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Texas Instruments BQ26200PWRG4
- Part No.:
- BQ26200PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ26200PWRG4.pdf
- Description:
- IC BAT MON MULT-CHEM 1-4C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,089
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Product details
Overview
BQ26200PWRG4 from Texas Instruments is a multifunction battery monitoring IC designed for integration into rechargeable Li-ion/Li-polymer and Ni-based battery packs. It provides high-accuracy coulometric charge/discharge current integration (±0.5% INL), differential current sensing (±100 mV input range), internal temperature measurement (±3 K accuracy), 32 bytes of flash-shadowed RAM, and 96 bytes of user-accessible non-volatile memory - enabling precise state-of-charge estimation in portable electronics such as smartphones and PDAs.
For engineers reviewing the BQ26200PWRG4 datasheet, BQ26200PWRG4 pinout, BQ26200PWRG4 application, or BQ26200PWRG4 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in single-cell Li-ion systems, and confirmed alternative options with documented functional differences.
Technical Context
The BQ26200PWRG4 implements a voltage-to-frequency converter (VFC) architecture with auto-compensated offset (−17.7 to +12.5 µV), enabling accurate integration of SRP–SRN differential voltage without host calibration. Its internal temperature-compensated oscillator eliminates external crystal dependency, while the REG output drives an external N-JFET for regulated supply generation at 4.75 V nominal.
Communication occurs via a single-wire HDQ interface (5 kbit/s max), supporting register-mapped read/write, flash programming, RAM-to-flash transfers, and sleep-mode wake-on-HDQ transition. The device operates across 2.8 V to 5.5 V supply and −20°C to 70°C ambient, with sleep current <2 µA and operating current <95 µA at 4.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.8 V to 5.5 V - supports direct operation from single Li-ion or 3–4 Ni-cell stacks without external regulator |
| Current Sense Input Range | ±100 mV differential - enables high-resolution charge/discharge tracking using low-value sense resistors (e.g., 0.02 Ω) |
| Charge/Discharge Integration Accuracy | ±0.5% INL - ensures reliable coulomb counting for SOC estimation over battery lifetime |
| Internal Temperature Accuracy | ±3 K - eliminates need for external thermistor while maintaining thermal compensation for self-discharge modeling |
| HDQ Interface Speed | 5 kbit/s max - compatible with low-cost microcontroller GPIOs using pulse-width capture, no UART required |
| Sleep Current | <2 µA - extends pack shelf life during storage by minimizing parasitic drain on battery |
| Non-Volatile Memory | 96 bytes (64 flash + 32 flash-shadowed RAM + 8 ID ROM) - retains battery ID, chemistry, warranty, and usage history through deep discharge |
Pinout & Package
Package: 8-pin TSSOP (PW), 3.0 mm × 4.4 mm, 0.65 mm pitch, moisture sensitivity level 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REG | Regulator output | Drives external N-JFET to generate regulated 4.75 V supply; remains active in sleep mode |
| VCC | Supply voltage input | Primary power input (2.8–5.5 V); powers all internal circuitry including VFC and HDQ engine |
| VSS | Ground reference | Analog/digital common ground; serves as reference for SRP/SRN differential measurement |
| HDQ | Single-wire bidirectional I/O | Carries command/data frames (break + command byte + data byte) at ≤5 kbit/s; requires external pullup |
| STAT | Open-drain status output | Configurable general-purpose output (e.g., battery OK/low-charge indicator); sinks up to 5 mA |
| SRP | Current sense positive input | Connects to sense resistor high side and battery negative terminal; detects discharge when V(SRP) < V(SRN) |
| SRN | Current sense negative input | Connects to sense resistor low side and pack negative terminal; completes differential sensing path |
| OSC | Oscillator timebase adjust | Current source pin; sets internal timer accuracy via external resistor (100 kΩ ±0.1% yields ±3% error) |
Key Features
| Feature | Design Value |
|---|---|
| Differential current sensing | Enables accurate coulomb counting with immunity to common-mode noise and PCB trace resistance |
| Auto-compensating VFC offset | Eliminates need for host-initiated calibration cycles; maintains <12.5 µV offset drift over temperature and time |
| Flash-shadowed RAM | Ensures critical runtime data (e.g., CCR/DCR values) survives power loss via automatic RAM↔flash sync on command |
| Temperature-dependent self-discharge modeling | SCR increments at 1 count/hour @25°C, doubling every +10°C - enables accurate capacity prediction during storage |
| Single-wire HDQ interface | Reduces BOM cost and PCB routing complexity vs. I²C/SPI; supports firmware updates and diagnostics over one trace |
Applications
| Smartphone Battery Pack Monitoring | PDA Power Management System |
|---|---|
Use Scenario: Real-time state-of-charge tracking and end-of-charge termination in compact single-cell Li-ion battery packs. IC Role / Device Role / Timing Role: Coulomb counter and temperature-aware gas gauge IC; provides host MCU with calibrated DCR/CCR/SCR registers via HDQ. Use Value: Enables accurate remaining runtime estimation and prevents overcharge/overdischarge using integrated 3.05 µV/LSB resolution and auto-offset correction. |
Use Scenario: Long-term battery health logging and self-discharge compensation during intermittent PDA usage. IC Role / Device Role / Timing Role: Non-volatile battery parameter manager; stores chemistry ID, manufacturing date, and cycle history in flash-shadowed RAM. Use Value: Maintains battery identity and usage metrics across deep discharge events using 96-byte embedded memory with 5-year data retention. |
| Portable Medical Device Power Gauge | Wearable Electronics Fuel Gauge |
Use Scenario: Low-power fuel gauging in Class II medical devices requiring stable operation across −20°C to 70°C. IC Role / Device Role / Timing Role: Ultra-low-power battery monitor; enters sleep mode (<2 µA) between host queries while sustaining SCR updates. Use Value: Extends device shelf life and field service intervals by minimizing quiescent current without sacrificing temperature-compensated accuracy. |
Use Scenario: Space-constrained wearable battery management where PCB area and component count are critical. IC Role / Device Role / Timing Role: Integrated timing and sensing subsystem; replaces external crystal, thermistor, and discrete ADC with single 8-pin TSSOP IC. Use Value: Reduces bill-of-materials by 4 components (crystal, thermistor, op-amp, ADC) while maintaining ±3 K thermal accuracy and ±0.5% INL. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27200DRVR | Integrated 12-bit ADC, higher current sense resolution (0.5 mV LSB), but requires external thermistor and crystal; no REG output | Designed for higher-precision gauging in cost-insensitive industrial packs; lacks self-contained regulation and oscillator | Select when absolute current measurement accuracy >0.1% is required and external components are acceptable |
| BQ26100PWR | Legacy predecessor with identical pinout and HDQ interface, but only 16 bytes RAM, no flash shadowing, and no internal temperature sensor | Targeted at basic NiMH packs without Li-ion support or long-term data retention needs | Choose only for legacy design refresh where memory and thermal features are not needed |
Compared with BQ26200PWRG4, BQ27200DRVR offers superior current resolution but increases system BOM and layout complexity, while BQ26100PWR reduces functionality and data retention capability - making BQ26200PWRG4 the optimal balance of integration, accuracy, and low-power operation for modern portable Li-ion designs.
Availability
BQ26200PWRG4 is available at Aetrix Electronics and suitable for smartphone battery management, PDA power systems, portable medical device fuel gauging, wearable electronics energy monitoring, and industrial handheld instrument battery packs requiring stable component supply and long-term lifecycle support.
Supply support for BQ26200PWRG4 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 expertise in battery management solutions.
The BQ26200PWRG4 belongs to TI's battery fuel gauge IC product line, engineered specifically for high-accuracy, low-power coulomb counting and SOC estimation in space-constrained portable battery packs.
FAQ
What is the primary function of the BQ26200PWRG4 in a battery pack?
The BQ26200PWRG4 serves as a standalone coulomb-counting fuel gauge IC that measures charge/discharge current via differential sensing on SRP/SRN, integrates that current over time using an auto-calibrating VFC, and reports accumulated counts (DCR/CCR/SCR) and temperature to a host controller via HDQ. It does not perform charging control itself but enables precise state-of-charge calculation in systems like smartphones and PDAs.
Does the BQ26200PWRG4 require an external crystal oscillator?
No, the BQ26200PWRG4 does not require an external crystal oscillator. It uses an internal temperature-compensated precision oscillator whose frequency is set by an external resistor on the OSC pin. A 100 kΩ ±0.1% resistor achieves ±3% timer accuracy, eliminating crystal cost, footprint, and layout sensitivity.
How does the BQ26200PWRG4 handle current sense offset drift?
The BQ26200PWRG4 performs continuous automatic offset compensation of the V(SRP)–V(SRN) signal, achieving −17.7 µV to +12.5 µV offset over temperature and supply voltage. This eliminates the need for host-initiated calibration routines or manual trimming, ensuring stable coulomb counting accuracy throughout battery life and environmental conditions.
What memory resources are available on the BQ26200PWRG4 for storing battery data?
The BQ26200PWRG4 provides 96 bytes of non-volatile memory: 8 bytes of factory-programmed ID ROM, 32 bytes of flash-shadowed RAM (retained across power loss), and 64 bytes of general-purpose flash. This allows storage of unique serial numbers, battery chemistry parameters, manufacturing dates, warranty information, and usage history - all accessible via HDQ commands.
Can the BQ26200PWRG4 operate directly from a single Li-ion cell?
Yes, the BQ26200PWRG4 operates over a supply range of 2.8 V to 5.5 V, making it fully compatible with direct connection to a single Li-ion or Li-polymer cell (nominal 3.7 V, discharged to ~2.8 V). Its <95 µA operating current and <2 µA sleep current ensure minimal impact on battery runtime and shelf life.
BQ26200PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1 ~ 4
- Fault Protection:
- -
- Interface:
- HDQ
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
BQ26200PWRG4 FAQ
1.How can I place an order for BQ26200PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ26200PWRG4 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 BQ26200PWRG4 reliable?
The price and inventory of BQ26200PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ26200PWRG4 is usually 5 days.
3.What payment methods are accepted for BQ26200PWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ26200PWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ26200PWRG4?
BQ26200PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ26200PWRG4 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 BQ26200PWRG4?
For technical support, including BQ26200PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ26200PWRG4 requirements.
6.How does Aetrix verify that BQ26200PWRG4 is sourced from the original manufacturer or authorized distributors?
All BQ26200PWRG4 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 BQ26200PWRG4 meets industry standards.
7.What is the process for return or replacement of BQ26200PWRG4?
All BQ26200PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with BQ26200PWRG4, 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 BQ26200PWRG4 part is unused and in its original packaging.
Return procedure for BQ26200PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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