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LP64920同步整流车充2.4A方案芯片

LP64920同步整流车充2.4A方案芯片

简要描述:

LP64920同步整流车充2.4A方案芯片
The LP64920 operates by a constant frequency, current mode architecture. The output voltage is set by an external divider returned to the FB pin. An error amplifier compares the

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General Description     LP64920同步整流车充2.4A方案芯片

The LP64920 is a synchronous, rectified, step-down, switch-mode converter with built-in power MOSFET. The LP64920 offers a very compact solution that achieves a maximum of 2.4A of continuous output current. LP64920同步整流车充2.4A方案芯片

The LP64920 has synchronous mode operation for high efficiency over the output current load range. Current-mode operation provides fast transient response and eases loop stabilization.

The LP64920 requires a minimum number of readily available standard external components. Other features include cable compensation, programmable current limit and thermal shutdown.

Order Informatio

LP64920 □ □ □ □      

Features

Wide 8V to 30V Continuous Operating Input Range

78mΩ/65mΩ Low RDS(ON) Internal Power MOSFET

Up to 93% Efficiency

Default 160kHz Switching Frequency

Internal Soft Start

Output Line Drop Compensation

Over-Current Protection (OCP) programmable with External Resistor

No Loop Compensation Required

Thermal Shutdown

Available in SOP8 Package

Typical Application Circuit

 

47uH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5.1V/2.4A

 

F: Pb-Free

Package Type SO: SOP8

Current Sense Voltage A: VCS=53mV

B: VCS=65mV

 

 

100uF

 

 

 

1uF

VIN

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

SW

 

 

 

 

 

 

LP64920    FB

 

 

 

 

 

CS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rsen 22mR

 

 

Rup 15K

 

 

 

 

 

Rdn 2K

 

 

 

10uF

 

 

 

470uF

 

 

 

 

 

 

 

 

Vout-

 

 

 

 

Applications

² Car Charger

² Pre-Regulator for Linear Regulators

² Distributed Power Systems

² USB Dedicated Charging Ports (DCP)

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