Overview

Description

The ZSPM4551 is a DC/DC synchronous switching lithium-ion (Li-Ion) battery charger with fully integrated power switches, internal compensation, and full fault protection. Its switching frequency of 1MHz enables the use of small filter components, resulting in smaller board space and reduced BOM cost. In Full-Charge Constant-Current Mode, the regulation is for constant current (CC). Once termination voltage is reached, the regulator operates in voltage mode. When the regulator is disabled (the EN pin is low), the device draws 10µA (typical) quiescent current. The ZSPM4551 includes supervisory reporting through the NFLT (inverted fault) open-drain output to interface other components in the system. Device programming is achieved by an I²C interface through the SCL and SDA pins.

Features

  • VBAT reverse-current blocking
  • Programmable temperature-compensated termination voltage: 3.94V to 4.18V ±1%
  • User programmable maximum charge current: 50mA to 1500mA
  • Current mode PWM control in constant voltage
  • Supervisor for VBAT reported at the NFLT pin
  • Input supply under-voltage lockout
  • Full protection for over-current, over-temperature, VBAT over-voltage, and charging timeout
  • Charge status indication
  • I2C program interface with EEPROM registers

Documentation

Title Type Date
PDF526 KB
Datasheet
PDF197 KB
Application Note
PDF153 KB
Datasheet - Short-form
7Z1.21 MB
Guide
PDF963 KB
Manual - Development Tools

Design & Development

Software & Tools

Software Downloads

Title Type Date
ZIP935 KB
Software & Tools - Evaluation Software

Boards & Kits

Boards & Kits

Models