I²C controlled single-cell battery charger IC with OTG
Halo Microelectronics has announced its HL7009A, a high-efficiency 3.6-A switching battery charger IC ideal for smartphones, tablet computing, and mobile IoT devices.
The HL7009A is a fully integrated, all-in-one switch-mode Li-Ion battery charger IC that can charge a single cell with a maximum current of 3.6-A. It simplifies charging by removing the power path management, making it a cost-effective and compact solution. Additionally, it improves charging efficiency and reduces size and cost by using a specialized method for precise charge current control and optimizing internal power switches for greater efficiency across different input voltages, resulting in faster charging times.
It supports a wide range of input sources, including the standard USB host port, USB charging port, and the AC-DC adapter. It’s compatible with input operating voltages ranging from 4.0 V to 9.5 V, enabling it to energize the system rail even in the absence of a battery. Additionally, it is equipped to facilitate BC1.2 detection, ensuring the application of an appropriate input current limit for optimal utilization of the power supplied by the input source.
The HL7009A independently handles Li-ion battery charging when linked to an I²C host. It oversees battery voltage, executes charging in three stages: pre-charge, constant current, and constant voltage, and stops when fully charged. If the battery voltage drops too low, it restarts charging. The I²C interface enables customizable charging settings and system-level communication. Without an I²C host, a built-in timer ensures safe charging cessation.
It also supports the USB On-the-Go (OTG) function, allowing for configurable output voltage at VBUS, with a maximum output current reaching up to 1.2 A.
“The HL7009A battery charger IC with its exceptionally high efficiency enables a faster and more eco-friendly charging experience for today’s consumers,” stated Halo Microelectronics. “Halo Microelectronics continues to produce stellar battery chargers, and it’s no exception here with the new USB-compliant, fully integrated switch-mode Li-Ion battery charger.”
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