BCT 811X / BCT 812X Family

SMPS Output Monitor and Linear Regulator

General Description

The BCT8113/BCT8123/BCT8115/BCT8123 is an advanced output control and monitoring circuit intended for use in the secondary side of the switching mode power supply (SMPS). It consist of a shunt regulator which is needed for the feedback control, additional linear regulator output and protection circuit. The chip can monitor the output over-voltage protection (OVP), load Over-current protection (OCP), VDD over-voltage protection, integrated thermal protection. In additional, the shut down (SHDN) and power good (PGOOD) are the control signals provided by BCT8123/ BCT8125 for any application which is incorporated with MCU or digital circuit.

The BCT8113/BCT8123/BCT8115/BCT8123 offers a quick solution to provide protection feature and increase the overall reliability to the end-user products. Besides, it offers simple circuit and cost effective solution with minimal external components and reduced PCB board space for switching power supply.

Features

Applications

• On chip shunt regulator for feedback control
• Load Over Voltage Protection (OVP)
• Load Over Current Protection (OCP)
• VDD over voltage protection
• Over Temperature Protection (OTP)
• Additional linear regulator output
  BCT8115/BCT8125: 5.0V
  BCT8113/BCT8123: 3.3V
• Additional Power Good (PGOOD) and Shunt
  Down (SHDN) control pin for SOP8 package
• Option in latched fault or non-latched fault
• Low power consumption
• Available in Pb-free SOP8 or SOT23-6 package

• Battery charger, AC/DC adapter
• Auxiliary switching power supply
• Switching power supply for home appliance

Typical Application Circuit

Full Datasheet Download [pdf]