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Texas Instruments BQ2023PWR
- Part No.:
- BQ2023PWR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ2023PWR.pdf
- Description:
- IC BATT MON LI-ION 1CELL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,497
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Product details
Overview
BQ2023PWR from Texas Instruments is a multifunction battery monitoring IC designed for single-cell Li-ion/Li-polymer battery packs. It performs high-accuracy coulomb counting via differential current sensing (SRP/SRN), integrates an internal temperature sensor (0.25°K resolution), and communicates over SDQ single-wire interface. It delivers state-of-charge information to host controllers in portable electronics such as cellular phones and PDAs.
For engineers reviewing the BQ2023PWR datasheet, BQ2023PWR pinout, BQ2023PWR application, or BQ2023PWR equivalent, key selection considerations include its 3.05 µVh charge/discharge resolution, 2.4 V minimum supply operation, automatic offset calibration, 224-byte flash memory, and sleep-mode current of 1.5 µA - all critical for low-power, precision gas-gauge designs.
Technical Context
The BQ2023PWR implements voltage-to-frequency conversion (VFC) to integrate differential sense voltage (±100 mV range) into charge/discharge counts at 3.05 µVh/LSB resolution. Its internal timebase eliminates external crystal requirements, and continuous auto-calibration compensates VFC offset drift hourly.
It operates in two power states: normal mode (40 µA ICC) with full register access (DCR, CCR, DTC, CTC, TEMPH/TEMPL), and sleep mode (1.5 µA) retaining only SDR, TEMPH, and TEMPL. Entry is triggered either by PDET pin low or SDQ inactivity + WOE threshold crossing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.4 V to 5.0 V - supports direct connection to single-cell Li-ion (2.7–4.2 V) without LDO; flash write requires ≥2.8 V. |
| Coulomb Counting Resolution | 3.05 µVh/LSB - enables sub-milliamp-hour accuracy over multi-hour discharge cycles with typical 0.02 Ω sense resistor. |
| Current Sense Input Range | ±100 mV differential (SRP–SRN) - accommodates ±5 A sensing with 20 mΩ resistor, covering most portable battery currents. |
| Temperature Sensing | 0.25°K resolution, ±4°K accuracy - replaces external thermistor, reducing BOM count and PCB area in compact battery packs. |
| SDQ Interface Compatibility | Dallas 1-Wire® compatible - allows daisy-chaining multiple BQ2023PWR devices on one bus, simplifying multi-pack or modular battery systems. |
| Memory Resources | 224 bytes flash (7 × 32-byte pages), 32 bytes RAM, 8-byte secure ID ROM - stores calibrated gas-gauge parameters, serial IDs, and warranty data persistently across deep discharge. |
| Sleep Current | 1.5 µA - extends shelf life of sealed battery packs; enabled automatically on PDET low or after ~1 hour idle current below WOE threshold. |
Pinout & Package
Package: 8-lead TSSOP (PW), 3.0 mm × 4.4 mm, 0.65 mm pitch, moisture sensitivity level 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PDET (Pin 5) | Pack removal detection input | Active-low signal that forces immediate sleep mode and disables STAT output - ensures safe shutdown when battery is disconnected from host system. |
| RBI (Pin 1) | Register backup I/O | Provides VCC backup path during brownout (<2.0 V POR); maintains RAM/register state using external capacitor - prevents gas-gauge data loss during transient power loss. |
| SDQ (Pin 4) | Single-wire bidirectional data I/O | 1-Wire-compatible bus interface; requires 5 kΩ pullup; supports presence detection, ROM commands, and memory read/write with CRC validation. |
| SRP (Pin 7) / SRN (Pin 6) | Differential current sense inputs | High-impedance (10 MΩ) inputs measuring voltage drop across pack-side sense resistor - enables accurate bidirectional current integration without loading the sense node. |
| STAT (Pin 8) | Open-drain status output | Drives external LED or host interrupt; pulled low during normal operation; disabled in sleep mode - provides visual/system-level battery presence/status indication. |
| VCC (Pin 2) / VSS (Pin 3) | Power supply and ground | Operates down to 2.4 V; internal POR triggers at 2.0–2.34 V - ensures reliable initialization across full Li-ion voltage range including end-of-discharge. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor | Eliminates need for external thermistor and associated routing, reducing component count and thermal measurement error in tight-pack layouts. |
| Automatic VFC offset calibration | Performs hourly self-calibration and continuous compensation - maintains <±15.8 µV offset across temperature and supply, ensuring long-term SoC accuracy. |
| Programmable digital output port | STAT pin functions as configurable open-drain indicator - supports host-driven status signaling (e.g., charging/discharging/fault) without additional logic. |
| Differential current sensing | Rejects common-mode noise and ground bounce in battery-pack environments - improves measurement stability versus single-ended sensing topologies. |
| Secure ID ROM | 64-bit factory-programmable serialization (48-bit serial + 8-bit family code + 8-bit CRC) - enables pack authentication and anti-counterfeiting in OEM supply chains. |
Applications
| Smartphone Battery Management | PDA Power Monitoring |
|---|---|
|
Use Scenario: Real-time state-of-charge tracking during mixed-use patterns (voice, data, display). IC Role / Device Role / Timing Role: Coulomb counter and temperature monitor interfacing with baseband processor via SDQ bus. Use Value: Enables precise battery remaining-time estimation and low-battery warnings without external sensors or crystals. |
Use Scenario: Accurate runtime prediction during extended offline document editing and Wi-Fi synchronization. IC Role / Device Role / Timing Role: Gas-gauge engine providing charge/discharge accumulation and self-discharge modeling to host OS power manager. Use Value: Reduces unexpected shutdowns by correlating capacity loss with temperature history stored in flash memory. |
| Wearable Device Battery Pack | Medical Portable Monitor |
|
Use Scenario: Ultra-low-power operation in fitness tracker with intermittent BLE transmission and motion-sensing duty cycles. IC Role / Device Role / Timing Role: Sleep-mode supervisor and current integrator activated only during active sensing periods. Use Value: Achieves 1.5 µA sleep current and automatic wake-on-SDQ, extending shelf life and operational runtime between charges. |
Use Scenario: Reliable battery health reporting in FDA-cleared handheld diagnostic equipment requiring traceable calibration data. IC Role / Device Role / Timing Role: Secure parameter storage and tamper-resistant ID ROM for regulatory audit trails. Use Value: Stores calibrated gas-gauge coefficients and manufacturing date in 224-byte flash with CRC integrity checking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ2019PWR | Lacks internal temperature sensor; uses external thermistor; 256-byte RAM but only 128-byte flash; no secure ID ROM. | Requires additional components for thermal monitoring; less suitable for space-constrained or authenticated packs. | Select BQ2019PWR only if cost reduction outweighs need for integrated temp sensing and secure identification. |
| BQ2025PWR | Enhanced version with extended voltage range (2.2 V min), improved VFC gain stability (±1.5% vs ±4%), and added EEPROM lock bits. | Supports deeper discharge cutoff and higher accuracy over wider temperature range; backward-compatible SDQ protocol. | Choose BQ2025PWR for next-gen designs requiring tighter SoC tolerance and longer shelf-life validation. |
Compared with BQ2023PWR, BQ2019PWR reduces integration at the cost of external thermal components and security features, while BQ2025PWR extends accuracy and operating range without changing footprint or interface - making it a drop-in upgrade for enhanced reliability-critical applications.
Availability
BQ2023PWR is available at Aetrix Electronics and suitable for smartphone battery packs, medical portable monitors, wearable device power systems, and industrial handheld terminals requiring stable component supply and long-lifecycle support.
Supply support for BQ2023PWR 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 leadership in battery management ICs.
The BQ2023PWR belongs to TI's bq™ family of battery fuel gauges, engineered specifically for high-accuracy, low-power, single-cell Li-ion/Li-polymer applications in portable consumer electronics.
FAQ
What is the minimum operating voltage for BQ2023PWR, and does it support flash programming at that voltage?
The BQ2023PWR operates down to 2.4 V, enabling use across the full discharge curve of single-cell Li-ion batteries. However, flash write/erase requires a minimum VCC of 2.8 V per the recommended operating conditions. Below 2.8 V, the device remains functional for real-time coulomb counting and temperature reporting, but nonvolatile memory updates are disabled to ensure data integrity.
How does the BQ2023PWR handle current-sense offset drift over temperature and time?
The BQ2023PWR performs automatic hourly self-calibration and continuous offset compensation of its voltage-to-frequency converter (VFC). Measured offset stays within –15.8 µV to +11.4 µV across –20°C to 70°C and 2.4–4.2 V supply, eliminating manual calibration routines and maintaining SoC accuracy over product lifetime without host intervention.
Can multiple BQ2023PWR devices share the same SDQ bus, and how is device addressing managed?
Yes, multiple BQ2023PWR devices can coexist on a single SDQ bus using Dallas 1-Wire®-compatible ROM commands. Each unit has a unique 64-bit ID ROM (including 48-bit serial number and 8-bit family code), allowing the host to issue Match ROM or Search ROM commands to selectively communicate with individual devices in multi-pack configurations.
What happens to BQ2023PWR registers and RAM during a brownout condition below power-on reset threshold?
When VCC drops below the POR threshold (2.0–2.34 V), the BQ2023PWR enters backup mode using the RBI pin. If an external capacitor or auxiliary supply is connected to RBI, the 32-byte RAM and critical registers retain their state - preserving accumulated charge/discharge counts and temperature history until VCC recovers and normal operation resumes.
Is the internal temperature sensor in BQ2023PWR calibrated, and what is its accuracy specification?
The BQ2023PWR's internal die temperature sensor is factory-trimmed and reports values in °K with 0.25°K resolution. Its accuracy is specified as ±4°K over –20°C to 70°C ambient, sufficient for battery thermal profiling and self-discharge compensation without requiring external calibration or lookup tables in the host firmware.
BQ2023PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Fault Protection:
- -
- Interface:
- SDQ
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
BQ2023PWR FAQ
1.How can I place an order for BQ2023PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2023PWR 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 BQ2023PWR reliable?
The price and inventory of BQ2023PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2023PWR is usually 5 days.
3.What payment methods are accepted for BQ2023PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2023PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2023PWR?
BQ2023PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2023PWR 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 BQ2023PWR?
For technical support, including BQ2023PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2023PWR requirements.
6.How does Aetrix verify that BQ2023PWR is sourced from the original manufacturer or authorized distributors?
All BQ2023PWR 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 BQ2023PWR meets industry standards.
7.What is the process for return or replacement of BQ2023PWR?
All BQ2023PWR units undergo pre-shipment inspection (PSI). If there is an issue with BQ2023PWR, 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 BQ2023PWR part is unused and in its original packaging.
Return procedure for BQ2023PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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