Product overview
Description
The L9962 is part of a complete battery pack monitoring, balancing, and protection system for Li-Ion and Li-Polymer cells in 4-10 series configurations. The L9962 uses a high precision ADC to provide cell voltage, stack voltage and temperature conversion via external NTC. Voltage monitoring functions are cyclically performed with a programmable loop time. Stack current is also monitored via a high-accuracy CSA, continuously running and also performing Coulomb counting. Cell balancing is available and can be simultaneously activated on all cells. IC configuration and information exchange for SOC/SOH estimation are performed via an I2C peripheral. The IC also integrates a dual pre-driver programmable in both HS/LS configurations for driving pack relays. The L9962 also implements battery pack fuse protection to prevent fire and explosion hazards. A 3.3 V regulator with a high current capability is available for supplying the pack controller and other external circuitry in both standby and normal operation modes. The IC protects the battery pack against over-/undervoltage conditions and monitors for over-/undertemperature. It also features protection against overcurrent (both directions) and short-circuit in discharge events. Safety-relevant configurations can be stored in the internal NVM to avoid re-programming the device at each wake-up.
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All features
- 2 μA SHIPMENT - DEEP SLEEP mode current and 2.5 μA standby consumption (with VREG LDO active)
- Integrated 3.3V VREG LDO for supplying MCU and LEDs
- Measurescellvoltage(4 to 10 cells), withover-/undervoltagedetectionaswell asbalanceundervoltageprotection
- 12-bit voltage measurement with maximum error of ±7.5 mV in the [1.5 – 4.5] V range, for -40 °C < TJ < 105 °C
- Measuresstackvoltage,withover/undervoltage detection andplausibilitycheckvs.sumofcells
- Measurespacktemperaturevia NTC, withover-/undertemperaturedetection
- Ratiometric temperature measurement with ±0.8% max. gain error in the [0.2 – VREG] V range, for -40 °C < TJ < 105 °C
- Measuresbatterycurrent,with Coulombcounting,overcurrent(both directions) andshort-circuitin discharge protection.
- 16-bit signed current measurementwith amaximum error of 0.25%, for -40 °C < TJ < 120 °C after customer end of line calibration with a single point
- I2C peripheral for device programming and data transfers over the I2C bus
- Cell balancing supporting up to 70mA per cell
- Dual configurable HS/LS pre-driver for pack relay management
- Pack fuse management
- Embedded NVM for configuration parameters storage with lock functionality
- Highhot-plugrobustness
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L9962
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| L9962 | Active | TQFP 48 7x7x1.0 | Industrial | Ecopack2 | 10 | 2023-05-04T00:00:00.000+02:00 | |
| L9962-TR | Active | TQFP 48 7x7x1.0 | Industrial | Ecopack2 | 10 | 2023-05-04T00:00:00.000+02:00 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||||
| L9962-TR | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
| L9962 | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
L9962-TR Active
L9962 Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors