HL7005D

Overview

The HL7005D is a compact, flexible, high-efficiency, USB compliant switch-mode charge management device for single cell Li-ion and Li-polymer battery used in a wide range of portable applications. The charge parameters can be programmed through I²C interface. The HL7005D integrates a synchronous PWM controller, power MOSFET, input current sensing, high-accuracy current and voltage regulation, and charge termination function into a tiny CSP package.

The HL7005D provides a complete automatic three-phase battery charging control: trickle charge, constant-current charge (CC), and constant voltage charge (CV) until the battery reaches the charge termination voltage. The input current is automatically limited to the value set by the host. Charging is terminated based on the battery voltage and a user selectable minimum current level. A safety timer with reset control provides a safety backup for I²C interface. During normal operation, the IC automatically restarts the charge cycle if battery voltage falls below an internal threshold and automatically enters a sleep mode or a high impedance mode when input supply is not correctly connected. The charge status can be reported to the host through the I²C interface.

During the charging process, the IC monitors its junction temperature (T_J) and reduces the charge current once T_J increases to about 120°C. To support USB OTG device, the HL7005D can provide VBUS (5.0V) by boosting the battery voltage.

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