深圳市科瑞芯电子有限公司

ETA/钰泰 ETA1918Q3Q QFN3x3-16 具有动态电源路径管理功能的2.5A、3MHz开关充电器

DESCRIPTION

ETA1918Q3Q is a switching Li-Ion battery charger with dynamic power path control and input current limiting. When a battery is connected, depending on the battery voltage, the DC-DC switching regulator either pre-conditions, fast-charges the battery or just regulates a system voltage (VSYS) to a preset voltage. It does not require an external sense resistor for current sensing. The charging current is determined by programming ISET1 or ISET2 pin, depending on the state of the nUSB_DET. One should pull nUSB_DET low, if an USB adapter input is present, the charge current is set by ISET2; otherwise, it is set by ISET1. When the battery voltage reaches the termination voltage i.e. 4.2V, the charging path disconnects SYS to BATT. The ETA1918Q3Q also includes a dynamic power path when the SYS load current exceeds current limit of the DCDC regulator internally set, the SYS voltage falls below VBATT, ETA1918Q3Q turns on the power-path to supplement the system load through the battery.

FEATURES

● Switching Charger with Power Path Management

● Up to 95% DC-DC Efficiency

● 50mΩ Power Path MOSFET

● Up to 2.5A Max charging current

● Instant on with a dead Battery or no Battery

● No battery detection

● No External Sense resistor

● Programmable USB and AC IN Charging Current

APPLICATIONS

● Tablet, MID

● Smart Phone

● Power Bank

科瑞芯电子秉持[追求品质、专*业诚信、持续创*新]的理念，为客户提供工业标品质、低成*本的半导体件，提供专*业技术支援及完*整的解决方案。持续追求、不断创*新以及提供更佳更广的准、高服务，协助客户及厂商提高竞争能力，致力于成为电子半导体通路商之一。