
103
101
99
2.5
2
97
-40
-25
-10
5
20
35
50
65
80
95
110
-40
125
-25
-10
5
T emperature (℃ )
Figure 11.IHV vs. Temperature
35
50
65
80
95
110
125
95
110
125
110
125
Figure 12.fOSC vs. Temperature
1.08
20
19.5
1.06
19
V IN-ON (V)
F OSC-G (KHz)
20
T emperature (℃ )
18.5
1.04
1.02
18
1
17.5
17
0.98
-40
-25
-10
5
20
35
50
65
80
95
110
-40
125
-25
-10
5
T emperature (℃ )
20
35
50
65
80
T emperature (℃ )
Figure 13.fOSC-G vs. Temperature
Figure 14.VIN-ON vs. Temperature
0.74
5
4.9
0.72
V IN-H (V)
V IN-RL (V)
4.8
0.7
0.68
4.7
4.6
0.66
4.5
0.64
4.4
-40
-25
-10
5
20
35
50
65
80
95
110
125
-40
T emperature (℃ )
-10
5
20
35
50
65
80
95
T emperature (℃ )
Figure 15.VIN-RL vs. Temperature
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
-25
Figure 16.VIN-H vs. Temperature
www.fairchildsemi.com
8
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Typical Characteristics
3
0.32
2.8
V FB-N (V)
V IN-L (V)
0.34
0.3
0.28
0.26
2.6
2.4
2.2
0.24
2
-40
-25
-10
5
20
35
50
65
80
95
110
125
-40
-25
-10
5
T emperature (℃ )
35
50
65
80
95
110
125
110
125
110
125
Figure 18.VFB-N vs. Temperature
5
57
4.8
56
tD-OLP (ms)
V FB-OLP (V)
Figure 17.VIN-L vs. Temperature
4.6
4.4
4.2
55
54
53
4
52
-40
-25
-10
5
20
35
50
65
80
95
110
125
-40
-25
-10
5
20
T emperature (℃ )
35
50
65
80
95
T emperature (℃ )
Figure 19.VFB-OLP vs. Temperature
Figure 20.tD-OLP vs. Temperature
2.6
2.2
2.4
2.15
IDD-BM (mA)
V FB-ZDC (V)
20
T emperature (℃ )
2.2
2
2.1
2.05
2
1.8
1.95
1.6
-40
-25
-10
5
20
35
50
65
80
95
110
-40
125
Figure 21.VFB-ZDC vs. Temperature
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
-25
-10
5
20
35
50
65
80
95
V DD (V)
T emperature (℃ )
Figure 22.IDD-BM vs. Temperature
www.fairchildsemi.com
9
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Typical Characteristics
Startup Operation
Green-Mode Operation
For startup, the HV pin is connected to the line input or
bulk capacitor through the external resistor, RHV, as
shown in Figure 23. Typical startup current drawn from
the HV pin is 3.5mA and it charges the VDD capacitor
through the resistor RHV. The startup current turns off
when the VDD capacitor voltage reaches VDD-ON. The
VDD capacitor maintains VDD until the auxiliary winding
of the transformer provides the operating current.
The FSL137H uses feedback voltage (VFB) as an
indicator of the output load and modulates the PWM
frequency, as shown in Figure 25, such that the
switching frequency decreases as load decreases. In
heavy load conditions, the switching frequency is
100kHz. Once VFB decreases below VFB-N (2.5V), the
PWM frequency starts to linearly decrease from 100kHz
to 18kHz to reduce the switching losses. As VFB
decreases below VFB-G (2.4V), the switching frequency
is fixed at 18kHz and FSL137H enters into “deep” green
mode to reduce the standby power consumption. As
VFB decreases below VFB-ZDC (2.1V), FSL137H enters
into burst-mode operation. When VFB drops below VFBZDC, FSL137H stops switching and the output voltage
starts to drop, which causes the feedback voltage to
rise. Once VFB rises above VFB-ZDC, switching resumes.
Burst mode alternately enables and disables switching,
thereby reducing switching loss to improve power
saving, as shown in Figure 26.
Figure 23.Startup Circuit
Slope Compensation
FSL137H is designed for flyback power converters. The
peak-current-mode control is used to optimize system
performance. Slope compensation is added to stabilize
the current loop. FSL137H inserts a synchronized,
positively sloped ramp at each switching cycle.
Soft Start
The FSL137H has internal soft-start circuit that slowly
increases the SenseFET current after startup. The
typical soft-start time is 5ms during which the VLimit level
is increased in six steps to smoothly establish the
required output voltage, as shown in Figure 24. It also
helps to prevent transformer saturation and reduce the
stress on the secondary diode during startup.
Figure 25. PWM Frequency
Figure 24.Soft-Start Function
Figure 26.Burst Mode Operation
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
www.fairchildsemi.com
10
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Functional Description
To limit the output power of the converter constantly,
high/low line compensation is included. Sensing the
converter input voltage through the VIN pin, the
high/low line compensation function generates a
relative peak-current-limit threshold voltage for constant
power control, as shown in Figure 27.
VLimit
0.80
0.65
0.5
1.2
3.6 4.0
VIN
Figure 27.Constant Power Control
Protections
Figure 29.OLP Operation
The FSL137H provides full protection functions to
prevent the power supply and the load from being
damaged. The protection features include:
VDD Over-Voltage Protection (OVP)
VDD over-voltage protection prevents IC damage caused
by over voltage on the VDD pin. The OVP is triggered
when VDD reaches 28V. It has a debounce time (typically
130µs) to prevent false trigger by switching noise.
Latch/Auto Recovery Function
The FSL137H provides additional protections by the
VIN pin, such as pull-HIGH latch and pull-LOW auto
recovery that depend on the application. As shown in
Figure 28, when VIN is higher than 4.7V, FSL137H is
latched until the VDD is discharged. FSL137H is in auto
recovery when VIN is lower than 0.3V.
Over-Temperature Protection (OTP)
The SenseFET and the control IC are integrated,
making it easier to detect the temperature of the
SenseFET.
When
the
temperature
exceeds
approximately 142°C, thermal shutdown is activated.
Figure 28.VIN Pin Function
Open-Loop / Overload Protection (OLP)
When the upper branch of the voltage divider for the
shunt regulator (KA431 shown) is broken, as shown in
Figure 29, or over current or output short occurs. There
is no current flowing through the opto-coupler transistor,
which pulls up the feedback voltage to 6V. When the
feedback voltage is above 4.6V for longer than 56ms,
OLP is triggered. This protection is also triggered when
the SMPS output drops below the nominal value longer
than 56ms due to the overload condition.
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
www.fairchildsemi.com
11
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Constant Power Control
FSL137H — Green Mode Fairchild Power Switch (FPS™)
Physical Dimensions
9.83
9.00
6.67
6.096
8.255
7.61
3.683
3.20
5.08 MAX
7.62
0.33 MIN
3.60
3.00
(0.56)
2.54
0.56
0.355
0.356
0.20
9.957
7.87
1.65
1.27
7.62
NOTES: UNLESS OTHERWISE SPECIFIED
A) THIS PACKAGE CONFORMS TO
JEDEC MS-001 VARIATION BA
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS ARE EXCLUSIVE OF BURRS,
MOLD FLASH, AND TIE BAR EXTRUSIONS.
D) DIMENSIONS AND TOLERANCES PER
ASME Y14.5M-1994
E) DRAWING FILENAME AND REVSION: MKT-N08FREV2.
Figure 30.8-Pin Dual In-Line Package (DIP)
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify
or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically
the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
www.fairchildsemi.com
12
FSL137H — Green Mode Fairchild Power Switch (FPS™)
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
www.fairchildsemi.com
13