ADI ADP1614 650 kHz/1.3 MHz 4A 升压PWM DC－DC转换器设计方案
ADI公司的ADP1614是一款内部集成输出达到20V电压的功率开关的升压型DC/DC转换器，ADP1614采用外部电阻的设置限制输出电流的大小，ADP1614采用两种固定的增压开关频率，分别为650KHz和1.3MHz。ADP1614在对空间有约束的应用中占有很大优势，常用于便携式产品中。ADP1614具有在电流模式下PWM效率达到94%，使能器件可调软开关保护涌入电流，在电流模式下具有优秀的瞬态响应，同时具有欠压闭锁、过热保护等特点。本文通过总结ADP1614器件的特点，介绍器件、特性、应用方向及内部结构框图，并给参考设计实例原理图、制板图及元器件清单。
The ADP1614 is a step-up, dc-to-dc switching converter with an integrated power switch capable of providing an output voltage as high as 20 V. The ADP1614 is available with a pin-adjustable current limit that is set via an external resistor. The boost switching frequency is fixed to either 650 kHz or 1.3 MHz. With a package height of 0.8 mm, the ADP1614 is optimal for space constrained applications, such as portable devices or thin film transistor (TFT) liquid crystal displays (LCDs).
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