BQ79616-Q1 - 16-S ASIL-D Battery Monitor | Texas Instruments
MPN: BQ79616-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $11.95 | $5,975.00 |
| 1,000 | $10.4 | $10,400.00 |
BQ79616-Q1 Overview
A Battery Management IC (BMIC) such as the BQ79616-Q1 is a mixed-signal system IC that combines a precision analog front end, a SAR ADC, a digital post-filter, and cell-balancing FET drivers to monitor every series cell in a high-voltage battery pack. The BQ7961x family sits in the hierarchy battery monitor -> BMS AFE -> power management IC -> semiconductor; it provides the measurement plane on which the Battery Management System (BMS) host MCU executes state-of-charge, state-of-health, and cell-balancing algorithms. Within TI's broader BMS portfolio the BQ79616-Q1 is the 16-channel premium ASIL-D variant; the 14-channel BQ79614-Q1, 12-channel BQ79612-Q1, and bus-bar-only BQ79616H-Q1 share the same package footprint for PCB reuse.
Key features include: high-accuracy cell voltage measurement with integrated post-ADC low-pass filtering for DC-like SOC calculation, integrated cell-balancing FET drivers, an isolated daisy-chain communication interface that supports stacking multiple devices along a high-voltage series string, GPIO and NPN drive outputs for pack-level hardware protection, and reference designs that operate directly on 6S-16S packs without an external AFE isolator. AEC-Q100 qualification and ASIL-D capable documentation suit the part to ISO 26262 safety-critical applications.
The architecture pairs an integrated front-end RC filter network on every VC and CB channel with a precision delta-sigma ADC; commands and measurements traverse the proprietary daisy-chain up to a BQ79600-Q1 bridge device that translates the bus to UART/SPI for the host MCU. The part's flexibility supports both module-level and pack-level monitoring topologies used in modern xEV and grid-storage battery packs.
Typical applications include automotive 400V and 800V traction-battery BMS modules (HEV/PHEV/BEV), stationary battery energy storage systems (BESS), industrial e-mobility (forklifts, e-scooters), and high-voltage server backup battery racks. The 16-channel support and ASIL-D compliance make it a strong fit where cell-count scaling and functional safety paperwork are mandatory.
When designing with the BQ79616-Q1, allocate a dedicated NPN transistor for the LDOIN supply input and isolate the high-voltage battery node with a TVS and PTC as recommended in the BQ7961x-Q1 Design Recommendations application note. Unused VC and CB inputs must be tied per Section 10.2.1.2.1 of the datasheet to avoid ADC drift.
This page synthesizes TI datasheet material, distributor pricing, drop-in pin-compatible alternatives within the BQ7961x family, and practical design notes not aggregated on a single vendor page.
Drop-in alternatives for BQ79616-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with BQ79616-Q1 (same form factor and footprint) — differing in Package, Communication Interface, Functional Safety, Operating Temperature Range, Product Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BQ79614-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
BQ79612-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
BQ79616H-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
BQ79616PAPRQ1
✅ Drop-In✓ In Stock
$7.65 / Unit
View Datasheet →BQ79656-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
BQ79616-Q1 Specifications
| Function | Battery Monitor, Balancer, Integrated Protector |
| Battery Chemistry | Lithium-Ion |
| Number of Cells Supported | 6S to 16S |
| Cell Voltage Measurement Time | < 200 µs |
| Cell Input Channels (VC) | 16 |
| Cell Balancing Pins (CB) | 16 |
| Bus-Bar Sense Pins | BBP / BBN (dedicated) |
| Communication Interface | Proprietary daisy-chain (via BQ79600-Q1 bridge) |
| Functional Safety | ASIL-D capable |
| AEC-Q100 | Qualified (automotive) |
| Operating Temperature Range | -40 °C to +125 °C |
| Package | 64-HTQFP (PAPR) 10x10 mm with exposed thermal pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
BQ79616-Q1 64-htqfp (papr) 10x10 mm with exposed thermal pad Pin Configuration Guide
Pin configuration for BQ79616-Q1 (64-htqfp (papr) 10x10 mm with exposed thermal pad package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for BQ79616-Q1.
Refer to the datasheet for full pin configuration.
Typical Applications
BQ79616-Q1 is suitable for 6 applications: xEV Traction Battery Modules (400V/800V HEV/PHEV/BEV), Stationary Battery Energy Storage Systems (BESS), Industrial E-Mobility (Forklifts, E-Scooters, AGV), Server Backup and Telecom Battery Racks, Daisy-Chain Stacked Pack Monitoring, Battery Energy Storage Safety Test Rigs.
xEV Traction Battery Modules (400V/800V HEV/PHEV/BEV)
The BQ79616-Q1 delivers 16-channel cell voltage measurement in under 200 µs and ASIL-D compliance, both of which map directly onto automotive traction-battery modules where 96S or 112S stacks are built from 6S/8S sub-modules. Stacking is enabled by the proprietary daisy-chain interface, eliminating optocouplers across the high-voltage isolation barrier. Used inside each module, the device feeds SOC/SOH calculations on the host BMS MCU and drives cell-balancing FETs. The HTQFP-64 footprint also supports reusing the same PCB across 12S, 14S, and 16S BQ7961x variants, which simplifies platform reuse across vehicle programs.
Recommended
Stationary Battery Energy Storage Systems (BESS)
Grid-scale battery energy storage racks commonly group lithium cells into 48S to 200S series strings, and the BQ79616-Q1's 16-channel capacity and stackable daisy-chain interface match these architectures. Each tower's BMS card hosts a BQ79616-Q1 per module, with cell balancing and integrated hardware protection reducing external FET/comparator parts. The device's sub-200 µs conversion time keeps end-of-line balancing and SOC freshness across thousands of rack-mounted cells, while the AEC-Q100-grade temperature range tolerates outdoor enclosure thermal excursions.
Recommended
Industrial E-Mobility (Forklifts, E-Scooters, AGV)
Industrial electric mobility platforms use 48V to 96V lithium packs with 14S to 16S cells per module, exactly the cell-count range that BQ79616-Q1 was designed for. The ASIL-D safety documentation satisfies EN ISO 13849 and IEC 61508 risk assessments in industrial automation, and the integrated cell-balancing FET drivers shrink the BOM versus discrete monitor ICs. Drop-in BQ79614-Q1 and BQ79612-Q1 siblings enable product-line scaling without PCB changes when the platform matures into a 14S or 12S variant.
Recommended
Server Backup and Telecom Battery Racks
Server UPS battery cabinets and telecom DC-backup plants typically use 48V flooded or Li-ion packs of 14S to 16S, where the BQ79616-Q1's 16-cell range and ASIL-D safety pedigree outperform general-purpose analog front ends. The integrated protector outputs can disable the charger/pack contactor on cell overvoltage without host intervention, supporting fail-safe operation. Industrial-grade BQ79616PAPR lets non-automotive integrators reuse the same firmware stack with reduced documentation overhead.
Recommended
Daisy-Chain Stacked Pack Monitoring
High-voltage HEV/EV packs above 100S are built by stacking BQ79616-Q1 devices along the high-voltage string, with each monitor reading its own module and forwarding data through the daisy-chain to a single BQ79600-Q1 bridge on the low-voltage side. This topology eliminates dozens of high-voltage optocouplers, reduces PCB area, and keeps ADC sample synchronization tight across all cells. The HTQFP-64 footprint lets designers reuse one reflow layout across all module tiers.
Recommended
Battery Energy Storage Safety Test Rigs
Engineering test rigs used to characterize lithium-ion cell safety margins benefit from the BQ79616-Q1's high-accuracy measurements and integrated hardware protector trip outputs. Lab setups often parallel the device with bare reference cells to verify coulomb counting and SOC; the ASIL-D documentation streamlines validation reports. Designers typically evaluate the BQ79616EVM-021 evaluation module before committing to a custom BMS layout.
Recommended
Recommended Products Summary
Engineering reference data for BQ79616-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BQ79614-Q1 | BQ79612-Q1 | BQ79616H-Q1 | BQ79616PAPR | BQ79656-Q1 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 64-HTQFP (10x10) | 64-HTQFP (10x10) - same | 64-HTQFP (10x10) - same | 64-HTQFP (10x10) - same | 64-HTQFP (10x10) - same | 64-HTQFP (10x10) - same |
| Number of Cells Supported | 6S to 16S (16 channels) | 14 channels | 12 channels | 16 with hardware protector variant | 16 channels | 16 channels with SRP/SRN shunt sense |
| Cell Voltage Measurement Time | < 200 µs | < 200 µs | < 200 µs | < 200 µs | < 200 µs | < 200 µs |
| ASIL-D Compliance | Yes (ASIL-D capable) | Yes (ASIL-D capable) | Yes (ASIL-D capable) | Yes (ASIL-D capable) | No (industrial grade) | Yes (ASIL-D capable) |
| AEC-Q100 | Qualified (automotive) | Qualified | Qualified | Qualified | Industrial only | Qualified |
| Bus-Bar Sense Pins | BBP / BBN | BBP / BBN | BBP / BBN | Dedicated bus-bar only | BBP / BBN | SRP / SRN (shunt current sense) |
| Communication Interface | Daisy-chain (via BQ79600-Q1) | Daisy-chain | Daisy-chain | Daisy-chain | Daisy-chain | Daisy-chain |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C (industrial) | -40 °C to +125 °C |
Key Differentiators
- Full 16-channel coverage in a single IC (vs BQ79614-Q1)
- Integrated hardware protector trip outputs (vs BQ79656-Q1)
- ASIL-D capable safety documentation (vs BQ79616PAPR)
- Pin-to-pin compatible across 12S/14S/16S variants (vs Multiple BMS vendors)
Design Notes
Place the BQ79616-Q1 with the exposed thermal pad soldered to a continuous ground plane that fans out to module cooling copper. Each VC and CB input must be filtered with a differential RC network as shown in the SLVAE87 application note to suppress common-mode switching noise from adjacent cells; keep the differential trace lengths matched within 1 mm. Route the proprietary daisy-chain COMH/COML pairs as 100-ohm differential with a guard trace to prevent switching pulses from coupling into the analog inputs.
Unused VC and CB pins must be tied per Section 10.2.1.2.1 of the BQ79616-Q1 datasheet (SLUSE81E, revised November 2023). Four tie-off patterns are documented for unused channels - failure to follow them produces offset drift on the ADC and SOC miscalculations. Also ensure the LDOIN pin is biased through a dedicated NPN transistor (the EVM uses a ZTXN4004) and add a TVS + PTC at the pack HV node to survive AEC-Q100 transients.
Estimated: at a 16S lithium pack discharging at 1 C and 25 °C ambient, cell-balancing current per channel is typically on the order of 100-200 mA, so total package dissipation during balancing stays below ~0.5 W for the BQ79616-Q1 - well within the HTQFP-64 thermal envelope given a 10x10 mm PCB footprint with 1 oz copper on both layers. If your balancing currents exceed 200 mA continuously, derate the part or upsize the ground copper to maintain junction temperatures below +125 °C.
The BQ79616-Q1 daisy-chain itself is transformer-coupled and draws power from the highest-potential cell in each device's local ground, so the top-of-stack monitor sees its supply across 16 cells, not 1 cell. Designers must budget that the top monitor's analog and digital blocks share the same LDO output as the low-end monitor, and that LDO drop voltage is sized for worst-case cold cranking on automotive rails.
Compliance Information
AEC-Q100 automotive-qualified per TI product page. ASIL-D capable per the SLUSE81E datasheet. Industrial variant BQ79616PAPR is AEC-Q100 non-applicable. Halogen-free status not stated in provided data.
