MICROCHIP MCP73833-AMI/UN Li-Ion/Li-Pol Battery Charger IC, MSOP-10

The MICROCHIP MCP73833-AMI/UN is a compact, stand‑alone linear charge management controller designed specifically for single‑cell lithium‑ion (Li‑Ion) and lithium‑polymer (Li‑Pol) batteries. Housed in a space‑saving 10‑pin MSOP package, this device is an ideal solution for portable and consumer electronics where board space and cost are critical considerations. It integrates a complete charging system, requiring very few external components for operation.

The charger employs an efficient constant‑current/constant‑voltage (CC/CV) charge algorithm with selectable preconditioning and automatic charge termination. This ensures safe and optimal charging for batteries, including those that are deeply depleted. A key protective feature is its built‑in thermal regulation, which automatically limits the charge current based on die temperature during high‑power or high‑ambient conditions. This not only safeguards the battery and the IC but also optimises total charge cycle time.

Core Features & Protections

• Integrated Design: Includes a pass transistor, current sense circuitry, and reverse discharge protection, simplifying your design and improving reliability.
• Programmable Current: The maximum charge current is programmable up to 1A via a single external resistor.
• Automatic Management: Features automatic recharge initiation, automatic end‑of‑charge control, and automatic power‑down when input power is removed.
• Status Indicators: Two charge status outputs provide clear visual or logical indication of the charging process.
• Wide Compatibility: With a supply voltage range of 3.75V to 6V, it is perfectly suited for charging from a 6V input and is capable of adhering to USB power bus specifications for USB‑port charging applications.

Specifications

• Regulated Output Voltage: 4.2V
• Battery Compatibility: Single‑cell Li‑Ion orLi