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PDF FSL137H Data sheet ( Hoja de datos )
| Número de pieza | FSL137H | |
| Descripción | Green Mode Fairchild Power Switch | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de FSL137H (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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August 2009
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
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
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General-purpose switch-mode power supplies and
flyback power converters, including:
SMPS for VCR, SVR, STB, DVD & DVCD Player,
Printer, Facsimile, & Scanner
Adapter for Camcorder
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 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
Operating
Temperature Range
FSL137HNY 3.0A 700V
-40°C to +105°C
Eco Status
Package
Green
8-Pin Dual In-Line
Package (DIP)
Packing
Method
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
1 page  
Electrical Characteristics
VDD=15V, TA=25°C unless otherwise specified.
Symbol
SenseFET Section(9)
Parameter
BVDSS Drain- Source Breakdown Voltage
Conditions
Min. Typ. Max. Unit
VDS = 700V, VGS = 0V
700
V
IDSS
RDS(ON)
CISS
Zero-Gate-Voltage Drain Current
Drain-Source On-State Resistance(10)
Input Capacitance
VDS = 700V, VGS = 0V
VDS = 560V, VGS = 0V,
TA = 125°C
VGS = 10V, ID = 0.5A
VGS = 0V, VDS = 25V,
f = 1MHz
COSS
Output Capacitance
VGS = 0V, VDS = 25V,
f = 1MHz
CRSS
Reverse Transfer Capacitance
VGS = 0V, VDS = 25V,
f = 1MHz
td(on)
Turn-On Delay Time
tr Rise Time
td(off)
Turn-Off Delay Time
tf Fall Time
Control Section
VDS = 350V, ID = 1.0A
VDS = 350V, ID = 1.0A
VDS = 350V, ID = 1.0A
VDS = 350V, ID = 1.0A
VDD Section
VOP Continuously Operating Voltage
VDD-ON Start Threshold Voltage
VDD-OFF Minimum Operating Voltage
IDD-ST
Startup Current
IDD-OP Operating Supply Current
IDD-BM
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IDD-OLP
Green-Mode Operating Supply
Current
Internal Sink Current
VTH-OLP IDD-OLP Off Voltage
VDD-OVP VDD Over-Voltage Protection
tD-VDDOVP
VDD Over-Voltage Protection
Debounce Time
VDD-ON – 0.16V
VDD=15V, VFB=3V
VFB=VFB-G
VTH-OLP+0.1V
HV Section
IHV Maximum Current Drawn from HV Pin
IHV-LC
Leakage Current After Startup
Oscillator Section
HV 120VDC,
VDD=0V with 10µF
HV=700V,
VDD=VDD-OFF+1V
fOSC
fOSC-G
DMAX
fDV
fDT
Frequency in Nominal Mode
Green-Mode Frequency
Maximum Duty Cycle
Frequency Variation vs. VDD Deviation
Frequency Variation vs. Temperature
Deviation(9)
Center Frequency
VDD=11V to 22V
TA= -40 to +105°C
0.5 50.0
1 200
4.00 4.75
315 410
47 61
9 14
11.2 33.0
34 78
28.2 67.0
32 74
μA
Ω
pF
pF
pF
ns
ns
ns
ns
22 V
11 12 13 V
7 8 9V
30 µA
3.0 3.5 4.0 mA
2.5 mA
30 60 90 µA
5 6 7V
27 28 29 V
75 130 200 µs
1.5 3.5 5.0 mA
1 20 µA
94 100 106 kHz
14 18 22 kHz
85 %
5%
5%
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FSL137H Rev. 1.0.0
5
www.fairchildsemi.com
5 Page 
Constant Power Control
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
Figure 27.Constant Power Control
VIN
Protections
The FSL137H provides full protection functions to
prevent the power supply and the load from being
damaged. The protection features include:
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.
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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.
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
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet FSL137H.PDF ] | |
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