The document mainly introduces the features and characteristics of MAX1772 battery charger control IC, including input current limiting, output voltage accuracy, programmable battery charging current, analog input control charging current and voltage, monitoring output current, charging current and AC adapter presence.
The MAX1772 is a highly‑integrated battery‑charger control IC that supports multiple chemistries (Li+, NiCd, NiMH, Lead‑acid) and provides programmable charge current up to 4 A. It uses a buck topology with synchronous rectification for high efficiency and includes monitoring outputs for AC adapter current, charging current, and adapter presence.
Key specifications include an input voltage range of 8 V‑28 V, output voltage accuracy of ±0.5 %, efficiency greater than 95 %, and a maximum duty cycle of 99.99 %. The device is offered in a 28‑pin QSOP package and is intended for notebook, PDA, and handheld terminal applications.
| Input Voltage Range | 8 V – 28 V |
|---|---|
| Output Voltage Accuracy | ±0.5 % |
| Programmable Charge Current | up to >4 A |
| Efficiency | >95 % |
| Maximum Duty Cycle | 99.99 % |
| Supported Battery Chemistries | Li+, NiCd, NiMH, Lead Acid, etc. |
| Package Type | 28‑pin QSOP |
The MAX1772 can provide a programmable charge current of more than 4 A.
It operates with an input voltage from 8 V to 28 V.
The device can charge Li+, NiCd, NiMH, Lead‑acid, and other chemistries.
The charger achieves an efficiency greater than 95 %.