LTC4006 is a 4A high efficiency Li-ion battery charger
The LTC4006 is a complete constant‑current/constant‑voltage charger controller for 2‑, 3‑ or 4‑cell lithium‑ion batteries. It offers high conversion efficiency (up to 96 %), programmable charge current with ±4 % accuracy, and built‑in charge termination with automatic restart. The device includes a thermistor input for temperature‑qualified charging and a wide input voltage range.
The document contains absolute maximum ratings, detailed electrical characteristics, typical performance curves, pin‑function descriptions, package dimensions, and example applications. It also lists related Linear Technology parts and provides a typical schematic for a 2‑A Li‑ion battery charger.
| Input Voltage Range | 6 V to 28 V |
|---|---|
| Maximum Duty Cycle | 98 % to 99 % |
| Regulator Switching Frequency | 255 kHz to 345 kHz |
| Package Type | 16‑Lead Plastic SSOP (Narrow .150 Inch) |
The LTC4006 operates with an input voltage from 6 V to 28 V.
The Imon (Pin 8) output provides a voltage proportional to the charging current.
The device can achieve a maximum duty cycle of up to 99 %.