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FP5452 Dual PWM Controller With SCP / DTC Function
The FP5452 is a dual channel PWM buck controller with short circuit protection (SCP) and adjustable maximum duty control (DTC) function. It includes one 2.5V precision voltage reference regulator, two error amplifiers, PWM control circuits, totem-pole output stages and the under voltage lockout circuit (UVLO). It offers space and low cost solutions in many applications such as the DC / DC converters and backlight inverters.
Using FP5452, it is easy to complete a power conversion regulator design with few external components. The circuit diagram of the typical application example is as below
˙Wide Operating Voltage range: 3.6~40V
˙Fixed Reference Voltage: 2.5V
˙Reference Voltage Precision: 2%
˙Oscillator Frequency: Max. 500KHz
˙Totem-pole Output stage
˙Low Quiescent Supply Current Under 3.5mA
˙Variable dead-time Control (DTC)
˙UVLO Protection Function
˙SCP Protection Function (Threshold Voltage: 1.3V)
˙Package: SOP-16L / SSOP-16L
FP5452双PWM控制器SCP / DTC的功能
FP5452是一个双通道PWM降压控制器短路保护(SCP)和可调最大占空比控制(DTC)功能。它包括一个2.5V精密参考电压稳压器,两个误差放大器,PWM控制电路,图腾柱输出级和欠压锁定电路(UVLO)。它提供了许多应用,如DC / DC转换器和背光逆变器空间和低成本的解决方案
。使用FP5452,很容易完成一个电源转换器的设计与极少的外部元件。电路的典型应用示例图如下
˙宽工作电压范围:3.6〜40V ˙固定参考电压:2.5V ˙参考电压精度:2%˙振荡器频率:最大。500KHz的 3.5毫安˙ ˙图腾柱输出阶段˙低静态电源电流在可变死区时间控制(DTC)˙ UVLO保护功能˙ SCP的保护功能(阈值电压:1.3V)˙包装:SOP - 16L / SSOP - 16L
FP5452
台湾远翔