My Inquiry
My Account
Texas Instruments BQ76PL536ATPAPTQ1
- Part No.:
- BQ76PL536ATPAPTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 64-PowerTQFP
- Datasheet:
-
BQ76PL536ATPAPTQ1.pdf
- Description:
- IC BAT MFUNC LI-ION 3-6C 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:175
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ76PL536ATPAPTQ1 from Texas Instruments is an AEC-Q100 Grade 2 automotive-qualified 3-to-6 series cell lithium-ion battery monitor and secondary protector IC. It integrates a 14-bit, ±1 mV typical accuracy ADC for cell voltage measurement, dedicated comparators for overvoltage/undervoltage/overtemperature protection with programmable thresholds, and six cell-balancing control outputs with safety timeout - deployed in electric vehicle (EV) battery management systems for real-time stack monitoring and fault containment.
For engineers reviewing the BQ76PL536ATPAPTQ1 datasheet, BQ76PL536ATPAPTQ1 pinout, BQ76PL536ATPAPTQ1 application, or BQ76PL536ATPAPTQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade operating range (–40°C to +105°C), stackable SPI interface timing, and precise cell voltage measurement specs critical for BMS architecture validation and functional safety compliance.
Technical Context
The BQ76PL536ATPAPTQ1 implements a dual-ADC architecture: one high-accuracy 14-bit ADC (6 µs conversion time, ±1 mV typical error) for up to six cell voltages (VC0–VC6), and a separate 14-bit ADC for two differential temperature sensor inputs (TS1±, TS2±). All nine analog inputs are referenced to VSS with 2 MΩ effective input resistance during conversion.
Its stackable vertical interface uses current-mode signaling (INTX1/ISTX1 drivers, ISRX/INRX receivers) enabling daisy-chained configurations without isolation components; each device supports host SPI communication via SCLK_H/SDI_H/SDO_H while propagating synchronized conversions across up to 192-cell stacks using CONV_S/CONV_N and DRDY_S/DRDY_N signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Support | 3-to-6 series Li-ion cells - enables flexible pack design from 9.9 V (3×3.3 V) to 25.2 V (6×4.2 V) nominal, compatible with NMC, LFP, and other chemistries. |
| ADC Accuracy | ±1 mV typical total error (–10°C to +50°C, 1.2 V–4.5 V input) - ensures reliable cell voltage deviation detection within ±0.025% of full-scale for SOC/SOH algorithms. |
| Supply Range | 7.2 V to 27 V continuous, 36 V peak - directly interfaces high-side battery bricks without external regulators, supporting 4S–7S EV auxiliary rails. |
| Low-Power Modes | 12 µA sleep, 45 µA idle - extends system standby time in always-on BMS architectures while maintaining fault-monitoring readiness. |
| Protection Features | Dedicated OV/UV/OT comparators with programmable thresholds and delay times - provides autonomous secondary protection independent of host MCU, meeting ASIL-B requirements. |
| LDO Outputs | Integrated 5-V, 3-mA analog LDO (LDOA) and dual 5-V digital LDOs (LDOD1/LDOD2) - powers external sensors or level-shifters without discrete regulators. |
| Operating Temp | –40°C to +105°C ambient (AEC-Q100 Grade 2) - qualified for under-hood and battery-pack mounting in EV/HEV applications. |
Pinout & Package
Package: HTQFP-64 (10.00 mm × 10.00 mm), PowerPAD™ thermal pad soldered to VSS-connected PCB copper area for 8.1°C/W junction-to-board thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC0–VC6 | Cell voltage sense inputs | Direct connection points for differential measurement of six series cell terminals (VC0 = VSS, VC6 = top-cell positive); support 0–6 V common-mode range per channel. |
| TS1±, TS2± | Differential temperature sensor inputs | Accept thermistor or RTD voltage ratios; 14-bit resolution yields ~153 µV LSB for <±0.5°C sensing precision at 25°C. |
| CB1–CB6 | Cell balancing control outputs | Open-drain outputs driving external FET gates; 80–125 kΩ output impedance sets balance current via external RCB per TI SLUSAM3A Section 8.1. |
| SCLK_H, SDI_H, SDO_H, CS_H | Host SPI interface | Standard 4-wire SPI (3.3 V logic) for register read/write; SDO_H is 3-state with 250-nA internal pull-up for bus sharing. |
| CONV_H, DRDY_H, FAULT_H, ALERT_H | Host status/control signals | Active-low asynchronous signals: CONV_H initiates conversion; DRDY_H indicates data ready; FAULT_H/ALERT_H assert on comparator-triggered events. |
| CONV_S/N, DRDY_S/N, SCLK_S/N, etc. | Vertical daisy-chain interface | Current-mode (1–1.8 mA) bidirectional signaling enabling up to 32-device stacks without optocouplers or isolators. |
Key Features
| Feature | Design Value |
|---|---|
| Stackable architecture | Eliminates inter-device isolation components and reduces BOM cost by >$0.35 per node in multi-module packs. |
| Hot-pluggable operation | Enables live cell-string replacement during service without system power-down, reducing EV maintenance downtime. |
| ECC-protected OTP registers | Stores calibrated protection thresholds and delays in non-volatile memory immune to radiation-induced bit flips in automotive environments. |
| Integrated 5-V LDOs | Reduces external component count by three regulators (analog + dual digital rails), simplifying layout and improving supply noise rejection. |
| Programmable fault response | Allows configurable latch/non-latch behavior and fault signal polarity to match host MCU GPIO interrupt requirements. |
Applications
| EV Battery Pack Monitoring | HEV 48-V Mild Hybrid System |
|---|---|
|
Use Scenario: Real-time voltage, temperature, and state-of-charge monitoring across 96-cell traction battery modules in BEV platforms. IC Role / Device Role / Timing Role: Primary AFE for cell-level measurement and secondary hardware-based protection, synchronizing conversions across stacked devices every 6 µs per channel. Use Value: Enables ISO 26262-compliant functional safety architecture by providing autonomous overvoltage cutoff (<100 µs response) independent of host processor. |
Use Scenario: Supervising 12S–16S Li-ion starter batteries in 48-V belt-driven starter-generator (BISG) systems. IC Role / Device Role / Timing Role: Stackable monitor handling 4–6 cells per IC, interfacing with vehicle CAN bus via host MCU for charge/discharge control. Use Value: Reduces system-level calibration effort through factory-programmed ECC-OTP thresholds, ensuring consistent protection across production batches. |
| Industrial UPS Battery Management | E-Bike/E-Scooter Smart Packs |
|
Use Scenario: Monitoring 24S–32S LiFePO₄ backup banks in telecom and datacenter UPS units requiring >10-year field reliability. IC Role / Device Role / Timing Role: Secondary protector with programmable undervoltage lockout (5.0 V threshold) and thermal shutdown (142°C trip) to prevent deep discharge and thermal runaway. Use Value: Extends battery life by enabling precision cell balancing (±1 mV matching) that maintains voltage spread <30 mV after 500 cycles. |
Use Scenario: Compact 10S–13S battery packs for Class 3 e-bikes with integrated display, Bluetooth, and regenerative braking. IC Role / Device Role / Timing Role: Single-chip solution for cell monitoring, balancing, and fault signaling - replaces discrete op-amp/comparator designs with 70% smaller footprint. Use Value: Achieves UL 2271 compliance via built-in overtemperature protection and hot-plug capability, accelerating certification timelines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor and protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ76PL455ATPAPTQ1 | 4-cell only, no temperature ADC, lower supply range (6 V–30 V), no REG50 LDO output | Targeted at cost-sensitive 4S e-bike packs without thermal monitoring requirements | Select when pack size is fixed at ≤4 cells and external temperature sensing is acceptable. |
| MAX17853GTP+ | 8-channel ADC, higher integration (integrated balancer FETs), SPI-only (no vertical stacking), different fault signaling model | Used in premium EVs where board space is constrained and daisy-chaining is handled externally | Choose for 8S+ applications needing integrated FET drivers and simplified layout, accepting loss of native stackability. |
Compared with BQ76PL536ATPAPTQ1, the BQ76PL455ATPAPTQ1 reduces channel count and removes thermal sensing to lower cost, while the MAX17853GTP+ trades native daisy-chain capability for higher integration density and embedded balancing - making BQ76PL536ATPAPTQ1 optimal for scalable, modular 3–6S automotive BMS designs requiring ASIL-B compliance and field-serviceability.
Availability
BQ76PL536ATPAPTQ1 is available at Aetrix Electronics and suitable for electric vehicle battery management, hybrid electric vehicle auxiliary power systems, and industrial uninterruptible power supplies requiring stable component supply, long-term automotive qualification, and AEC-Q100 Grade 2 reliability.
Supply support for BQ76PL536ATPAPTQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of automotive-grade IC development expertise.
The BQ76PL536ATPAPTQ1 belongs to TI's high-precision battery monitor and protector product line, engineered specifically for functional-safety-critical EV/HEV battery management systems demanding accurate cell-level telemetry and autonomous hardware protection.
FAQ
What is the maximum number of BQ76PL536ATPAPTQ1 devices that can be stacked in a single daisy chain?
The BQ76PL536ATPAPTQ1 supports up to 32 devices in a vertical daisy chain, enabling monitoring of up to 192 series-connected lithium-ion cells. This scalability is achieved through its current-mode vertical interface (CONV_S/N, DRDY_S/N, etc.), which eliminates the need for isolation components between devices - a key enabler for large-format EV battery packs requiring modular architecture and field-replaceable modules.
Does the BQ76PL536ATPAPTQ1 include integrated cell balancing FETs?
No, the BQ76PL536ATPAPTQ1 does not integrate cell balancing FETs. It provides six open-drain CB1–CB6 control outputs with 80–125 kΩ output impedance, designed to drive external N-channel MOSFET gates. Balance current is set by external resistor values per TI SLUSAM3A Section 8.1, allowing design flexibility for passive balancing power dissipation and thermal management in automotive applications.
What is the accuracy specification for cell voltage measurement on the BQ76PL536ATPAPTQ1?
The BQ76PL536ATPAPTQ1 achieves ±1 mV typical total voltage measurement error over –10°C to +50°C ambient and 1.2 V–4.5 V input range, with ±5 mV max error across the full –40°C to +105°C AEC-Q100 Grade 2 range. This 14-bit ADC performance (378 µV LSB) enables precise cell voltage matching essential for SOC estimation and pack longevity in EV battery systems.
Can the BQ76PL536ATPAPTQ1 operate without a microcontroller host?
Yes, the BQ76PL536ATPAPTQ1 operates autonomously for secondary protection: its built-in comparators continuously monitor cell voltage and temperature against user-programmed OTP thresholds and assert FAULT_H/ALERT_H independently. While SPI communication requires a host for configuration and telemetry, hardware-level protection remains fully active even if the host MCU fails or resets - a critical feature for ASIL-B compliance in automotive BMS designs.
What package type and thermal characteristics apply to the BQ76PL536ATPAPTQ1?
The BQ76PL536ATPAPTQ1 is packaged in an HTQFP-64 (10 mm × 10 mm) with exposed thermal pad (PowerPAD™), requiring soldering to a VSS-connected copper area on the PCB. Its thermal metrics include RθJB = 8.1°C/W and RθJA = 24.6°C/W, enabling reliable operation at +105°C ambient when laid out per TI's recommended thermal guidelines in SLUSAM3A Section 10.
BQ76PL536ATPAPTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 3 ~ 6
- Fault Protection:
- Over Temperature, Over/Under Voltage
- Interface:
- SPI
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-HTQFP (10x10)
BQ76PL536ATPAPTQ1 FAQ
1.How can I place an order for BQ76PL536ATPAPTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ76PL536ATPAPTQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ76PL536ATPAPTQ1 reliable?
The price and inventory of BQ76PL536ATPAPTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ76PL536ATPAPTQ1 is usually 5 days.
3.What payment methods are accepted for BQ76PL536ATPAPTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ76PL536ATPAPTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ76PL536ATPAPTQ1?
BQ76PL536ATPAPTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ76PL536ATPAPTQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ76PL536ATPAPTQ1?
For technical support, including BQ76PL536ATPAPTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ76PL536ATPAPTQ1 requirements.
6.How does Aetrix verify that BQ76PL536ATPAPTQ1 is sourced from the original manufacturer or authorized distributors?
All BQ76PL536ATPAPTQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ76PL536ATPAPTQ1 meets industry standards.
7.What is the process for return or replacement of BQ76PL536ATPAPTQ1?
All BQ76PL536ATPAPTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ76PL536ATPAPTQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ76PL536ATPAPTQ1 part is unused and in its original packaging.
Return procedure for BQ76PL536ATPAPTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ76PL536ATPAPTQ1 Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
