BQ7695202
1 Features
Manufacturer
Texas Instruments
Category
Integrated Circuits (ICs)
Overview
Part: BQ76952 from Texas Instruments
Type: High Accuracy Battery Monitor and Protector
Key Specs:
- Battery monitoring: 3-series to 16-series cells
- Coulomb counter input offset error: < 1 μV (typical)
- Cell voltage measurement accuracy: < 10 mV (typical)
- Current measurement range: ±200 mV across sense resistor
- High-voltage tolerance: 85 V (on cell connect and select pins)
- NORMAL mode current: 286 μA
- SHUTDOWN mode current: 1 μA
Features:
- Integrated charge pump for high-side NFET protection with optional autonomous recovery
- Extensive protection suite including voltage, temperature, current, and internal diagnostics
- Two independent ADCs supporting simultaneous current and voltage sampling
- Integrated secondary chemical fuse drive protection
- Autonomous or host-controlled cell balancing
- Multiple power modes (NORMAL, SLEEP, DEEPSLEEP, SHUTDOWN)
- High-voltage tolerance of 85 V on cell connect and select additional pins
- Tolerant of random cell attach sequence on production line
- Support for temperature sensing using internal sensor and up to nine external thermistors
- Integrated one-time-programmable (OTP) memory
- Communication options: 400-kHz I2C, SPI, and HDQ one-wire interface
- Dual-programmable LDOs for external system usage
Applications:
- Battery backup unit (BBU)
- E-bike, e-scooter, and LEV
- Cordless power tools and garden tools
- Non-military drones
- Other industrial battery pack (≥10S)
Package:
- PFB (48-pin) TQFP: 7 mm × 7 mm
Features
- Battery monitoring capability for 3-series to 16 series cells
- Integrated charge pump for high-side NFET protection with optional autonomous recovery
- Extensive protection suite including voltage, temperature, current, and internal diagnostics
- Two independent ADCs
- Support for simultaneous current and voltage sampling
- High-accuracy coulomb counter with input offset error < 1 μV (typical)
- High accuracy cell voltage measurement < 10 mV (typical)
- Wide-range current applications (±200-mV measurement range across sense resistor)
- Integrated secondary chemical fuse drive protection
- Autonomous or host-controlled cell balancing
- Multiple power modes (typical battery pack operating range conditions)
- NORMAL mode: 286 μA
- Multiple SLEEP mode options: 24 μA to 41 μA
- Multiple DEEPSLEEP mode options: 9 μA to 10 μA
- SHUTDOWN mode: 1 μA
- High-voltage tolerance of 85 V on cell connect and select additional pins
- Tolerant of random cell attach sequence on production line
- Support for temperature sensing using internal sensor and up to nine external thermistors
- Integrated one-time-programmable (OTP) memory programmable by customers on production line
- Communication options include 400-kHz I2C, SPI, and HDQ one-wire interface
- Dual-programmable LDOs for external system usage
- 48-pin TQFP package (PFB)
2 Applications
- Battery backup unit (BBU)
- E-bike, e-scooter, and LEV
- Cordless power tools and garden tools
- Non-military drones
- Other industrial battery pack (≥10S)
3 Description
The Texas Instruments BQ76952 device is a highly integrated, high-accuracy battery monitor and protector for 3-series to 16-series Li-ion, Lipolymer, and LiFePO4 battery packs. The device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for autonomous or host controlled cell balancing. Integration includes high-side charge-pump NFET drivers, dual programmable LDOs for external system use, and a host communication peripheral supporting 400-kHz I2C, SPI, and HDQ one-wire standards. The BQ76952 device is available in a 48-pin TQFP package.
Device Information
| PART NUMBER(1) | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| BQ76952xx | PFB (48-pin) | 7 mm × 7 mm |
(1) See the Device Comparison Table for information on the device family. For all available devices, see the orderable addendum at the end of the data sheet.
Simplified Schematic
Applications
Pin Configuration
| Table 6-1. BQ76952 TQFP Package (PFB) Pin Functions |
|---|
| ----------------------------------------------------- |
| PIN | DESCRIPTION | |||
|---|---|---|---|---|
| NO. | NAME | I/O | TYPE | |
| 1 | VC15 | I | IA | Sense voltage input pin for the fifteenth cell from the bottom of the stack, balance current input for the fifteenth cell from the bottom of the stack, and return balance current for the sixteenth cell from the bottom of stack |
| 2 | VC14 | I | IA | Sense voltage input pin for the fourteenth cell from the bottom of the stack, balance current input for the fourteenth cell from the bottom of the stack, and return balance current for the fifteenth cell from the bottom of the stack |
| 3 | VC13 | I | IA | Sense voltage input pin for the thirteenth cell from the bottom of the stack, balance current input for the thirteenth cell from the bottom of the stack, and return balance current for the fourteenth cell from the bottom of the stack |
Table 6-1. BQ76952 TQFP Package (PFB) Pin Functions (continued)
| PIN | |
|---|---|
| NO. | NAME |
| 4 | VC12 |
| 5 | VC11 |
| 6 | VC10 |
| 7 | VC9 |
| 8 | VC8 |
| 9 | VC7 |
| 10 | VC6 |
| 11 | VC5 |
| 12 | VC4 |
| 13 | VC3 |
| 14 | VC2 |
| 15 | VC1 |
| 16 | VC0 |
| 17 | VSS |
| 18 | SRP |
| 19 | NC |
| 20 | SRN |
| 21 | TS1 |
| 22 | TS2 |
| 23 | TS3 |
| 24 | REG18 |
| 25 | ALERT |
| 26 | SCL |
BQ76952 SLUSE13B – JANUARY 2020 – REVISED NOVEMBER 2021 www.ti.com
Table 6-1. BQ76952 TQFP Package (PFB) Pin Functions (continued)
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- 48
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
| DESCRIPTION | PINS | MIN | MAX | UNIT |
|---|---|---|---|---|
| Supply voltage range | BAT | VSS–0.3 | VSS+85 | V |
| Input voltage range, VIN | PACK, LD | VSS–0.3 | VSS+85 | V |
| Input voltage range, VIN | PCHG, PDSG | the maximum of VBAT-10 or VLD-10 | VSS+85 | V |
| Input voltage range, VIN | REGIN | the maximum of VSS–0.3 or VBREG-5.5 | the minimum of VSS+6 or VBAT+0.3 or VBREG+0.3 | V |
| Input voltage range, VIN | FUSE(2) | VSS–0.3 | the minimum of VSS+20 or VBAT+0.3 | V |
| Input voltage range, VIN | BREG | the maximum of VSS–0.3 or VREGIN-0.3 | VREGIN+5.5 | V |
| Input voltage range, VIN | REG1, REG2 | VSS–0.3 | minimum of VSS+6 or VREGIN+0.3 | V |
| Input voltage range, VIN | ALERT, SCL, SDA, HDQ, CFETOFF, DFETOFF, DCHG, DDSG, RST_SHUT (3) | VSS–0.3 | VSS+6 | V |
| Input voltage range, VIN | TS1, TS2, TS3, ALERT, CFETOFF, DFETOFF, HDQ, DCHG, DDSG (when used as thermistor or general purpose ADC input) | VSS–0.3 | VREG18 + 0.3 | V |
| Input voltage range, VIN | SRP, SRN | VSS–0.3 | VREG18 + 0.3 | V |
| Input voltage range, VIN | VC16 | maximum of VSS-0.3 and VC15–0.3 | VSS+85 | V |
| Input voltage range, VIN | VC15 | maximum of VSS-0.3 and VC14–0.3 | VSS+85 | V |
| Input voltage range, VIN | VC14 | maximum of VSS-0.3 and VC13–0.3 | VSS+85 | V |
| Input voltage range, VIN | VC13 | maximum of VSS-0.3 and VC12–0.3 | VSS+85 | V |
| Input voltage range, VIN | VC12 | maximum of VSS-0.3 and VC11–0.3 | VSS+85 | V |
| Input voltage range, VIN | VC11 | maximum of VSS-0.3 and VC10–0.3 | VSS+85 | V |
| Input voltage range, VIN | VC10 | maximum of VSS-0.3 and VC9–0.3 | VSS+85 | V |
| Input voltage range, VIN | VC9 | maximum of VSS-0.3 and VC8–0.3 | VSS+85 | V |
| Input voltage range, VIN | VC8 | maximum of VSS-0.3 and VC7–0.3 | VSS+85 | V |
Recommended Operating Conditions
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| VBAT | Supply voltage | 4.7 | 80 | V | |
| VBAT | Supply voltage(4) | 10 | 12 | V | |
| TOTP | OTP programming temperature(4) | -40 | 45 | °C | |
| VPORA | Power-on reset | 3 | 4 | V | |
| VPORA_HYS | Device shuts down when BAT < VPORA - VPORA_HYS | 180 | mV | ||
| VW |
Thermal Information
| THERMAL METRIC(1) | BQ76952 | UNIT | |
|---|---|---|---|
| PFB (TQFP) 48 PINS | |||
| RθJA | Junction-to-ambient thermal resistance | 66.0 | °C/W |
| RθJC(top) | Junction-to-case (top) thermal resistance | 19.6 | °C/W |
| RθJB | Junction-to-board thermal resistance | 29.3 | °C/W |
| ΨJT | Junction-to-top characterization parameter | 0.8 | °C/W |
| ΨJB | Junction-to-board characterization parameter | 29.1 | °C/W |
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| BQ76952 | Texas Instruments | — |
| BQ7695201 | Texas Instruments | — |
| BQ7695203 | Texas Instruments | — |
| BQ7695204 | Texas Instruments | — |
| BQ76952PFBR | Texas Instruments | 48-TQFP |
| BQ76952PFBR.A | Texas Instruments | — |
| BQ76952XX | Texas Instruments | — |
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