FAIRCHILD FSL127HNY

FSL127H
Green Mode Fairchild Power Switch (FPS™)
Features
Description
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The highly integrated FSL127H consists of a current
mode Pulse Width Modulator (PWM) and an avalancherugged 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
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 & VCD 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. This
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 FSL127H 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 FSL127H 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 FSL127H 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
Operating
Temperature Range
Package
Packing Method
FSL127HNY
2.0A 700V
-40°C to +105°C
8-Pin Dual In-Line Package (MDIP),
JEDEC MS-001, .300" Wide
Tube
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
FSL127H — Green Mode Fairchild Power Switch (FPS™)
September 2010
HV
Drain
VIN
FB
VDD
GND
Figure 1. Typical Flyback Application
Output Power Table(1)
(2)
Product
230VAC ± 15%
(3)
Adapter
85-265VAC
Open Frame
(4)
(3)
Adapter
Open Frame
(4)
FSL127H
14W
20W
11W
16W
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
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
2
FSL127H — Green Mode Fairchild Power Switch (FPS™)
Application Diagram
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 #
Name
Description
1
GND
Ground. SenseFET source terminal on primary side and internal control 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 current-sense signal on the
SENSE pin.
4
VIN
Line-Voltage Detection. The line-voltage detection is used for constant output power limit. It is
suggested to add a low pass filter to filter out line ripple on bulk capacitor.
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 Dain. High-voltage power SenseFET drain connection.
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
3
FSL127H — 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.
Unit
700
V
IDM
Drain Current Pulsed
8
A
EAS
Single Pulsed Avalanche Energy
140
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
35
°C/W
+150
°C
+150
°C
+260
°C
Junction-to-Top Thermal Resistance
Ψ JT
TJ
(9)
Operating Junction Temperature
TSTG
-55
Storage Temperature Range
TL
Lead Temperature (Wave Soldering or IR, 10 Seconds)
ESD
Electrostatic Discharge Capability,
(10)
All Pins Except HV Pin
Human Body Model:
JESD22-A114
4.5
Charged Device Model:
JESD22-C101
1.5
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.
9. Measured on the package top surface.
10. All pins including HV pin: HBM=500V, CDM=1250V.
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
Min.
Operating Ambient Temperature
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
-40
Typ.
Max.
Unit
+105
°C
www.fairchildsemi.com
4
FSL127H — Green Mode Fairchild Power Switch (FPS™)
Absolute Maximum Ratings
VDD=15V and 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
(11)
Drain-Source On-State Resistance
VGS = 0V
(12)
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
6.0
7.2
Ω
550
715
pF
CISS
Input Capacitance
VGS = 0V, VDS = 25V,
f = 1MHz
COSS
Output Capacitance
VGS = 0V, VDS = 25V,
f = 1MHz
38
50
pF
CRSS
Reverse Transfer Capacitance
VGS = 0V, VDS = 25V,
f = 1MHz
17
26
pF
Turn-On Delay Time
VDS = 350V, ID = 1.0A
20
50
ns
Rise Time
VDS = 350V, ID = 1.0A
15
40
ns
Turn-Off Delay Time
VDS = 350V, ID = 1.0A
55
120
ns
Fall Time
VDS = 350V, ID = 1.0A
25
60
ns
22
V
13
V
td(on)
tr
td(off)
tf
VDD Section
VOP
Continuously Operating Voltage
VDD-ON
Start Threshold Voltage
VDD-OFF
Minimum Operating Voltage
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 = VZDC
IDD-OLP
Internal Sink Current
VTH-OLP+0.1V
11
12
7
8
3.0
3.5
9
V
30
µA
4.0
mA
2
30
60
mA
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
100
106
kHz
18
22
kHz
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
94
14
85
%
fDV
Frequency Variation vs. VDD Deviation
VDD = 9V to 22V
5
%
fDT
Frequency Variation vs. Temperature
(11)
Deviation
TA = -40 to +105°C
5
%
Continued on the following page…
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
5
FSL127H — Green Mode Fairchild Power Switch (FPS™)
Electrical Characteristics
VDD=15V and 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
0.60
0.70
0.80
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
120
0.2
0.3
0.4
V
Feedback Input Section
AV
FB Voltage to Current-Sense Attenuation
ZFB
Input Impedance
VFB-OPEN
VFB-OLP
Output High Voltage
1/4.0
V/V
9.5
kΩ
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
V
2.1
2.3
V
Min.
Typ.
Max.
Unit
PWM Frequency
fOSC
fOSC-G
VFB-ZDC VFB-G
VFB-N
VFB
Figure 4. VFB vs. PWM Frequency
Symbol
Parameter
Conditions
Current-Sense Section
ILIM at VIN = 1.2V
Peak Current Limit
VIN = 1.2V
0.51
0.61
0.71
A
ILIM at VIN = 3.6V
Peak Current Limit
VIN = 3.6V
0.44
0.54
0.64
A
4.5
5.0
5.5
ms
tSS
(11)
Period During Soft-Start Time
Over-Temperature Protection Section (OTP)
TOTP
Protection Junction Temperature
(11,13)
142
°C
Notes:
11. These parameters, although guaranteed, are not 100% tested in production.
12. Pulse test: pulse width ≤ 300μs, duty ≤ 2%.
13. When activated, the output is disabled and the latch is turned off.
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
6
FSL127H — Green Mode Fairchild Power Switch (FPS™)
Electrical Characteristics (Continued)
Figure 5.
IDD-ST vs. Temperature
Figure 7.
VDD-ON vs. Temperature
Figure 8.
Figure 9.
VTH-OLP vs. Temperature
Figure 10. VDD-OVP vs. Temperature
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
Figure 6.
IDD-OP vs. Temperature
VDD-OFF vs. Temperature
www.fairchildsemi.com
7
FSL127H — Green Mode Fairchild Power Switch (FPS™)
Typical Characteristics
Figure 11. IHV vs. Temperature
Figure 12. fOSC vs. Temperature
Figure 13. fOSC-G vs. Temperature
Figure 14. VIN-ON vs. Temperature
Figure 15. VIN-RL vs. Temperature
Figure 16. VIN-H vs. Temperature
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
8
FSL127H — Green Mode Fairchild Power Switch (FPS™)
Typical Characteristics
Figure 17. VIN-L vs. Temperature
Figure 18. VFB-N vs. Temperature
Figure 19. VFB-OLP vs. Temperature
Figure 20. tD-OLP vs. Temperature
Figure 21. VFB-ZDC vs. Temperature
Figure 22. IDD-BM vs. Temperature
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
9
FSL127H — 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 FSL127H 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 FSL127H enters “deep” green
mode to reduce the standby power consumption. As
VFB decreases below VFB-ZDC (2.1V), FSL127H enters
burst-mode operation. When VFB drops below VFB-ZDC,
FSL127H 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.
R HV
CDC
DDD
HV
VDD
NA
C DD
FSL127H
AC line
Figure 23. Startup Circuit
Slope Compensation
FSL127H is designed for flyback power converter. The
peak-current-mode control is used to optimize system
performance. Slope compensation is added to stabilize
the current loop. The FSL127H inserts a synchronized,
positively sloped ramp at each switching cycle.
Soft Start
Figure 25. PWM Frequency
The FSL127H 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 prevent transformer saturation and reduces stress
on the secondary diode during startup.
Figure 24. Soft-Start Function
Figure 26. Burst Mode Operation
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
10
FSL127H — 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.
Figure 27. Constant Power Control
Protections
The FSL127H provides protection functions to prevent
the power supply and the load from being damaged.
The protection features include:
Figure 29. OLP Operation
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 FSL127H 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 level is higher than 4.7V, FSL127H
is latched until the VDD is discharged. FSL127H is in
auto recovery when the VIN level 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.
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
11
FSL127H — Green Mode Fairchild Power Switch (FPS™)
Constant Power Control
Application
Fairchild Devices
Input Voltage Range
Output
Adapter
FSL127H
90~264VAC
12V/0.85A (10.2W)
Features
ƒ
ƒ
ƒ
High efficiency (>76.74% at full load) meeting Energy Star V2.0 regulation with enough margin
Standby power <100mW at no-load condition
Provides full protection functions, including:
OVP
OTP
OLP
VIN-H
VIN-L
Latch
Latch
Auto Restart
Latch
Auto Restart
Figure 30. Measured Standby Power
Figure 31. Over-Current Protection
Figure 32. Schematic of Typical Application Circuit
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
12
FSL127H — Green Mode Fairchild Power Switch (FPS™)
Typical Application Circuit
FSL127H — Green Mode Fairchild Power Switch (FPS™)
Typical Application Circuit (Continued)
Transformer Specification
ƒ
ƒ
Core: EE16
Bobbin: EE16
Figure 33. Transformer Diagram
TERMINAL
NO.
WIRE
Ts
S
F
W1
5
4
2UEW 0.3*1
13
W2
2
1
2UEW 0.26*1
75
W3
4
COPPER SHIELD
1.2
W4
8
TEX-E 0.35*1
13
CORE ROUNDING TAPE
3
10
Primary-Side Inductance=880μH ±5%
Primary-Side Effective Leakage<20μH ±5%
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
13
FSL127H — 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 34. 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/.
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
14
FSL127H — Green Mode Fairchild Power Switch (FPS™)
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
www.fairchildsemi.com
15