LT1510CS8

电池管理 LT1510 - Constant-Voltage/Constant-Current Battery Charger

DESCRIPTION

With switching frequency as high as 500kHz, The LT®1510 current mode PWM battery charger is the smallest, simplest, most efficient solution to fast-charge modern rechargeable batteries including lithium-ion Li-Ion, nickel metal-hydride NiMH

.

and nickel-cadmium NiCd* that

require constant-current and/or constant-voltage charging. The internal switch is capable of delivering 1.5A DC current 2A peak current. The 0.1Ωonboard current sense resistor makes the charging current programming very simple. One resistor or a programming current from

a DAC is required to set the full charging current 1.5A to within 5% accuracy. The LT1510 with 0.5% reference voltage accuracy meets the critical constant-voltage charging requirement for lithium cells.

FEATURES

■ Charges NiCd, NiMH and Lithium-Ion Batteries - Only One 1/10W Resistor Is Needed to Program Charging Current

■ High Efficiency Current Mode PWM with 1.5A Internal Switch and Sense Resistor

■ 3% Typical Charging Current Accuracy

■ Precision 0.5% Voltage Reference for Voltage Mode Charging or Overvoltage Protection

■ Current Sensing Can Be at Either Terminal of the Battery

■ Low Reverse Battery Drain Current: 3µA

■ Charging Current Soft Start

■ Shutdown Control

■ 500kHz Version Uses Small Inductor

APPLICATIONS

■ Chargers for NiCd, NiMH and Lithium Batteries

■ Step-Down Switching Regulator with Precision Adjustable Current Limit