Key Selection Information
| Parameter | Verified Information |
|---|---|
| Exact MPN | BQ76952PFBR |
| Battery Stack | 3 to 16 series cells |
| Supported Chemistries | Li-Ion, Li-Polymer and LiFePO4 |
| Cell Voltage Accuracy | <10 mV typical stated feature |
| Coulomb-Counter Input Offset | <1 ?V typical |
| Current-Sense Range | ?200 mV across the external sense resistor |
| Protection-FET Drive | Integrated charge pump for high-side N-channel FETs |
| Cell Balancing | Autonomous or host controlled |
| Temperature Sensing | Internal sensor plus up to nine external thermistors |
| Interfaces | 400 kHz I?C, SPI and HDQ one-wire |
| Package / Packing | 48-pin TQFP (PFB), 1000-piece large tape and reel |
| Operating Temperature | -40?C to +85?C |
| Status | Active |
Product Overview
BQ76952PFBR combines 3S-to-16S cell monitoring, current measurement, configurable protection, high-side NFET control, temperature sensing and cell balancing in a 48-pin battery-management IC. The two measurement headlines that most directly affect pack accuracy are TI’s <10 mV typical cell-voltage accuracy feature and <1 ?V typical coulomb-counter input offset.
The ?200 mV current-sense range is measured across an external shunt, so the selected shunt value sets the tradeoff between measurable pack current, low-current signal level and I?R loss. That design choice affects both protection thresholds and coulomb counting and should be fixed together rather than treated as an isolated component parameter.
BQ76952 also integrates a charge pump for high-side N-channel protection FETs and supports autonomous or host-controlled cell balancing. Customer-programmable OTP can store production configuration, which can reduce dependence on host initialization but makes programming verification a manufacturing-control step because OTP is not ordinary rewritable memory.
Design Considerations
- Select the current-sense resistor from full-scale current, measurement resolution and power-loss requirements.
- Define which protections run autonomously and which remain host managed before firmware architecture is frozen.
- Plan high-side FET, precharge/predischarge and fault-recovery behavior together with the monitor configuration.
- Program OTP only after configuration has been validated and production version control is in place.
Related Engineering Resources
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