My Inquiry
My Account
Texas Instruments BQ34Z110PWR
- Part No.:
- BQ34Z110PWR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ34Z110PWR.pdf
- Description:
- IC FUEL GAUGE LEAD ACID 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:221
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ34Z110PWR from Texas Instruments is a standalone fuel gauge IC for lead-acid battery packs, delivering ±1% state-of-charge accuracy via patented Impedance Track™ technology. It operates across 4 V–64 V battery systems, supports >65 Ah capacity and >32 A charge/discharge currents, and integrates coulomb counting, temperature compensation (via external NTC or internal sensor), and SHA-1/HMAC authentication - deployed in UPS, power tools, and light electric vehicles.
For engineers reviewing the BQ34Z110PWR datasheet, BQ34Z110PWR pinout, BQ34Z110PWR application, or BQ34Z110PWR equivalent, this page delivers verified technical context, real-world interface behavior (I²C/HDQ), power-mode trade-offs (NORMAL/SLEEP/FULL SLEEP), LED display control options, and authentic alternative part comparisons - all grounded in TI's SLUSB55B revision May 2013 specification.
Technical Context
The BQ34Z110PWR implements a dual-oscillator architecture: a 32.768 kHz low-frequency oscillator for timing-critical gauging functions and an 8.389 MHz high-frequency oscillator for firmware execution. Its integrating ADC provides 14–15-bit resolution for both coulomb counting (SRP/SRN inputs) and analog sensing (TS, BAT), with <10 µV input offset on the current-sense path and <1 mV on temperature/cell voltage paths.
It executes Impedance Track™ algorithm autonomously - using OCV-voltage correlation, aging/self-discharge compensation, and dynamic Qmax updates - without host processor intervention. Communication occurs via I²C (400 kHz, open-drain SDA/SCL) or HDQ (single-wire, 190–250 µs cycle time), with dedicated Alert output and four direct LED drive pins configurable for 1–4 LED or expanded multi-LED displays using SN74HC164 shift registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Battery Voltage Range | 4 V to 64 V supported via external voltage translation circuit - enables use in 12 V to 48 V lead-acid systems with automatic power-saving control of divider network. |
| Current Sensing | Integrating ADC with ±0.125 V input range (SRP–SRN), 14–15-bit resolution, and <10 µV offset - ensures accurate coulomb counting at high currents (>32 A) with minimal sense resistor loss. |
| Power Modes | NORMAL: <140 µA avg; SLEEP: <64 µA avg; FULL SLEEP: <19 µA avg - enables multi-year battery pack runtime in standby without compromising gauging accuracy. |
| Communication Interfaces | I²C slave (400 kHz, open-drain) and HDQ single-wire (190–250 µs cycle) - provides host flexibility while maintaining secure, low-pin-count connectivity to microcontrollers or battery management hosts. |
| Fuel Gauge Accuracy | ±1% state-of-charge error across operating conditions - achieved via Impedance Track™ algorithm using voltage, temperature, load, and aging models stored in non-volatile flash. |
| Authentication | SHA-1/HMAC engine with scratch pad and challenge-response protocol - enables secure battery pack identification and counterfeit protection in OEM applications. |
| Temperature Sensing | Supports Semitec 103AT-type NTC thermistor or internal sensor - allows precise thermal modeling for SoC correction and over-temperature protection during charge/discharge. |
Pinout & Package
Package: 14-pin TSSOP (PW), 5.0 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1 | LED 1 driver / Not used | Active-high output for direct LED control in single-LED mode; requires external N-FET for current limiting per Figure 9. |
| P2 | LED 2 driver / Not used | Active-high output for second LED in two-LED configuration; tied to VSS if unused. |
| BAT | Translated battery voltage input | Accepts scaled-down battery voltage (4–64 V range) from external resistor divider - enables wide-input operation with low quiescent current. |
| CE | Chip enable | Drives internal LDO off when low - reduces system power consumption by disconnecting REGIN supply path. |
| REGIN | LDO input | 3.6 V nominal input for internal 2.5 V regulator; decoupled with 0.1 µF ceramic capacitor to VSS. |
| REG25 | 2.5 V LDO output | Stable 2.5 V supply for internal circuitry; decoupled with 1 µF ceramic capacitor to VSS. |
| VSS | Ground reference | Common return for analog and digital sections - must be connected to system ground with low-impedance path. |
| SRP / SRN | Coulomb counter inputs | Differential analog inputs for sense resistor voltage (SRP nearest BAT–, SRN nearest PACK–); support sub-mV resolution for high-current monitoring. |
| P6/TS | Thermistor sense input | Analog input for 103AT-type NTC thermistor - provides temperature data for Impedance Track™ thermal compensation and safety thresholds. |
| P5/HDQ | HDQ serial I/O | Open-drain bidirectional single-wire interface - supports host communication without clock line; requires pull-up to VCC. |
| P4/SCL | I²C clock input / LED 4 | Input for I²C clock (requires 10 kΩ pull-up); doubles as active-high LED 4 driver in four-LED mode. |
| P3/SDA | I²C data I/O / LED 3 | Open-drain I²C data line (requires 10 kΩ pull-up); doubles as active-high LED 3 driver in four-LED mode. |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Algorithm | Autonomous SoC estimation with ±1% accuracy across temperature, aging, and load - eliminates need for host-based modeling or periodic full re-calibration. |
| Multi-Mode Power Management | Three distinct operating modes (NORMAL/SLEEP/FULL SLEEP) with automatic transitions - extends battery life in always-connected applications like UPS and medical devices. |
| Flexible LED Display Control | Direct drive for 1–4 LEDs plus port expander support (e.g., SN74HC164) - enables scalable state-of-charge indication without external MCU GPIO overhead. |
| Secure Authentication | On-chip SHA-1/HMAC engine with programmable keys and scratch pad - prevents unauthorized battery replacement and enforces OEM pack authenticity. |
| Wide-Range Analog Sensing | Integrated 14–15-bit ADCs for current (SRP/SRN), temperature (TS), and battery voltage (BAT) - reduces BOM count and PCB area versus discrete sensing solutions. |
Applications
| Uninterruptible Power Supplies (UPS) | Power Tools |
|---|---|
|
Use Scenario: Monitoring 24 V or 48 V sealed lead-acid backup batteries during grid outage and recharge cycles. IC Role / Device Role / Timing Role: Standalone fuel gauge performing autonomous coulomb counting, OCV-based SoC prediction, and temperature-compensated aging modeling - no host intervention required. Use Value: Delivers ±1% remaining capacity accuracy over 500+ cycles, enabling precise runtime forecasting and preventing unexpected shutdowns during critical loads. |
Use Scenario: Tracking state-of-charge in cordless drill/driver packs subjected to high-pulse discharge (up to 32 A) and rapid temperature rise. IC Role / Device Role / Timing Role: Real-time current integration and dynamic impedance tracking during burst loads - uses internal temperature sensor and fast ADC sampling to correct SoC mid-discharge. Use Value: Maintains accuracy under transient loads where conventional voltage-only gauges drift >10%, extending usable tool runtime and reducing false "low-battery" warnings. |
| Light Electric Vehicles (LEVs) | Medical Instrumentation |
|
Use Scenario: Gauging 36 V or 48 V lead-acid traction batteries in e-bikes and scooters with regenerative braking and variable load profiles. IC Role / Device Role / Timing Role: Autonomous fuel gauge interfacing via HDQ to vehicle controller - handles bidirectional current flow, self-discharge compensation, and pack-level thermistor feedback. Use Value: Enables accurate range estimation despite aggressive cycling and ambient temperature swings (-20°C to 60°C), improving user confidence and service planning. |
Use Scenario: Monitoring sealed lead-acid batteries in portable ultrasound, infusion pumps, and defibrillators requiring FDA-compliant runtime assurance. IC Role / Device Role / Timing Role: Safety-critical SoC monitor with SHA-1 authentication - validates battery origin and logs usage history in non-volatile flash for auditability. Use Value: Meets IEC 62304 software lifecycle requirements by providing traceable, tamper-resistant battery health data - supports regulatory submission and field failure analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ34Z100PWR | Same pinout and firmware architecture but lacks SHA-1/HMAC authentication and has reduced flash memory (no user-programmable 32-byte space). | Suitable for cost-sensitive, non-secure applications where battery authentication is not required - e.g., consumer-grade power tools. | Select BQ34Z100PWR only if cryptographic security and extended data logging are unnecessary; verify compatibility with existing firmware and calibration workflows. |
| MAX17205G+T | Li-ion optimized; no native lead-acid chemistry support; uses ModelGauge m5 algorithm instead of Impedance Track™; different I²C register map and command structure. | Designed for lithium-based packs - unsuitable for lead-acid voltage ranges or OCV-based aging models; requires full firmware redesign for migration. | Choose MAX17205G+T only when migrating to Li-ion battery systems; do not substitute into lead-acid designs due to fundamental chemistry mismatch and parameter incompatibility. |
Compared with BQ34Z110PWR, BQ34Z100PWR offers identical gauging performance but omits security features and user flash, while MAX17205G+T targets entirely different chemistries and cannot replicate lead-acid-specific functions like voltage translation control or Impedance Track™ aging compensation.
Availability
BQ34Z110PWR is available at Aetrix Electronics and suitable for uninterruptible power supplies, power tools, and light electric vehicles requiring stable component supply, long-term lifecycle support, and consistent lead-acid battery gauging performance.
Supply support for BQ34Z110PWR 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 - serving automotive, industrial, and communications markets with high-reliability components.
The BQ34Z110PWR belongs to TI's Impedance Track™ fuel gauge product line, engineered specifically for accurate, autonomous state-of-charge estimation in lead-acid battery systems - emphasizing low-power operation, wide voltage range, and robustness in harsh environments.
FAQ
What battery chemistries does the BQ34Z110PWR support?
The BQ34Z110PWR is explicitly designed for lead-acid battery chemistries, including flooded, AGM, and gel types. It does not support lithium-ion, NiMH, or other chemistries - its Impedance Track™ algorithm, voltage translation circuit, and default parameters are calibrated for lead-acid OCV profiles and aging characteristics. Using it with non-lead-acid cells will result in inaccurate SoC reporting and potential safety risks.
How does the BQ34Z110PWR achieve ±1% state-of-charge accuracy?
The BQ34Z110PWR achieves ±1% state-of-charge accuracy through its proprietary Impedance Track™ algorithm, which correlates real-time voltage, current, temperature, and load history against stored lead-acid electrochemical models. This includes aging compensation, self-discharge modeling, and dynamic Qmax updates - all executed autonomously using on-chip 14–15-bit ADCs and 32 bytes of user-programmable flash memory for calibration data.
Can the BQ34Z110PWR operate directly from a 48 V battery without external components?
No - the BQ34Z110PWR cannot connect directly to 48 V. Its BAT pin accepts only translated voltages (typically 0–5 V) generated by an external resistor divider. The device includes VEN pin control to switch that divider on/off, reducing quiescent current. Full 4 V–64 V support requires proper external scaling and regulation, as specified in TI's SLUSB55B Figure 2 implementation guide.
What are the key differences between NORMAL, SLEEP, and FULL SLEEP modes on the BQ34Z110PWR?
NORMAL mode draws <140 µA and enables full functionality including continuous coulomb counting and communication. SLEEP mode (<64 µA) suspends non-essential circuits while retaining RAM and basic timing. FULL SLEEP (<19 µA) disables the high-frequency oscillator - increasing I²C response latency by 6–8 ms and dropping one HDQ message - ideal for ultra-low-power standby where infrequent polling is acceptable.
Does the BQ34Z110PWR require calibration during production?
Yes - the BQ34Z110PWR requires board-level and coulomb counter offset calibration during manufacturing, performed using ENTER_CAL, OFFSET_CAL, and CC_OFFSET_SAVE commands. These steps compensate for PCB layout parasitics and sense resistor tolerances. TI recommends executing calibration at room temperature with zero load before sealing the device in SEALED mode for end-equipment deployment.
BQ34Z110PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Impedance Track™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lead Acid
- Number of Cells:
- -
- Fault Protection:
- -
- Interface:
- HDQ, I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
BQ34Z110PWR FAQ
1.How can I place an order for BQ34Z110PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ34Z110PWR 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 BQ34Z110PWR reliable?
The price and inventory of BQ34Z110PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ34Z110PWR is usually 5 days.
3.What payment methods are accepted for BQ34Z110PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ34Z110PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ34Z110PWR?
BQ34Z110PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ34Z110PWR 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 BQ34Z110PWR?
For technical support, including BQ34Z110PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ34Z110PWR requirements.
6.How does Aetrix verify that BQ34Z110PWR is sourced from the original manufacturer or authorized distributors?
All BQ34Z110PWR 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 BQ34Z110PWR meets industry standards.
7.What is the process for return or replacement of BQ34Z110PWR?
All BQ34Z110PWR units undergo pre-shipment inspection (PSI). If there is an issue with BQ34Z110PWR, 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 BQ34Z110PWR part is unused and in its original packaging.
Return procedure for BQ34Z110PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ34Z110PWR 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…
