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PDF FSL136MR Data sheet ( Hoja de datos )
| Número de pieza | FSL136MR | |
| Descripción | Green Mode Fairchild Power Switch | |
| Fabricantes | Fairchild Semiconductor | |
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June 2010
FSL136MR
Green Mode Fairchild Power Switch (FPS™)
Features
Internal Avalanche-Rugged SenseFET (650V)
Under 50mW Standby Power Consumption at
265VAC, No-load Condition with Burst Mode
Precision Fixed Operating Frequency with
Frequency Modulation for Attenuating EMI
Internal Startup Circuit
Built-in Soft-Start: 15ms
Pulse-by-Pulse Current Limiting
Various Protections: Over-Voltage Protection
(OVP), Overload Protection (OLP), Output-Short
Protection (OSP), Abnormal Over-Current
Protection (AOCP), Internal Thermal Shutdown
Function with Hysteresis (TSD)
Auto-Restart Mode
Under-Voltage Lockout (UVLO)
Low Operating Current: 1.8mA
Adjustable Peak Current Limit
Applications
SMPS for VCR, STB, DVD, & DVCD Players
SMPS for Home Appliance
Adapter
Related Resources
AN-4137 — Design Guidelines for Off-line Flyback
Converters using FPS™
AN-4141 — Troubleshooting and Design Tips for
Fairchild Power Switch (FPS™) Flyback
Applications
AN-4147 — Design Guidelines for RCD Snubber of
Flyback
Description
The FSL136MR integrated Pulse Width Modulator
(PWM) and SenseFET is specifically designed for high-
performance offline Switch-Mode Power Supplies
(SMPS) with minimal external components. FSL136MR
includes integrated high-voltage power switching
regulators that combine an avalanche-rugged
SenseFET with a current-mode PWM control block.
The integrated PWM controller includes: Under-Voltage
Lockout (UVLO) protection, Leading-Edge Blanking
(LEB), a frequency generator for EMI attenuation, an
optimized gate turn-on/turn-off driver, Thermal
Shutdown (TSD) protection, and temperature-
compensated precision current sources for loop
compensation and fault protection circuitry. The
FSL136MR offers good soft-start performance. When
compared to a discrete MOSFET and controller or RCC
switching converter solution, the FSL136MR reduces
total component count, design size, and weight; while
increasing efficiency, productivity, and system reliability.
This device provides a basic platform that is well suited
for the design of cost-effective flyback converters.
Maximum Output Power(1)
230VAC ± 15%(2)
85-265VAC
Adapter(3)
Open
Frame
Adapter(3)
Open
Frame
19W
26W
14W
20W
Notes:
1. The junction temperature can limit the maximum
output power.
2. 230VAC or 100/115VAC with doubler.
3. Typical continuous power in a non-ventilated
enclosed adapter measured at 50°C ambient.
Ordering Information
Part Number
FSL136MR
Operating
Temperature Range
-40 to +105°C
Top Mark
Package
Packing Method
FSL136MR 8-Lead, Dual Inline Package (DIP)
Rail
© 2009 Fairchild Semiconductor Corporation
FSL136MR • Rev. 1.0.7
www.fairchildsemi.com
1 page  
Electrical Characteristics
TA = 25°C unless otherwise specified.
Symbol
Parameter
Conditions
Min. Typ. Max. Units
SenseFET Section
BVDSS
IDSS
RDS(ON)
CISS
COSS
CRSS
td(ON)
tr
td(OFF)
tf
Drain-Source Breakdown Voltage
Zero Gate Voltage Drain Current
Drain-Source On-State Resistance
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
Turn-On Delay
Rise Time
Turn-Off Delay
Fall Time
Control Section
fOSC
∆fOSC
fFM
DMAX
DMIN
VSTART
VSTOP
IFB
tS/S
Switching Frequency
Switching Frequency Variation
Frequency Modulation
Maximum Duty Cycle
Minimum Duty Cycle
UVLO Threshold Voltage
Feedback Source Current
Internal Soft-Start Time
Burst Mode Section
VBURH
VBURL
VBUR(HYS)
Burst Mode Voltage
Protection Section
ILIM
tCLD
VSD
IDELAY
VOVP
Peak Current Limit
Current Limit Delay Time(11)
Shutdown Feedback Voltage
Shutdown Delay Current
Over-Voltage Protection Threshold
VCC = 0V, ID = 250µA
VDS = 650V, VGS = 0V
VGS = 10V, VGS = 0V, TC = 25°C
VGS = 0V, VDS = 25V, f = 1MHz
VGS = 0V, VDS = 25V, f = 1MHz
VGS = 0V, VDS = 25V, f = 1MHz
VDD = 350V, ID = 3.5A
VDD = 350V, ID = 3.5A
VDD = 350V, ID = 3.5A
VDD = 350V, ID = 3.5A
650
250
3.5 4.0
290
45
5.5
12
22
20
19
V
µA
Ω
pF
pF
pF
ns
ns
ns
ns
VDS = 650V, VGS = 0V
61 67 73 KHz
VGS = 10V, VGS = 0V, TC = 125°C
±5 ±10 %
±3 KHz
VFB = 4V
71 77 83 %
VFB = 0V
0 0 0%
11 12 13
V
After Turn-On
789V
VFB = 0V
320 400 480 µA
VFB = 4V
10 15 20 ms
TJ = 25°C
0.4 0.5 0.6
0.25 0.35 0.45
150
V
V
mV
TJ = 25°C, di/dt = 300mA/µs
VCC = 15V
VFB = 5V
VFB = 2V
1.89 2.15 2.41
200
5.5 6.0 6.5
3.5 5.0 6.5
22.5 24.0 25.5
A
ns
V
µA
V
tOSP
VOSP
tOSP_FB
VAOCP
TSD
HYSTSD
tLEB
Threshold Time
Output-Short
Protection(11)
Threshold Feedback
Voltage
Feedback Blanking
Time
AOCP Voltage(11)
Thermal
Shutdown(11)
Shutdown
Temperature
Hysteresis
Leading-Edge Blanking Time(11)
TJ = 25°C
OSP Triggered When tON<tOSP,
VFB>VOSP and Lasts Longer than
tOSP_FB
TJ = 25°C
1.00 1.35 µs
1.44 1.60
V
2.0 2.5
µs
0.85 1.00 1.15 V
125 137 150 °C
60 °C
300 ns
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FSL136MR • Rev. 1.0.7
5
www.fairchildsemi.com
5 Page 
is lower than 1.0µs, the FPS recognizes this condition
as an abnormal error and shuts down PWM switching
until VCC reaches VSTART again. An abnormal condition
output is shown in Figure 20.
Figure 20. Output Short Waveforms (OSP)
Soft-Start
The FPS has an internal soft-start circuit that slowly
increases the feedback voltage, together with the
SenseFET current, after it starts. The typical soft-start
time is 15ms, as shown in Figure 21, where progressive
increments of the SenseFET current are allowed during
the startup phase. The pulse width to the power
switching device is progressively increased to establish
the correct working conditions for transformers,
inductors, and capacitors. The voltage on the output
capacitors is progressively increased with the intention
of smoothly establishing the required output voltage.
Soft-start helps prevent transformer saturation and
reduce the stress on the secondary diode.
Figure 22. Burst-Mode Operation
Adjusting Peak Current Limit
As shown in Figure 23, a combined 6kΩ internal
resistance is connected to the non-inverting lead on the
PWM comparator. An external resistance of Rx on the
current limit pin forms a parallel resistance with the 6kΩ
when the internal diodes are biased by the main current
source of 400µA. For example, FSL136MR has a typical
SenseFET peak current limit (ILIM) of 2.15A. ILIM can be
adjusted to 1.5A by inserting Rx between the IPK pin and
the ground. The value of the Rx can be estimated by
the following equations:
2.15A:1.5A = 6kΩ: XkΩ
(1)
X = Rx || 6kΩ
(2)
where X is the resistance of the parallel network.
Figure 21. Internal Soft-Start
Burst Operation
To minimize power dissipation in standby mode, the
FPS enters burst mode. As the load decreases, the
feedback voltage decreases. As shown in Figure 22,
the device automatically enters burst mode when the
feedback voltage drops below VBURH. Switching
continues until the feedback voltage drops below VBURL.
At this point, switching stops and the output voltages
drop at a rate dependent on standby current load. This
causes the feedback voltage to rise. Once it passes
VBURH, switching resumes. The feedback voltage then
falls and the process repeats. Burst mode alternately
enables and disables switching of the SenseFET and
reduces switching loss in standby mode.
© 2009 Fairchild Semiconductor Corporation
FSL136MR • Rev. 1.0.7
11
Figure 23. Peak Current Limit Adjustment
www.fairchildsemi.com
11 Page | ||
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| PDF Descargar | [ Datasheet FSL136MR.PDF ] | |
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