STMicroelectronics 20-Pin SO-8 5-Channel PWM Controller 75 kHz 20V STCMB1

STMicroelectronics STCMB1 is a 5-channel PWM controller in a 20-pin SO-8 surface mount package designed for efficient power management in industrial and electronic applications. Operating at a maximum switching frequency of 75 kHz and a supply voltage range from 10V to 20V, it offers robust performance for power factor correction (PFC) and LLC resonant half-bridge control.

This device integrates an 800 V-rated high voltage section and advanced glue logic which supervises the operation of three critical blocks including the PFC stage based on a proprietary constant on-time control method. This approach eliminates the need for sinusoidal input references, thereby minimizing system costs and external component count.

The STCMB1 has a low start-up supply current of only 100 microamperes and operates efficiently with a nominal supply current of 6 mA. It provides a 5.2 V output voltage and supports up to 5 outputs, making it suitable for complex PWM applications requiring multiple controlled power channels.

Designed to withstand harsh environments, the controller operates reliably over a wide temperature range from -40°C to 150°C. Advanced protections including AC brown-in and brown-out detection, inrush current control, overvoltage protection (OVP), overcurrent protection (OCP), inductor saturation monitoring, and feedback disconnection safeguard both the device and connected circuits.

The half-bridge operation supports frequencies up to 750 kHz with a self-adjusting deadtime (HSP) function to combat capacitive effects, while synchronous burst mode operation enhances power savings in standby conditions.

The compact SO-8 package measures 13 mm in length, 7 mm in width, and 2.65 mm in height, making it suitable for space-constrained designs. This product is manufactured in the Philippines under stringent quality standards.

Typical applications include industrial power supplies, power factor correction circuits, and other power management systems in electronics, construction equipment, and HVAC industries.

The device's proprietary constant on-time PFC control reduces component count and system cost. Comprehensive protection features increase system reliability and safety. Wide operating temperature range suits industrial and automotive environments.

Compact SO-8 packaging supports miniaturized circuit designs. High voltage double-ended controller integrates multiple functional blocks. Synchronous burst mode operation enhances energy efficiency in low load scenarios.

Self-adjusting deadtime optimizes switching performance and reduces noise. Manufactured in the Philippines, ensuring compliance with quality standards. Explore similar PWM Controllers and power management ICs for advanced industrial and electronic applications at EnvMart.