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Texas Instruments BQ2023PW
- Part No.:
- BQ2023PW
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ2023PW.pdf
- Description:
- IC BATT MON LI-ION 1CELL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,540
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Product details
Overview
BQ2023PW 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 (±100 mV input range), resolves charge/discharge energy down to 3.05 µV·h, and integrates internal temperature sensing (0.25°K resolution) - enabling precise state-of-charge estimation in portable electronics such as smartphones and PDAs.
For engineers reviewing the BQ2023PW datasheet, BQ2023PW pinout, BQ2023PW application, or BQ2023PW equivalent, key selection considerations include its SDQ single-wire interface compatibility with Dallas 1-Wire™, automatic VFC offset calibration, 224-byte flash + 32-byte RAM memory architecture, sleep mode current of 1.5 µA, and TSSOP-8 package suitability for space-constrained battery-pack integration.
Technical Context
The BQ2023PW implements a voltage-to-frequency converter (VFC) architecture to digitize differential sense voltage (SRP–SRN) into charge/discharge counts at 3.05 µV·h/LSB resolution. Its internal timebase eliminates external crystal requirements, and continuous auto-calibration compensates VFC offset drift hourly.
Communication occurs over a bidirectional SDQ pin using Dallas 1-Wire™–compatible protocol with CRC-8 error checking. The device supports register access, flash programming, and secure ID ROM readout via hierarchical ROM and memory function commands - all operating under 2.4 V minimum supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.4 V to 5.0 V - enables operation directly from single-cell Li-ion battery without LDO, supporting deep-discharge recovery |
| Current Sense Input Range | ±100 mV differential - accommodates low-value sense resistors (e.g., 0.02 Ω) while maintaining 3.05 µV·h resolution |
| VFC Resolution | 3.05 µV·h per LSB - translates to ±0.062% full-scale accuracy for 100 mV input over 1 hour |
| Operating Temperature | –20°C to +70°C - qualified for consumer portable equipment ambient conditions |
| Supply Current (Active) | 32–40 µA at 4.2 V - minimizes parasitic drain during host polling intervals |
| Sleep Current | 1.0–1.5 µA - extends battery shelf life when pack is disconnected or idle |
| Internal Temp Sensor | 0.25°K resolution, ±4°K accuracy - replaces external thermistor, reducing BOM count and layout area |
Pinout & Package
Package: 8-pin TSSOP (PW), 3.0 mm × 4.4 mm, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PDET | Pack removal detection input | Low-level assertion forces immediate sleep mode and disables STAT output - prevents false status reporting after pack disconnect |
| RBI | Register backup I/O | Provides VCC backup path to retain RAM/register contents during brownout (<2.0 V POR threshold) |
| SDQ | Single-wire serial data I/O | Dallas 1-Wire™–compatible bidirectional interface with built-in CRC-8 generation - supports multi-device bus sharing |
| SRN | Current sense negative input | Connects to battery-pack ground side of sense resistor - completes differential measurement path with SRP |
| SRP | Current sense positive input | Connects to battery negative terminal side of sense resistor - polarity determines charge (SRP > SRN) vs discharge (SRP < SRN) |
| STAT | Open-drain status output | Drives external LED or host interrupt; disabled during sleep - provides real-time system-ready indication |
| VCC | Power supply input | Accepts 2.4–5.0 V; powers internal VFC, logic, and temperature sensor - no external regulator required |
| VSS | Ground reference | Common return for VFC, SDQ pullup, and internal circuitry - must be low-impedance connection to pack ground |
Key Features
| Feature | Design Value |
|---|---|
| Differential current sensing | Rejects common-mode noise up to 100 mV, enabling accurate measurement in noisy battery-pack environments |
| Auto-offset calibration | Performs hourly VFC offset compensation - maintains <±15.8 µV offset error across temperature and supply variations |
| Integrated temperature sensor | Eliminates need for external thermistor and associated routing - reduces component count and PCB area by ~3 mm² |
| SDQ 1-Wire™ interface | Enables daisy-chaining multiple BQ2023PW units on one microcontroller GPIO - simplifies multi-cell or multi-battery system design |
| Nonvolatile memory | 224 bytes flash + 8-byte secure ID ROM - stores calibrated gas-gauge parameters and unique pack identification without external EEPROM |
Applications
| Smartphone Battery Management | PDA Power Monitoring |
|---|---|
|
Use Scenario: Real-time state-of-charge tracking during dynamic usage (calls, video playback, standby). IC Role / Device Role / Timing Role: Coulomb-counting gas gauge IC interfacing with application processor via SDQ bus. Use Value: Delivers ±1% SoC accuracy over full discharge cycle using integrated VFC and auto-calibration - improves user battery-life predictability. |
Use Scenario: Accurate runtime estimation and low-battery warning in handheld computing devices. IC Role / Device Role / Timing Role: Primary battery monitor providing temperature-compensated discharge counters to host OS power manager. Use Value: Internal 0.25°K temperature resolution enables self-discharge modeling within ±4°K - extends usable runtime by optimizing charge termination. |
| Wearable Device Fuel Gauging | Medical Portable Instrument Power |
|
Use Scenario: Compact wearable with tight space constraints requiring minimal external components. IC Role / Device Role / Timing Role: Standalone fuel gauge IC embedded in battery pack, communicating via single-wire SDQ. Use Value: TSSOP-8 footprint and 1.5 µA sleep current reduce pack size and leakage - enables >6-month shelf life without maintenance charging. |
Use Scenario: Life-critical portable medical device needing reliable battery status under variable load and temperature. IC Role / Device Role / Timing Role: Safety-relevant battery monitor feeding validated SoC data to system controller for alarm and shutdown logic. Use Value: Secure ID ROM and flash memory integrity (CRC-8 protected reads/writes) ensure traceable, tamper-resistant battery parameter storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ2019PW | Lacks internal temperature sensor; requires external thermistor; 16-byte RAM only; no flash memory | Lower-cost implementation where temperature compensation is handled externally or omitted | Select BQ2019PW only if flash-based parameter storage and integrated thermal sensing are unnecessary |
| BQ2025PW | Includes enhanced flash write endurance (100k cycles vs 10k); adds programmable digital output port with configurable drive strength | Supports advanced battery authentication and firmware-updatable gas-gauge algorithms | Choose BQ2025PW when field-programmable calibration or secure pack identification is required |
Compared with BQ2023PW, BQ2019PW reduces functionality to basic coulomb counting without thermal or nonvolatile storage capabilities, while BQ2025PW extends flash reliability and I/O flexibility - making BQ2023PW the optimal balance of integration, accuracy, and cost for mainstream portable Li-ion packs.
Availability
BQ2023PW is available at Aetrix Electronics and suitable for smartphone battery management, PDA power monitoring, and wearable device fuel gauging requiring stable component supply throughout product lifecycle.
Supply support for BQ2023PW 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 for industrial, automotive, and consumer applications.
The BQ2023PW belongs to TI's battery management IC portfolio, engineered specifically to enable accurate, low-power, single-wire–enabled fuel gauging in compact Li-ion battery packs for portable electronics.
FAQ
What is the primary function of the BQ2023PW in a battery pack?
The BQ2023PW serves as a standalone coulomb-counting fuel gauge IC that measures battery charge/discharge current via differential sense inputs (SRP/SRN), integrates accumulated charge using an internal voltage-to-frequency converter, and reports state-of-charge to a host controller via the SDQ single-wire interface. Its integrated temperature sensor and flash memory eliminate external components required for accurate, long-term battery monitoring in the BQ2023PW.
Does the BQ2023PW require an external crystal oscillator?
No, the BQ2023PW features a high-accuracy internal timebase that eliminates the need for an external crystal oscillator. This reduces bill-of-materials cost and PCB layout complexity while maintaining timing stability sufficient for coulomb counting and sleep-mode wake-up scheduling in the BQ2023PW.
How does the BQ2023PW handle battery pack removal detection?
The BQ2023PW uses the PDET pin to detect pack removal: when PDET is driven low, the device immediately enters sleep mode and disables the open-drain STAT output. This prevents erroneous status signaling and preserves battery charge during disconnection - a critical behavior confirmed in the BQ2023PW functional description and absolute maximum ratings table.
What memory resources are available on the BQ2023PW?
The BQ2023PW integrates 224 bytes of flash memory (organized in seven 32-byte pages), 32 bytes of general-purpose RAM, and 8 bytes of secure ID ROM. Flash retains gas-gauge calibration data and pack identification across deep discharge; RAM holds volatile counters; ID ROM stores factory-programmed serialization - all accessible via the SDQ interface in the BQ2023PW.
Can the BQ2023PW operate below 2.4 V?
No, the BQ2023PW has a minimum operating supply voltage of 2.4 V. Below this threshold, the device enters power-on reset (POR) state and ceases functional operation until VCC rises above 2.34 V (typical POR threshold). However, the RBI pin allows RAM retention during brief brownouts below 2.4 V - a capability explicitly defined in the BQ2023PW recommended operating conditions.
BQ2023PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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
BQ2023PW FAQ
1.How can I place an order for BQ2023PW through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2023PW 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 BQ2023PW reliable?
The price and inventory of BQ2023PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2023PW is usually 5 days.
3.What payment methods are accepted for BQ2023PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2023PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2023PW?
BQ2023PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2023PW 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 BQ2023PW?
For technical support, including BQ2023PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2023PW requirements.
6.How does Aetrix verify that BQ2023PW is sourced from the original manufacturer or authorized distributors?
All BQ2023PW 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 BQ2023PW meets industry standards.
7.What is the process for return or replacement of BQ2023PW?
All BQ2023PW units undergo pre-shipment inspection (PSI). If there is an issue with BQ2023PW, 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 BQ2023PW part is unused and in its original packaging.
Return procedure for BQ2023PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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