FAN7554: Versatile PWM Controller

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 overload protection, an over current protection, and the over voltage protection, which includes built-in auto restart circuit. The FAN7554 is available in the 8-DIP package as well as the 8-SOP package.

Features

• Current Mode Control
• Pulse by pulse current limiting
• Low external components
• Under-Voltage Lockout (UVLO): 9 V/1 5V
• Stand-by Current: Typ. 100 µA
• Power Saving Mode Current: Typ. 200 µA
• Operating Current: Typ. 7 mA
• Soft-Start
• On/Off Control
• Overload Protection (OLP)
• Over-Voltage Protection (OVP)
• Over-Current Protection (OCP)
• Over-Current Limit (OCL)
• Operating Frequency up to 500kHz
• 1 A Totem-pole Output Current