Current Mode PWM Controller 14-Pin SOIC N

The Si9112 is a BiC/DMOS integrated circuit designed for use in high-efficiency switchmode power converters. A high-voltage DMOS input allows this controller to work over a wide range of input voltages (9- to 80-VDC). Current-mode PWM control circuitry is implemented in CMOS to reduce internal power consumption to less than 10 mW.A CMOS output driver provides high-speed switching of MOSPOWER devices large enough to supply 50 W of output power. When combined with an output MOSFET and transformer, the Si9112 can be used to implement single-ended power converter topologies (i.e., flyback, forward, and cuk).The Si9112 is available in both standard and lead (Pb)-free 14-pin plastic DIP and SOIC packages which are specified to operate over the industrial temperature range of -40°C to 85°C.

• 9- to 80-V Input Range
• Current-Mode Control
• High-Speed, Source-Sink Output Drive
• High Efficiency Operation (> 80%)
• Internal Start-Up Circuit
• Internal Oscillator (1 MHz)
• SHUTDOWN and RESET