UC2823A - Texas Instruments

UC2823A HIGH-SPEED PWM CONTROLLER

The UC3823A and UC3823B and the UC3825A and UC3825B family of PWM controllers are improved versions of the standard UC3823 and UC3825 family. 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 assured to a tolerance of 5%. O.

Features

• Improved versions of the UC3823/UC3825 PWMs
• 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-μA startup current
• Pulse-by-pulse current limiting comparator
• Latched overcurrent comparator with full cycle restart 2 Description The UC3823A and UC3823B and the UC3825A and UC3825B family of PWM controllers are improved versions of the standard UC3823 and UC3825 family. Performance enhancement.