Intersil’s new ISL94203 is a battery-pack monitor for lithium-ion (li-ion) batteries containing between three and eight cells. The device accurately monitors, protects and balances the cells in rechargeable battery packs to prolong their life and ensure operating and charging conditions are safe.
The ISL94203 is most suitable for li-ion battery chemistries, but also can balance and protect other chemistries.
The ISL94203’s internal state machine has five pre-programmed power states to provide for monitoring of the battery pack’s activity. The device also has a charge pump which controls the charge and load cut-off transistors, allowing a battery system’s circuitry to have a solid reference to ground.
The ISL94203 includes several programmable protection and monitoring features to safeguard battery packs from catastrophic events such as short circuits. It has an open-wire check to ensure that the IC is securely connected to the battery pack. The device also has a special protection feature which blows a polyfuse that renders the battery pack inoperable in the event of a catastrophic failure.
In addition to delivering diagnostic information, the high-voltage ISL94203 allows the circuitry to withstand battery-pack hot-plug events.
It supports the full range of li-ion chemistries. The ISL94203 can operate as a stand-alone battery management system, or be used to pass cell information to an external microcontroller.
- 14-bit ADC
- Current sensor
- Power FET control
- Temperature sensor interface
- Programmable detection/recovery times for over-voltage, under-voltage, over-current and short-circuit conditions
- Power-saving algorithm activated when battery pack is not in use
- Medical mobility carts
- Handheld vacuum cleaners
- Renewable-energy storage systems
- Power tools
- Battery back-up systems
- Electric bikes