3A 12C Controlled USB/Adapter Li-ion Battery Charger with Power Path and 2.1A OTG Boost

Overview

The HL7028 is a fully integrated switch-mode Li-ion battery charger with power MOSFET, power path management, I²C interface, and USB On-the-Go (OTG) boost function. It can be used with single cell or multi-cells in parallel Li-ion and Li-polymer batteries in a wide range of cellphones, smartphones, tablets, power banks, and other portable devices. Its switch-mode operation and low-resistance power path maximize charging, discharging, and boost efficiency. It also reduces battery charging time and extends battery life during a discharging phase.

This device supports a wide range of input sources, including standard USB host port, USB charging port, and high-power AC-DC adapter. It supports an input operating voltage from 3.9V to 7V and can power up the system rail without a battery. It can automatically adjust to the maximum power output of the input source via the input dynamic power management control (INDPM).

For more detailed description of the device, please download a product brief.

Features

• 20V input voltage tolerance, 3.9–7V operating voltage range
• High efficiency 3A switch mode charger
• USB-compliant/adapter charger
  • USB 1.0/2.0/3.0 compliant input current limit
  • 0.1-3A Programmable input current limit
• Autonomous preconditioning, CC/CV charge control, termination, and recharge
  • 1.5MHz Synchronous PWM converter for small 1uH inductor
• USB OTG boost programmable VOUT: 4.55-5.51V
  • Max IOUT: 2.1A @ 4.55-5.51V
  • 90% Efficiency at 1.5A
  • Hiccup mode over-current protection for reliable capacitive load start-up
• Power path management
  • Instant system on with no battery or deeply discharged battery
  • Ideal diode operation in battery assistant mode
  • System reset and battery disconnect
• Full range programmable charge parameter through I²C compatible interface
• Accuracy (0°-125°C)
  • ±1% Charge voltage regulation
  • ±10% Charge current regulation
  • ±15% Input current regulation
  • ±2% Output regulation in boost mode
• High integration
  • Dynamic power path management
  • Synchronous switching MOSFET
  • Integrated current sensing
  • Bootstrap diode
  • Internal loop compensation
• Comprehensive protections
  • Safety timer with reset control
  • Thermal regulation and shutdown
  • Input & output over-voltage protection
  • Output over-current protection
  • Reverse battery leakage protection
• Charge status output for LED or host processor
• Shipping mode and low battery leakage current
• 4mm x 4mm QFN-24 package

For more information or a full datasheet request, please contact the factory at sales@halomicro.com.