UC2825A-EP

UC2825A-EP www.ti.com SGLS305D – JULY 2005 – REVISED SEPTEMBER 2010 HIGH-SPEED PWM CONTROLLER Check for Samples: UC2825A-EP FEATURES 1 Improved Version of the UC2825 PWM Compatible With Voltage-Mode or Current-Mode Control Methods Practical Operation at Switching Frequencies to 1 MHz 50-ns Propagation Delay to Output High-Current Dual Totem-Pole Outputs (2-A Peak) Trimmed Oscillator Discharge Current Low 100-mA Startup Current Pulse-by-Pulse Current-Limiting Comparator Latched Overcurrent Comparator With Full Cycle Restart SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS Controlled Baseline One Assembly/Test Site One Fabrication Site Available in Military (–55°C/125°C) Temperature Range(1) Extended Product Life Cycle Extended Product-Change Notification Product Traceability (1) Additional temperature ranges are available - contact factory DESCRIPTION/ORDERING INFORMATION The UC2825A-EP pulse width modulation (PWM) controller is an improved version of the standard UC2825. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12 MHz, while input offset voltage is 2 mV. Current-limit threshold is specified to a tolerance of 5%. Oscillator discharge current is specified at 10 mA for accurate dead-time control. Frequency accuracy is improved to 6%. Startup supply current, typically 100 mA, is ideal for off-line applications. The output drivers are redesigned to actively sink cur...