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FA5571 Datasheet (HTML) - Fuji Electric

Part No. FA5571
Description  Low Standby Power Quasi-Resonant Controller
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Maker  FUJI [Fuji Electric]
Homepage  http://www.fujielectric.co.jp/eng/fdt/scd
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2009-4
■ Example of power supply configuration
■ Standby power and efficiency (power supply specifications: output power - 19V, rating - 5 A)
■ Comparison between FA5571 series models and conventional models
Conventional models
FA5571 series (new models)
Item
FA5531
FA5532
FA5541
FA5542
FA55771
FA5572
FA5573
FA5574
1 Light-load operation
Frequency reduction
Intermittent operation
Intermittent operation
Frequency reduction
2 Intermittent operation
start FB voltage
0.34V
0.4V
3 Frequency reduction
start FB voltage
1.3V
1.15V
4 Overload operation
Auto recovery Timer latch Auto recovery Timer latch Auto recovery Timer latch Auto recovery Timer latch
5 Reduced current at VH
pin when VCC is shorted
8mA when VCC is shorted
(current-limiting resistor is
required
7.6mA when VCC is shorted
(current-limiting resistor is
required)
Limited VH current when VCC voltage is low
IVH
=1.6mA at VCC=0V
6 OVP detection at ZCD
pin
External latch function
Latched in 48us after pull-up
External latch function
Latched in 48us after pull-up
External latch function: Latched in 57us after pull-up
+ Latch is detected in 2.3us after turnoff
7 Additional IS pin short
protection function
N/A
N/A
2.0V
8 VCC pin UVLO level
9.85V/9.1V
10.2V/9.0V
18V/8V
9 Internal soft start
1ms (only at startup)
1ms (only at startup)
2.6ms (only at startup)
10 OVP detection at VCC
pin
28V
28V
N/A
Input AC Voltage [Vac]
Information in this catalog is subject to change without notice.



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