产品概述
描述
L9961 is part of a complete battery pack monitoring, balancing, and protecting system for Li-Ion and Li-Polymer cells in 3, 4 or 5 series configurations. The L9961 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 performing also 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 I2C peripheral. The IC also integrates a dual pre-driver programmable in both HS/LS configurations for driving pack relays. L9961 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 pack controller and other external circuitry in both standby and normal operation modes. The IC protects the battery pack against over/under voltage conditions and monitors for over/under temperature. 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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所有功能
- 2 μA shipment - DEEP SLEEP mode current and 5 μA standby consumption (with VREG LDO active) standby consumption (with VREG LDO active)
- Integrated 3.3 V VREG LDO for supplying MCU and LEDs
- Measures cell voltage (3 to 5 cells), with over/undervoltage detection and balance undervoltage protection
- 12-bit voltage measurement with maximum error of ±15 mV in the [1.5 – 4.5] V range, for -40 °C < TJ < 105 °C
- Measures stack voltage, with over/under voltage detection and plausibility check vs. sum of cells
- Measures pack temperature via NTC, with over/undertemperature detection
- Ratiometric temperature measurement with ±0.8% max. gain error in the [0.2 – VREG] V range, for -40 °C < TJ < 105 °C
- Measures battery current, with Coulomb counting, overcurrent (both directions) and short-circuit in discharge protection.
- 16-bit signed current measurement with 0.1% full scale error at room temperature
- I2C peripheral for device programming and data transfers over I2C bus
- Cell balancing supporting up to 70 mA per cell
- Dual configurable HS/LS predriver for pack relay management
- Pack fuse management
- Embedded NVM for configuration parameters storage
- High hotplug robustness
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符号
封装
3D模型
质量与可靠性
| 产品型号 | Marketing Status | 包 | 等级规格 | 符合RoHS级别 | Longevity Commitment | Longevity Starting Date | 材料声明** |
|---|---|---|---|---|---|---|---|
| L9961TR | 批量生产 | VFQFPN 5X5X1 32L P0.5 | 工业 | Ecopack2 | 10 | 2023-05-04T00:00:00.000+02:00 |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持。
样片和购买
| 产品型号 | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | 包 | 包装类型 | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| L9961TR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | |||||||||||
L9961TR 批量生产