My Inquiry
My Account
Texas Instruments BQ2023PWG4
- Part No.:
- BQ2023PWG4
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ2023PWG4.pdf
- Description:
- IC BATT MON LI-ION 1CELL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,711
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ2023PWG4 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 with 0.25°K resolution, and communicates over a single-wire SDQ interface. It delivers state-of-charge information to host controllers in portable electronics such as cellular phones and PDAs.
For engineers reviewing the BQ2023PWG4 datasheet, BQ2023PWG4 pinout, BQ2023PWG4 application, or BQ2023PWG4 equivalent, key selection considerations include its 3.05 µVh charge/discharge resolution, 2.4 V minimum supply operation, automatic VFC offset calibration, 224-byte flash + 32-byte RAM memory architecture, and sleep-mode current of 1.5 µA - all critical for low-power, precision gas gauging in space-constrained battery packs.
Technical Context
The BQ2023PWG4 implements a voltage-to-frequency converter (VFC) architecture to digitize 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 on a Dallas Semiconductor–compatible 1-wire SDQ bus, supporting multi-device nodes with CRC-protected command framing. The device uses register-based control via ROM and memory function commands, with dedicated counters (DCR/CCR/SCR) and timers (DTC/CTC) mapped across a 271-byte address space spanning flash, RAM, and secure ID ROM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.4 V to 5.0 V - supports operation down to single-cell Li-ion minimum voltage without brownout |
| Current Sensing Resolution | 3.05 µVh/LSB - enables sub-milliamp-hour accuracy in coulomb counting over extended runtime |
| VFC Input Range | ±100 mV differential - accommodates typical 0.02 Ω sense resistors at ±5 A full-scale current |
| Temperature Sensing | 0.25°K resolution, ±4°K accuracy - replaces external thermistors in battery pack designs |
| Memory Resources | 224 bytes flash (7 × 32-byte pages), 32 bytes RAM, 8-byte secure ID ROM - stores calibrated gas-gauge parameters and pack identity |
| Quiescent Current | 40 µA operating / 1.5 µA sleep - extends shelf life and minimizes self-discharge impact during storage |
| Interface Protocol | SDQ single-wire serial (1-wire compatible) with CRC-protected read/write - reduces PCB routing complexity and connector pin count |
Pinout & Package
Package: 8-pin TSSOP (PW), 3.0 mm × 4.4 mm, 0.65 mm pitch, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RBI | Register Backup I/O | Provides backup power path to retain RAM/register contents when VCC drops below POR threshold (2.34 V) |
| VCC | Supply Input | Primary power input (2.4–5.0 V); powers analog/digital blocks and enables flash write/erase operations above 2.8 V |
| VSS | Ground Reference | Analog/digital common return; serves as reference for SRP/SRN differential sensing and internal ADC |
| SDQ | Single-Wire Data I/O | Bidirectional 1-wire interface with pullup; handles all command, data, and CRC exchange with host controller |
| STAT | Open-Drain Status Output | Asserts low to signal fault or status events; disabled in sleep mode when PDET is low |
| SRP | Current Sense Positive Input | Connects to battery negative terminal side of sense resistor; polarity determines charge/discharge direction |
| SRN | Current Sense Negative Input | Connects to pack negative contact side of sense resistor; differential voltage (SRP–SRN) drives VFC |
| PDET | Pack Removal Detection Input | Active-low input that forces immediate sleep mode and disables STAT output upon battery pack disconnection |
Key Features
| Feature | Design Value |
|---|---|
| Differential Current Sensing | Eliminates common-mode noise and ground loop errors in high-side or low-side sense configurations |
| Auto-Offset Calibration | Performs hourly VFC offset compensation without host intervention, maintaining long-term measurement stability |
| Integrated Temperature Sensor | Enables real-time thermal correction of capacity estimation without adding external components or layout area |
| Low-Power Sleep Mode | Reduces system standby current to 1.5 µA while preserving temperature and self-discharge registers |
| Secure ID ROM | 64-bit factory-programmable serialization with CRC ensures pack authenticity and prevents counterfeit substitution |
Applications
| Smartphone Battery Management | PDA Power Monitoring |
|---|---|
Use Scenario: Real-time state-of-charge tracking during mixed-use cycles (screen-on, GPS, voice call). IC Role / Device Role / Timing Role: Coulomb-counting gas gauge IC providing host MCU with calibrated charge/discharge integrals and temperature-corrected capacity estimates. Use Value: Enables accurate battery percentage display and low-battery warnings within ±3% SOC error over 300+ charge cycles. | Use Scenario: Long-duration field operation where battery self-discharge must be modeled during weeks of idle storage. IC Role / Device Role / Timing Role: Self-discharge counter (SCR) with temperature-dependent rate scaling (doubles per 10°C above 25°C) feeds host algorithm for shelf-life prediction. Use Value: Reduces need for periodic reconditioning by predicting usable capacity after 90-day storage at 35°C ambient. |
| Wearable Device Fuel Gauging | Medical Portable Monitor Pack |
Use Scenario: Compact wearable with tight board space and strict power budget requiring minimal external components. IC Role / Device Role / Timing Role: Single-chip solution integrating current sensing, temperature measurement, nonvolatile memory, and 1-wire interface - no crystal, no thermistor, no external ADC. Use Value: Cuts BOM cost by $0.32 and saves 3.5 mm² PCB area versus discrete sensing + microcontroller + EEPROM approach. | Use Scenario: Life-critical medical device requiring traceable battery identity and tamper-resistant parameter storage. IC Role / Device Role / Timing Role: Secure ID ROM and flash memory store calibrated discharge profiles, firmware version, and manufacturing date with CRC integrity checking. Use Value: Supports FDA-required battery history logging and enables field firmware updates tied to specific pack revisions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ2013H | Lacks internal temperature sensor; requires external thermistor; no secure ID ROM; 16-byte RAM only | Suitable for cost-sensitive, non-medical applications where thermal modeling is handled externally | Select BQ2013H only if temperature sensing is implemented separately and security/traceability is not required |
| BQ2019 | Higher VFC gain tolerance (±6% vs ±4%); no auto-offset calibration; 128-byte flash; no PDET input | Targeted at legacy systems with fixed calibration tables and simpler pack detection schemes | Choose BQ2019 only when migrating from existing BQ2019 designs and flash capacity >128 bytes is unnecessary |
Compared with BQ2023PWG4, BQ2013H omits integrated thermal sensing and secure identity, increasing component count and reducing anti-counterfeit capability; BQ2019 lacks autonomous calibration and pack-removal detection, demanding more host software overhead and compromising safety-critical disconnect response.
Availability
BQ2023PWG4 is available at Aetrix Electronics and suitable for smartphone battery management, PDA power monitoring, wearable fuel gauging, medical portable monitor packs, and industrial handheld terminals requiring stable component supply and long-lifecycle support.
Supply support for BQ2023PWG4 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 BQ2023PWG4 belongs to TI's bq™ family of battery fuel gauges, engineered specifically for high-accuracy, low-power, single-wire integration in compact rechargeable battery packs for portable consumer and medical electronics.
FAQ
What is the minimum operating voltage for the BQ2023PWG4?
The BQ2023PWG4 operates down to 2.4 V, enabling reliable functionality across the full discharge curve of single-cell Li-ion and Li-polymer batteries. Below 2.4 V, the device enters sleep mode unless flash programming is active - which requires ≥2.8 V. This low-voltage capability ensures continuous state-of-charge reporting even under deep discharge conditions before protection circuitry triggers.
How does the BQ2023PWG4 achieve high-accuracy current measurement without external calibration?
The BQ2023PWG4 achieves high-accuracy current measurement through an internal voltage-to-frequency converter (VFC) with automatic hourly offset calibration and continuous compensation. Its VFC resolves signals down to 3.05 µVh, and the auto-compensation corrects for drift caused by temperature and aging - eliminating the need for manual calibration or external trimming components in production.
Can the BQ2023PWG4 operate without an external crystal oscillator?
Yes, the BQ2023PWG4 includes a high-accuracy internal timebase that eliminates the need for an external crystal oscillator. This integrated timing source supports all coulomb counting, timer functions (DTC/CTC), and SDQ communication timing - reducing bill-of-materials cost, PCB area, and design complexity while maintaining ±4% timer accuracy over –20°C to 70°C.
What is the role of the PDET pin on the BQ2023PWG4?
The PDET pin on the BQ2023PWG4 is an active-low pack removal detection input. When pulled low, it immediately places the BQ2023PWG4 into sleep mode and disables the open-drain STAT output - preventing false status signals and minimizing current draw when the battery pack is disconnected from the host system. This feature enhances safety and power efficiency in hot-swap battery applications.
Does the BQ2023PWG4 support multiple devices on the same SDQ bus?
Yes, the BQ2023PWG4 supports multiple devices on the same SDQ bus using Dallas Semiconductor–compatible 1-wire protocol. Each device has a unique 64-bit ID ROM, enabling individual addressing via Match ROM or Search ROM commands. This allows daisy-chained or parallel topologies in multi-cell or multi-pack systems without additional hardware arbitration.
BQ2023PWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
BQ2023PWG4 FAQ
1.How can I place an order for BQ2023PWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2023PWG4 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 BQ2023PWG4 reliable?
The price and inventory of BQ2023PWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2023PWG4 is usually 5 days.
3.What payment methods are accepted for BQ2023PWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2023PWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2023PWG4?
BQ2023PWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2023PWG4 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 BQ2023PWG4?
For technical support, including BQ2023PWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2023PWG4 requirements.
6.How does Aetrix verify that BQ2023PWG4 is sourced from the original manufacturer or authorized distributors?
All BQ2023PWG4 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 BQ2023PWG4 meets industry standards.
7.What is the process for return or replacement of BQ2023PWG4?
All BQ2023PWG4 units undergo pre-shipment inspection (PSI). If there is an issue with BQ2023PWG4, 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 BQ2023PWG4 part is unused and in its original packaging.
Return procedure for BQ2023PWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ2023PWG4 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…
