FAN7554_03 Datasheet, PDF (1/22 Pages) Fairchild Semiconductor – Versatile PWM Controller

FAN7554
Versatile PWM Controller
www.fairchildsemi.com
Features
• Current mode control
• Pulse by pulse current limiting
• Low external components
• Under voltage lockout(UVLO): 9V/15V
• Stand-by current: typ. 100uA
• Power saving mode current: typ. 200uA
• Operating current: typ. 7mA
• Soft start
• On/off control
• Over load protection(OLP)
• Over voltage protection(OVP)
• Over current protection(OCP)
• Over current limit(OCL)
• Operating frequency up to 500kHz
• 1A totem-pole output current
Applications
• Off-Line & DC-DC converter
Description
The FAN7554 is a fixed frequency current mode PWM
controller. It is specially designed for off-line and DC to DC
converter applications with minimal external components.
These integrated circuits feature a trimmed oscillator for
precise duty cycle control, a temperature compensated
reference, an ON/OFF control, a high gain error amplifier, a
current sensing comparator, and a high current totem-pole
output. The FAN7554 has various protection functions such
as an over load protection, an over current protection, and
the over voltage protection, which include built-in auto
restart circuit. The FAN7554 is available in the 8-DIP
package as well as the 8-SOP package.
8-DIP
1
8-SOP
1
©2003 Fairchild Semiconductor Corporation
Rev. 1.0.3