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PDF FSL127H Data sheet ( Hoja de datos )
| Número de pieza | FSL127H | |
| Descripción | Green Mode Fairchild Power Switch | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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September 2010
FSL127H
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)
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:
SMPS for VCR, SVR, STB, DVD & VCD Player,
Printer, Facsimile, & Scanner
Adapter for Camcorder
Description
The highly integrated FSL127H consists of a 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. 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
www.DataSPhaerett4NUu.cmomber SenseFET
FSL127HNY 2.0A 700V
Operating
Temperature Range
-40°C to +105°C
Package
Packing Method
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
1 page  
Electrical Characteristics
VDD=15V and TA=25°C unless otherwise specified.
Symbol
SenseFET Section(11)
Parameter
BVDSS Drain- Source Breakdown Voltage
Conditions
VGS = 0V
Min. Typ. Max. Unit
700 V
IDSS
RDS(ON)
CISS
COSS
CRSS
td(on)
tr
td(off)
tf
Zero-Gate-Voltage Drain Current
Drain-Source On-State Resistance(12)
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
Turn-On Delay Time
Rise Time
Turn-Off Delay Time
Fall Time
VDS = 700V, VGS = 0V
VDS = 560V, VGS = 0V,
TA = 125°C
VGS = 10V, ID = 0.5A
VGS = 0V, VDS = 25V,
f = 1MHz
VGS = 0V, VDS = 25V,
f = 1MHz
VGS = 0V, VDS = 25V,
f = 1MHz
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
Green-Mode Operating Supply
Current
VDD-ON – 0.16V
VDD = 15V, VFB = 3V
VFB = VZDC
IDD-OLP
VTH-OLP
VDD-OVP
tD-VDDOVP
Internal Sink Current
IDD-OLP Off Voltage
VDD Over-Voltage Protection
VDD Over-Voltage Protection
Debounce Time
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 Frequency in Nominal Mode
fOSC-G Green-Mode Frequency
www.DataSheeDt4MUAX.com Maximum Duty Cycle
fDV Frequency Variation vs. VDD Deviation
fDT
Frequency Variation vs. Temperature
Deviation(11)
Center Frequency
VDD = 9V to 22V
TA = -40 to +105°C
0.5 50.0
μA
1 200
6.0 7.2
Ω
550 715
pF
38 50 pF
17 26 pF
20 50 ns
15 40 ns
55 120 ns
25 60 ns
22 V
11 12 13 V
7 8 9V
30 µA
3.0 3.5 4.0 mA
2 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…
© 2010 Fairchild Semiconductor Corporation
FSL127H • Rev. 1.0.2
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.
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:
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.
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,
www.DataOShLePeti4sUtr.cigogmered. 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
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet FSL127H.PDF ] | |
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