HT4928S Integrated Circuit by HOTCHIP | SOP-8 Package

HT4928S | Mobile Power Supply Management IC
Package: SOP-8 | Pins: 8

The HT4928S from HOTCHIP is a highly integrated power management IC designed for mobile power supply applications. It integrates charging control, boost discharge management, LED indication, and protection features into a compact SOP-8 package, requiring minimal external components.

With its 0.8A linear charging, constant current/constant voltage regulation, and 91% boost efficiency using synchronous rectification, the HT4928S offers a powerful and efficient solution for portable power systems. It supports 0V battery charging, intelligent load detection, and automatic sleep, ensuring both reliability and energy efficiency.

Key Features

• Built-in charging management module (0.8A linear charge, CC/CV/turbulent mode)

• Fixed 4.20V charging voltage (supports 0V battery charging)

• Boost discharge with synchronous rectification – efficiency up to 91%

• Fixed 5.1V regulated output without external resistors

• Output current: 0.8A (typical at 3.6V battery)

• Automatic load detection: starts boost when load inserted, sleep when removed

• LED indication for charging/discharging (single/dual lamp)

• Comprehensive protections:

  • Overcharge & over-discharge

  • Overcurrent & short circuit

  • Temperature-dependent current reduction (begins at 130°C)

  • Anti-backflow function on charging input (no external diode required)

  • 4kV ESD protection

• Battery low voltage reminder

• Fixed switching frequency: 1 MHz

• Common input/output port with intelligent charge/discharge recognition

Typical Applications

• Mobile power banks

• LED lighting systems

• Battery-powered toys

Other Specifications

• Number of Pins: 8 (SOP-8 package)