FA5571 Datasheet, PDF (2/2 Pages) Fuji Electric – Low Standby Power Quasi-Resonant Controller

■ Example of power supply configuration
■ Standby power and efficiency (power supply specifications: output power - 19V, rating - 5 A)
Input AC Voltage [Vac]
■ 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
―
0.34V
0.4V
―
start FB voltage
3 Frequency reduction
1.3V
―
start FB voltage
―
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 8mA when VCC is shorted 7.6mA when VCC is shorted
pin when VCC is shorted (current-limiting resistor is (current-limiting resistor is
required
required)
Limited VH current when VCC voltage is low
IVH＝1.6mA at VCC＝0V
6 OVP detection at ZCD External latch function
External latch function
pin
Latched in 48us after pull-up 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
N/A
N/A
2.0V
protection function
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
28V
28V
N/A
pin
Information in this catalog is subject to change without notice.
2009-4