The UC2843AQD8RQ1 from Texas Instruments is an automotive-qualified current-mode PWM controller designed for high-performance switched-mode power supplies and DC-DC converter applications. It supports an operating voltage range of 8.5V to 30V and switching frequencies of up to 500kHz, providing flexible control for compact and efficient power conversion systems.
The device uses current-mode control and supports a maximum duty cycle of 100%. It integrates essential control and protection functions including pulse-by-pulse current limiting, undervoltage lockout with hysteresis, automatic feed-forward compensation, double-pulse suppression, and an internal bandgap reference.
UC2843AQD8RQ1 also features a high-current totem-pole output stage, allowing efficient driving of external power switching devices. Its low startup current of less than 0.5mA helps reduce standby power consumption and improves power-supply startup efficiency.
The controller supports multiple power topologies including Boost, Buck-Boost, Flyback, and Forward converters, making it suitable for automotive power supplies, onboard electronics, industrial DC-DC converters, auxiliary power supplies, and other switching power applications.
The device is supplied in an 8-pin SOIC (D) package and supports an extended operating temperature range of -40°C to +125°C, making it suitable for demanding automotive environments.
Key Features
- Automotive-qualified current-mode PWM controller
- Operating voltage: 8.5V to 30V
- Maximum switching frequency: 500kHz
- Maximum duty cycle: 100%
- Current-mode control
- Adjustable switching frequency
- Pulse-by-pulse current limiting
- Undervoltage lockout with hysteresis
- Automatic feed-forward compensation
- Double-pulse suppression
- Integrated error amplifier
- High-current totem-pole output
- Low startup current: <0.5mA
- Internal trimmed bandgap reference
- Supports Boost, Buck-Boost, Flyback and Forward topologies
- Operating temperature: -40°C to +125°C
- Package: SOIC-8 (D)
- RoHS and REACH compliant
Reviews
There are no reviews yet.