Description

SI9110DY is a current mode PWM controller designed for ISDN power supplies. It comes in a 14-pin SOIC package and provides all the necessary functions to implement a single-switch PWM with minimal external parts. The controller features a 200-V depletion mode MOSFET that can power directly off the high input bus without the need for an external start-up circuit. The Start and Stop input voltage thresholds can be programmed within the operating input voltage range using a resistor divider, where +VIN (Start) must be greater than +VIN (Stop).

Specifications and features

- BiC/DMOS Technology

- Current Mode Control

- Max 50% Duty Cycle Operation

- 1.3-MHz Error Amp

- Up to 500-kHz Internal Oscillator

- Soft-Start

- 0.6-V Fast Over-Current Protection

- <5-µA Supply Current for +VIN <18 V

- 23.5-V to 200-V Input Voltage Range

- Programmable Start/Stop Capability

- Internal Start-Up Circuit

- Power_Good Output

Application Scenarios

- ISDN power supplies

Comparison