深圳市中立信电子科技有限公司

MAX1898EUB42+

电池管理 Linear Charger for Single-Cell Li+ Battery

General Description MAX1898EUB42+

The MAX1898, with an external PNP or PMOS transistor, forms a complete charger for 1-cell lithium-ion (Li+) batteries. The MAX1898 provides accurate constant-current/constant-voltage charging. Battery regulation voltage accuracy is ±0.75% for optimum battery performance and cycle life. Charging current is user set, but is sensed internally so no external current-sense resistor is needed. The MAX1898 also provides outputs to monitor charge status, presence-of-input power source, and charge current. Additional features include shutdown, optional charge-cycle restart without input-power cycling, selectable charge termination safety timer, and low-current preconditioning for deeply discharged cells.

Features MAX1898EUB42+

♦ Simple, Safe Linear Charger

♦ Uses Low-Cost PNP or PMOS Pass Element

♦ 4.5V to 12V Input Range

♦ Internal Current-Sense Resistor

♦ ±0.75% Voltage Accuracy

♦ Programmable Charging Current

♦ Automatic Input Power-Source Detection

♦ LED Charge Status Indicator

♦ Programmable Safety Timer

♦ Current-Sense Monitor Output

♦ Optional/Adjustable Auto-Restart

♦ Small μMAX Package

Applications MAX1898EUB42+

Single-Cell Li+ Powered Portables

Self-Charging Battery Packs

PDAs

Cell Phones

Cradle Chargers