描述 Description

The AZ3842/3/4/5 are high performance fixed frequency current-mode PWM controller series.

These integrated circuits are optimized for off-line and DC-DC converter applications with minimum external components. They feature under-voltage lockout (UVLO) circuit for low start-up current, trimmed oscillator for precise duty cycle control, current sense comparator providing maximum current limiting and a totem pole output stage for increasing output current.In addition, these ICs also feature accurate protection against over-temperature, over-current and maximal output power.

特性 Features

? Robust VREF Line/Load Regulation
- Low Line Regulation : 4mV
- Low Load Regulation : 4mV
? High Stability of Reference Voltage over a Full Temperature Range: 0.2mV/ oC
? Operating Frequency up to 500KHz
? High PWM Frequency Stability over a Full Temperature Range: 2.5%
? High PWM Frequency Stability under a Full Supply Voltage Range: 0.2%
? Accurate Over-temperature Protection with Hysteresis
? UVLO with Hysteresis

應(yīng)用 Application

? Off-line Converter
? DC-DC Converter
? Voltage Adapter
? CRT Monitor Power Supply
? Desktop Power Supply
? DVD/STB Power Supply