Fairchild Semiconductor LAF0001
The FAN7601 is a green programmable frequency current mode PWM controller. It is specially designed for the off-line adapter application and the auxiliary power supplies which require high efficiency at a light load and no load.| Part No. | LAF0001 |
|---|---|
| Datasheet | LAF0001 Download |
| Manufacturer |  Fairchild Semiconductor |
| Description | Green Current Mode PWM Controller |
| Buy | Stock & Price |
FEATURES
● Green Current Mode PWM Control● Low Operating Current: Max 4mA
● Burst Mode Operation
● Internal High Voltage Start-up Switch
● Under Voltage Lockout (UVLO): 12V/8V
● Latch Protection & Soft Start Function
● Over Voltage Protection: 19V
● Operating Frequency up to 300kHz
● Max Duty Cycle: 95% Typical
APPLICATIONS
● Off-Line AdapterAPPLICATIONS
● Auxiliary Power SuppliesDESCRIPTION
The internal high voltage start-up switch and the burst mode reduce the power loss. The FAN7601 includes some protections such as latch protection and over voltage protection. The latch protection can be used for over voltage protection and/or thermal protection and so on. And the soft start prevents the output voltage over shoot at start up. 10-SSOP 8-SOP 8-DIP 1 1 1 Internal Block Diagram Vref (10) 8 Rt/Ct (5) 4 OSC Vref 12uA Latch/SS (4) 3 1.5V OVP + − 2.5V 1V GND (6) 5 + − Start-up Circuit Vstr (1) 1 Enable 5V Ref Start-up Circuit OVP + − 7 Vcc (8) 19V UVLO + − 12V/8V SQ R OUT 6 (7) SQ R Reset Circuit Delay Circuit + − 0.97V/0.9V 2 CS/FB (3) + − − Latch/SS 1V * ( ) is 10-SSOP PIN Number ©2005 Fairchild Semiconductor Corporation Rev.
