AZ3845数据手册AAT中文资料规格书

描述 Description

The AZ3842/3/4/5 are high performance fixed frequency current-mode PWM controller series. \r
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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 \r
- Low Line Regulation : 4mV\r
- Low Load Regulation : 4mV\r
• High Stability of Reference Voltage over a Full Temperature Range: 0.2mV/ oC\r
• Operating Frequency up to 500KHz\r
• High PWM Frequency Stability over a Full Temperature Range: 2.5%\r
• High PWM Frequency Stability under a Full Supply Voltage Range: 0.2%\r
• Accurate Over-temperature Protection with Hysteresis\r
• UVLO with Hysteresis

应用 Application

• Off-line Converter\r
• DC-DC Converter\r
• Voltage Adapter\r
• CRT Monitor Power Supply\r
• Desktop Power Supply\r
• DVD/STB Power Supply