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发布者:微桥FP5451 发布时间:2010-1-6 阅读:4095次    关键字: FP5451
FP5451-DUAL CHANNEL PWM CONTROL IC


FP5451A Dual Channel PWM Controller with SCP / DTC Function
General Description
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      The FP5451A 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 under voltage lockout circuit (UVLO). It offers space and low cost in many applications such as the DC / DC converters and backlight inverters.
      Using FP5451A, 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


Features
˙Wide Operating Voltage Range: 4~40V
˙Feedback Reference Voltage: 2.5V
˙Reference Voltage Precision: 1%
˙Output Sink Current up to 100mA
˙Oscillator Frequency: Max. 500KHz
˙Low Quiescent Supply Current 
˙Variable Duty Control (DTC)
˙UVLO Protection Function
˙SCP Protection Function (Typ. 1.3V)
˙Package: SOP-16L / SSOP-16L

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