Harman Kardon MAS 110, Service Manual

Page: 23 / 57

©2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
April 2006
FAN7602 Rev. 1.0.
1
FAN7602 Green Current Mode PWM Controller
FAN7602
Green Current Mode PWM Controller
Features
„
Green Current Mode PWM Control
„
Fixed 65kHz Operation with Frequency Modulation
„
Internal High-Voltage Start-up Switch
„
Burst Mode Operation
„
Line Voltage Feed Forward to Limit Maximum Power
„
Line Under-Voltage Protection
„
Latch Protection & Internal Soft-Start (10ms) Function
„
Overload Protection
„
Over Voltage Protection
„
Low Operation Current: Typ. 1mA
„
8-pin DIP
Applications
„
Adapter
„
LCD Monitor Power
„
Auxiliary Power Supply
Related Application Notes
„
AN6014 - Green Current Mode PWM Controller
FAN7602
Description
The FAN7602 is a green current mode PWM controller.
It is specially designed for off-line adapter application,
DVDP, VCR, LCD monitor application, and auxiliary
power supplies.
The internal high
-
voltage start-up switch and the burst
mode operation reduce the power loss in standby mode.
Because of the internal start-up switch and the burst
mode, it is possible to supply 0.5W load limiting the input
power under 1W when the input line voltage is 265Vac.
On no-load condition, the input power is under 0.3W.
The maximum power can be limited constantly, regard-
less of the line voltage change using the power limit
function.
The switching frequency is internally fixed to be 65kHz
and the frequency modulation technique reduces EMI.
The FAN7602 includes various protections for the sys-
tem reliability and the internal soft start prevents the out-
put voltage over-shoot at start-up.
Ordering Information
Part Number
Operating Temp.
Range Pb-Free Package Packing Method
Marking
Code
FAN7602N -25
q
C to +125
q
C Yes 8-DIP Rail FAN7602
harman/kardon MAS 100 / MAS 110 / MAS 1 Service Manual
Page 23 of 57