BQ25790 - Texas Instruments

BQ25790 Buck-Boost Battery Charger

The BQ25790 is a fully integrated switch-mode buckboost charger for 1-4 cell Li-ion battery and Lipolymer battery. The integration includes 4 switching MOSFETs (Q1, Q2, Q3, Q4), input and charging current sensing circuits, the battery FET (QBAT) and all the loop compensation of the buck-boost converter. It provides high power density and design flexibility t.

Features

•1 High efficient synchronous Switch Mode buckboost charger for 1-4 cell battery
  – 750-kHz and 1.5-MHz Programmable switching frequencies
  – Efficiency optimized for charging 2s battery, 96.5% efficiency with 9-V input and 94.5% efficiency with 15-V input at 3-A ICHG
  – Charging current up to 5 A with 10-mA resolution
• Support wide range of input sources
  – 3.6-V to 24-V Wide input operating voltage range with 30-V absolute maximum rating
  – Maximum power tracking with VINDPM up to 22 V and IINDPM up to 3.3 A
  – Detect USB BC1.2, SDP, CDP, DCP, HVDCP and non-standard adapters
• Dual-input power mu.