The NCS35011 is an ultra−low power protection integrated circuit

managing lithium−ion batteries from 3 to 5 cells in series with accurate

battery voltage indication up to 5 LED outputs.

Each cell in the battery pack is monitored for an over−voltage and

under−voltage condition. Upon detecting an over−voltage, the ODI

pin will assert indicating a fault condition and stay asserted until the

fault is cleared. During an under voltage condition, the UDI pin will

also assert indicating the fault but will have a pulse width that is

pre−set in the protector. Both over and under voltage detections have a

hard coded pre−set delay time before fault indication.

Pulling the ENB high will start a measurement of the battery pack

voltage which will be compared to a pre−set detection threshold table.

If a threshold voltage is exceeded the protector will power the

corresponding LED to indicate state of charge of the pack.

Hardware protection and battery monitoring run autonomously and

allows operation without a microcontroller.

Features

• Over−Voltage (OV) and Under−Voltage (UV) Detection

• Protection for 3, 4 and 5 Series Cells

• State of Charge (SoC) Indication with High Voltage Tolerant LED

Drivers

• Configurable Fault Outputs (Active High or Low for Push−Pull or

Open Drain)

• High−Accuracy Voltage Measurement ±5 mV

• Low Power Consumption Icc = 4 A

• Input BAT Voltage Range 5 V to 28 V, tolerant to 70 V for

Increased Immunity to Surge

• Extended Junction Temperature Range to 125°C

• These Devices are Pb−Free and are RoHS Compliant

Applications

• Secondary Protection

• Power and Gardening Tools

• Portable/Autonomous Equipment (Cleaners, Mowers, Motive,

Medical)