MC34674 is a highly flexible battery charger solution for portable devices powered by lithium-ion or lithium-polymer batteries. It features intelligent battery detection methods, including VREF negative temperature coefficient (NTC) thermistor, EN status indicator, VIN monitoring, EOC VIN internal power, and reference charging control. It is suitable for applications such as desktop chargers, travel chargers, and digital cameras.
The MC34674 is a fully automatic, single‑input battery charger IC designed for portable devices powered by lithium‑ion or lithium‑polymer cells. It offers flexible, factory‑programmable parameters such as pin functions, thermistor options, and charging settings, allowing customization for various applications like handheld chargers, travel adapters, and digital cameras.
Key features include a compact 2 mm × 3 mm × 0.65 mm UDFN thermal‑enhanced package, up to 1.05 A programmable charge current, input voltage up to 28 V with over‑voltage protection, and no need for external FETs, diodes, or current‑sense resistors. The device provides precise voltage regulation (±0.4% from –20 °C to +70 °C) and programmable functions such as trickle charge, EOC detection, and indicator pin configuration. This manual is written in Chinese.
| Maximum input voltage | 28 V |
|---|---|
| Programmable charge current | Up to 1.05 A |
| Input voltage accuracy (‑20 °C to +70 °C) | ±0.4 % |
| Output voltage accuracy (‑20 °C to +70 °C) | ±0.4 % |
| Operating temperature range | ‑40 °C to +85 °C |
| Package | 2 mm × 3 mm × 0.65 mm UDFN (thermal‑enhanced) |
| External components required | None (no external FET, diode, or sense resistor) |
The MC34674 can provide a programmable charge current up to 1.05 A.
The IC is rated for a maximum input voltage of 28 V.
No, the device does not require external FETs, diodes, or current‑sense resistors.
It is supplied in a 2 mm × 3 mm × 0.65 mm UDFN thermal‑enhanced package.