bq77PL157 Datasheet | Texas Instruments

.ti. bq77PL157A4225 SLUSA00B - MARCH 2010 - REVISED APRIL 2012 Voltage Protection for 3-Series to 6-Series Cell Lithium-Ion/Polymer Batteries Check for Samples: bq77PL157A4225 Features - Single IC Li-Ion Protection for 3-Series to 6Series Cells - Stackable to Protect up to 18-Series Cells - Programmable Detection Time Delay - Low Power Consumption - Typical 2-µA to 2.5-µA Normal Mode - Fixed 4.225 V Overvoltage Threshold - Highly Accurate: ±20-m V MAX, TA = 0°C to 50°C - Output Activation for Low Side FET (Contact TI for Alternate Output Options: High/Low-side Fuse or FET) - Protected Output, Power, and Ground Pins for Added Safety and Reliability - Permanent or Recoverable Fault Options - 16-pin Small Outline Package APPLICATIONS - Primary or Secondary Level Voltage Protection for Li-Ion Battery Packs for Use in: - Power Tools - UPS Systems - E-Bikes, Scooters, and Small Mobility Vehicles - Medical Devices, Test Equipment, and Industrial Products DESCRIPTION The bq77PL157 is a stackable overvoltage protection device for 3, 4, 5 or 6 series cell Li-Ion battery packs. This device incorporates a precise and accurate overvoltage detection circuit with preconfigured threshold limits. Additional Features include the ability to stack multiple parts to monitor up to 18 series cells. FUNCTION Each series cell in a Li-Ion battery pack is pared to an internal reference voltage. If one cell reaches an overvoltage condition, the protection sequence begins. The bq77PL157 starts charging an external capacitor through the CD pin. When the CD pin voltage reaches 1.2 V, the OUT pin changes state and the LVO pin bees...