
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
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
u Wide 8V to 30V Continuous Operating Input Range
u 78mΩ/65mΩ Low RDS(ON) Internal Power MOSFET
u Up to 93% Efficiency
u Default 160kHz Switching Frequency
u Internal Soft Start
u Output Line Drop Compensation
u Over-Current Protection (OCP) programmable with External Resistor
u No Loop Compensation Required
u Thermal Shutdown
u 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)