company blog about Halo HL7019 3A I²C Controlled USB/Adapter Li-Ion Battery Charger With Power Path And 2.1A OTG Boost

Halo HL7019 3A I²C Controlled USB/Adapter Li-Ion Battery Charger With Power Path And 2.1A OTG Boost

Shenzhen Mingjiada Electronics Co., Ltd. has established itself as a leader in the electronic component recycling and distribution sector through its extensive product portfolio, global perspective, and professional services. The HL7019 supplied or recycled by the company offers engineers a highly optimised solution through its integrated features: 3A fast charging, 2.1A OTG output, full integration, and intelligent control. It is particularly suited for portable devices demanding compact design and high performance, such as tablets, premium smartphones, handheld gimbals, and portable medical equipment.

Overview Of HL7019 Chip

The HL7019 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 the 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 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).

Features Of HL7019

20V Input voltage tolerance, 3.9-14V operating voltage range

High efficiency 3A switch mode charger

92% Charge efficiency at 2A.

USB-compliant/adapter charger

USB 1.0/2.0/3.0 compliant input current limit

0.1-3A 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: 4.55V to 5.51V or 9V.

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

Full range programmable charge parameter through I²C compatible interface

HL7019 I²C Interface and Intelligent Control

The HL7019's defining feature is its programmable I²C digital interface. This enables the device's main processor to precisely manage the charging process via simple bus commands.

Engineers can dynamically set charging current and voltage thresholds through the I²C interface, whilst reading real-time chip status such as input voltage, battery temperature, and charging phase. This flexibility permits devices to optimise charging strategies according to varying usage scenarios and power conditions—whether connected to standard USB ports or high-power adapters.

Should no I²C host intervene, the chip's integrated safety timer ensures automatic, secure termination of the charging process after a preset duration, providing dual protection for the device.

Applications Of HL7019

Tablet PC

Smart Phone

Power Bank

Portable Media Player