Quasi-Resonant IC FA5530/31/32
Features Features
• Internal start-up circuit with 500V rating and low frequency operatio...
Quasi-Resonant IC FA5530/31/32
Features Features
Internal start-up circuit with 500V rating and low frequency operation achieves 140mW input at no load. Small Output Capacitance : Linearly reduced frequency for lighter load causes small ripple voltage. Suitable for Low Noise and High Efficiency about 90% Line-up of 3 types for maximum frequency and OLP 5530: 65kHz max.,16Vmax.-VCC,Auto-restart OLP 5531:130kHz max.,28Vmax.-VCC,Auto-restart OLP 5532:130kHz max.,28Vmax.-VCC,Timer-Latched OLP High ability of driving Power MOSFET ( High / Low side : 17 ohm / 3.5 ohm ) : available to 200W output Vcc rating 28V allows no series
regulator for auxiliary winding to clamp Vcc voltage for FA5531/32. 1ms Fixed Soft Start time Timer Latched Over-Voltage Protection of 16V/28V Vcc 8 pins package ( DIP/SO ) Usage : Notebook PC, LCD Monitor, LCD-TV etc.
3.3V 0.4V Overload
Timer 190ms 1510ms
5V
50uA
FA5531Block BlockDiagram Diagram FA5531
ZCD
Valley detection
1 shot (380ns)
Start up management Logic
VH
Start up Current
Time out (5µs)
Reset
CLR
VCC
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Max. fsw Blanking
Variable max.130kHz
UVLO
5V Reg. Check
5V Reg.
9.85V/9.1V
IS
5V
Internal supply
20kΩ
Current comparator
FB
125k
125k
Driver
S R
Q
OUT
1V Disable
ZCD
Soft start (1ms)
8V
OVP 2
VCC OVP 1
Timer latch (48µs)
Reset
28V
GND
Quasi-Resonant IC FA5530/31/32
ApplicationCircuit Circuit Application
80 to 264Vac
0.22μF 1M 1M 250V/ 3A FG E RA15-01 2SK3687 Cd 220pF 470pF ～ ー D3SBA60 470pF...
