General Description

The MAX8934_ dual-input Li+/Li-Poly linear battery chargers with Smart Power SelectorK safely charge a single Li+/Li-Poly cell in accordance with JEITA recommendations. The MAX8934_monitors the battery temperature (TBATT) while charging, and automatically adjusts the

fast-charge current and charge termination voltage as the battery temperature varies. The MAX8934_ also monitors the battery temperature while the battery is discharging, and provides a warning flag (OT) to the system in the event that the battery is over temperature. Two safety profiles are supported (see Figure 6 for details). An ultra-low IQ, always-on LDO provides an additional 3.3V supply for system power.

Features

Li+ Charger with Smart Power Selector, No External MOSFETs Needed

Monitors Battery Temperature and Adjusts Charge Current and Termination Voltage Automatically per JEITA Recommendations

OT Flags System of a Hot Battery During Discharge

Ultra-Low IQ, Always-On 3.3V LDO

Common or Separate USB and Adapter Inputs

Automatic Adapter/USB/Battery Switchover

Load Peaks in Excess of Adapter Rating are Supported by Battery

Input OVP to 16V (DC) and 9V (USB)

40mI SYS-to-BATT Switch

Thermal Regulation Prevents Overheating

4.35V or 5.3V SYS Regulation Voltage

1.5A (max) USB Input Current Limit (MAX8934D)

Applications

PDAs, Palmtop, and Wireless Handhelds

Portable Media, MP3 Players, and PNDs

Digital Still Cameras and Digital Video Cameras

Handheld Game Systems