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PDF FSFR1600L Data sheet ( Hoja de datos )
| Número de pieza | FSFR1600L | |
| Descripción | Power Switch | |
| Fabricantes | Fairchild Semiconductor | |
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June 2010
FSFR-Series — Fairchild Power Switch (FPS™)
for Half-Bridge Resonant Converters
Features
Variable Frequency Control with 50% Duty Cycle
for Half-bridge Resonant Converter Topology
High Efficiency through Zero Voltage Switching (ZVS)
Internal UniFET™s with Fast-Recovery Type Body
Diode (trr<160ns).
Fixed Dead Time (350ns) Optimized for MOSFETs
Up to 300kHz Operating Frequency
Pulse Skipping for Frequency Limit (Programmable)
at Light-Load Condition
Remote On/Off Control Using Control Pin
Protection Functions: Over-Voltage Protection
(OVP), Over-Load Protection (OLP), Over-Current
Protection (OCP), Abnormal Over-Current Protection
(AOCP), Internal Thermal Shutdown (TSD)
Applications
PDP and LCD TVs
Desktop PCs and Servers
Adapters
Telecom Power Supplies
Audio Power Supplies
Description
The FSFR-series include highly integrated power
switches designed for high-efficiency half-bridge
resonant converters. Offering everything necessary to
build a reliable and robust resonant converter, the FSFR-
series simplifies designs and improves productivity, while
improving performance. The FSFR-series combines
power MOSFETs with fast-recovery type body diodes, a
high-side gate-drive circuit, an accurate current
controlled oscillator, frequency limit circuit, soft-start, and
built-in protection functions. The high-side gate-drive
circuit has a common-mode noise cancellation capability,
which guarantees stable operation with excellent noise
immunity. The fast-recovery body diode of the MOSFETs
improves reliability against abnormal operation
conditions, while minimizing the effect of the reverse
recovery. Using the zero-voltage-switching (ZVS)
technique dramatically reduces the switching losses and
efficiency is significantly improved. The ZVS also
reduces the switching noise noticeably, which allows a
small-sized Electromagnetic Interference (EMI) filter.
The FSFR-series can be applied to various resonant
converter topologies, such as: series resonant, parallel
resonant, and LLC resonant converters.
Related Resources
AN-4151 — Half-Bridge LLC Resonant Converter Design
Using FSFR-Series Fairchild Power Switch (FPS™)
Ordering Information
Part
Number
Package
Operating
Junction
RDS(ON_MAX)
Temperature
Maximum Output Power
without Heatsink
(VIN=350~400V) (1,2)
FSFR2100U
0.51Ω
180W
FSFR2000
0.67Ω
160W
FSFR1900
FSFR1800
9-SIP
0.85Ω
0.95Ω
140W
120W
FSFR1700
-40 to +130°C
1.25Ω
100W
FSFR1600
1.55Ω
80W
FSFR1800L
0.95Ω
120W
FSFR1700L 9-SIP(L-Forming)
1.25Ω
100W
FSFR1600L
1.55Ω
80W
Notes:
1. The junction temperature can limit the maximum output power.
2. Maximum practical continuous power in an open-frame design at 50°C ambient.
© 2007 Fairchild Semiconductor Corporation
FSFR series Rev.1.0.9
Maximum Output
Power with Heatsink
(VIN=350~400V)(1,2)
400W
350W
300W
260W
200W
160W
260W
200W
160W
www.fairchildsemi.com
1 page  
Absolute Maximum Ratings (Continued)
Symbol
Parameter
Min.
Max.
Unit
MOSFET Section (Continued)
ID Continuous Drain Current
Package Section
FSFR2100U
FSFR2000
FSFR1900
FSFR1800
FSFR1700
FSFR1600
TC=25°C
TC=100°C
TC=25°C
TC=100°C
TC=25°C
TC=100°C
TC=25°C
TC=100°C
TC=25°C
TC=100°C
TC=25°C
TC=100°C
10.5
6.5
9.5
6.0
8.0
5.0
A
7.0
4.5
6.0
3.9
4.5
2.7
Torque Recommended Screw Torque
5~7 kgf·cm
Notes:
3. Per MOSFET when both MOSFETs are conducting.
4. The maximum value of the recommended operating junction temperature is limited by thermal shutdown.
5. Pulse width is limited by maximum junction temperature.
Thermal Impedance
TA=25°C unless otherwise specified.
Symbol
Parameter
θJC
Junction-to-Case Center Thermal Impedance
(Both MOSFETs Conducting)
FSFR2100U
FSFR2000
FSFR1900
FSFR1800
FSFR1700
FSFR1600
Value
10.44
10.44
10.56
10.68
10.79
10.89
Unit
ºC/W
© 2007 Fairchild Semiconductor Corporation
FSFR series Rev.1.0.9
5
www.fairchildsemi.com
5 Page 
in Figure 19. FSFR-series also has an internal soft-start
for 3ms to reduce the current overshoot during the initial
cycles, which adds 40kHz to the initial frequency of the
external soft-start circuit, as shown in Figure 20. The
initial frequency of the soft-start is given as:
f ISS = (5.2kΩ + 5.2kΩ) ×100 + 40 (kHz)
Rmin
RSS
(3)
It is typical to set the initial frequency of soft-start two ~
three times the resonant frequency (fO) of the resonant
network.
The soft-start time is three to four times of the RC time
constant. The RC time constant is as follows:
TSS = RSS ⋅ CSS
(4)
fs
f ISS
40kHz
Control loop
take over
time
Figure 20. Frequency Sweeping of Soft-start
4. Control Pin: The FSFR-series has a control pin for
protection, cycle skipping, and remote on/off. Figure 21
shows the internal block diagram for control pin.
Figure 22. Control Pin Configuration for
Pulse Skipping
Remote On / Off: When an auxiliary power supply is
used for standby, the main power stage using FSFR-
series can be shut down by pulling down the control pin
voltage, as shown in Figure 23. R1 and C1 are used to
ensure soft-start when switching resumes.
FPS
RT
Rmin
R1
C1
OP1
Main
Output
Main Off
Aux
Output
CON
OP1
Figure 23. Remote On / Off Circuit
Figure 21. Internal Block of Control Pin
Protection: When the control pin voltage exceeds 5V,
protection is triggered. Detailed applications are
described in the protection section.
Pulse Skipping: FSFR-series stops switching when the
control pin voltage drops below 0.4V and resumes
switching when the control pin voltage rises above 0.6V.
To use pulse-skipping, the control pin should be
connected to the opto-coupler collector pin. The
frequency that causes pulse skipping is given as:
SKIP = 5.2k + 4.16k x100(kHz)
R min R max
(5)
4. Current Sensing Method
Current Sensing Using Resistor: FSFR-series senses
drain current as a negative voltage, as shown in Figure
24 and Figure 25. Half-wave sensing allows low power
dissipation in the sensing resistor, while full-wave
sensing has less switching noise in the sensing signal.
© 2007 Fairchild Semiconductor Corporation
FSFR series Rev.1.0.9
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet FSFR1600L.PDF ] | |
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