4.5A I²C Controlled USB/Adapter Li-Ion Battery Charger with Power Path and 2.1A OTG Boost

Overview

The HL7015 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. To set the default input current limit, the HL7015 detects the input source following the USB battery charging spec 1.2. It supports an input operating voltage from 3.9V to 14V 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, 3.9-14V operating voltage range
• High efficiency 4.5A switch mode charger
  • 92% Charge efficiency at 2A
• USB-compliant/adapter charger
  • USB 1.0/2.0/3.0 compliant input current limit
  • 0.1-4.5A programmable input current limit
• Autonomous preconditioning, CC/CV charge control, termination, and recharge
• 1.5MHz Synchronous PWM converter for small 1µH inductor
• USB OTG boost programmable VOUT: 4.55-5.5V or 9V
  • Max IOUT: 2.1A @ 4.55-5.5V
  • 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
• Full range programmable charge parameter through I²C compatible interface
• Accuracy (0°-125°C)
  • ±1% Charge voltage regulation
  • ±10% Charge current regulation
  • ±10% Input current regulation
  • ±2% Output regulation in boost mode
• High integration
  • Dynamic power path management
  • Synchronous switch 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.