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Texas Instruments BQ26200PW
- Part No.:
- BQ26200PW
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ26200PW.pdf
- Description:
- IC BAT MON MULT-CHEM 1-4C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,091
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Product details
Overview
BQ26200PW from Texas Instruments is a multifunction battery monitoring IC designed for integration into rechargeable Li-ion/Li-polymer and Ni-based battery packs. It performs high-accuracy coulometric charge/discharge current integration (3.05 µV/LSB), provides on-die temperature sensing (±3 K accuracy), and delivers state-of-charge data to host controllers in portable electronics such as smartphones and PDAs.
For engineers reviewing the BQ26200PW datasheet, BQ26200PW pinout, BQ26200PW application, or BQ26200PW equivalent, this page details its single-wire HDQ interface, 8-pin TSSOP package, integrated VFC with auto-offset compensation, 32-byte flash-shadowed RAM, and sleep-mode current of <2 µA - all critical for low-power, space-constrained battery management designs.
Technical Context
The BQ26200PW implements a voltage-to-frequency converter (VFC) architecture to digitize current-sense voltage (±100 mV range) with 3.05 µV/LSB resolution, enabling precise coulomb counting. Its internal temperature-compensated oscillator eliminates external crystals, and self-discharge counting scales dynamically with die temperature (doubling every 10°C above 25°C).
It operates across 2.8 V–5.5 V supply, supports direct single-cell Li-ion or multi-cell Ni-chemistry battery input, and integrates REG output (4.75 V nominal) to drive external N-JFETs for regulated supply in higher-voltage pack configurations. All register access and control occur via asynchronous HDQ serial protocol at ≤5 kbit/s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.8 V to 5.5 V - enables direct operation from single Li-ion or 3–4 Ni-cell stacks without external LDO |
| Operating Current (Active) | <95 µA at 4.3 V - minimizes parasitic drain during real-time monitoring |
| Sleep Current | <2 µA - sustains self-discharge tracking over months of storage with negligible battery loss |
| Current Sense Range | ±100 mV differential - supports 0.02 Ω sense resistor for ±5 A full-scale measurement |
| Charge/Discharge Resolution | 3.05 µV/LSB - yields ~1.5 mAh LSB at 0.02 Ω, enabling sub-1% SoC error over typical cycles |
| Temperature Accuracy | ±3 K from −20°C to 70°C - enables reliable thermal derating of self-discharge models |
| Memory Resources | 32 B RAM + 96 B Flash (64 B user + 32 B shadow) + 8 B ID ROM - stores calibrated chemistry parameters, serial ID, and runtime counters non-volatily |
Pinout & Package
Package: 8-pin TSSOP (PW), 3.0 mm × 4.4 mm, 0.65 mm pitch, exposed pad optional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HDQ | Single-wire bidirectional I/O | Host communication interface using HDQ protocol; requires external pullup; supports ≤5 kbit/s asynchronous return-to-one framing |
| OSC | Oscillator current source output | Drives external resistor (e.g., 100 kΩ ±0.1%) to set internal timebase; accuracy ±3% over temp |
| REG | Regulator amplifier output | Drives external N-JFET to generate regulated 4.75 V supply; remains active in sleep mode unless disabled via DISREG bit |
| SRP / SRN | Differential current sense inputs | Voltage across external sense resistor; polarity determines charge (SRP > SRN) vs. discharge (SRP < SRN); 10 MΩ input impedance |
| STAT | Open-drain status output | Configurable general-purpose output; driven by host via HDQ; sink capability 5 mA |
| VCC | Power supply input | Primary power rail; accepts 2.8–5.5 V; powers all analog/digital blocks including VFC and timers |
| VSS | Ground reference | Analog/digital common ground; must be low-impedance connection to sense resistor negative terminal |
Key Features
| Feature | Design Value |
|---|---|
| Auto-calibrating VFC | Continuous offset compensation eliminates need for host-initiated calibration; maintains <12.5 µV offset over supply/temp range |
| Integrated temperature sensor | Die temperature reported in Kelvin (TMPH/TMPL registers); replaces external thermistor and associated ADC routing |
| Flash-shadowed RAM | 32-byte RAM backed by flash; retains battery state (SoC, cycle count, self-discharge history) across deep discharge or short-circuit events |
| Self-discharge modeling engine | SCR register increments at 1 count/hour @25°C, doubling per +10°C - enables accurate shelf-life estimation without host CPU overhead |
| Low-power sleep mode | Enters <2 µA state on command; wakes only for SCR maintenance or HDQ activity - extends pack standby life by orders of magnitude |
Applications
| Smartphone Battery Pack | PDA Power Management |
|---|---|
Use Scenario: Real-time SoC estimation and health monitoring in single-cell Li-ion smartphone batteries under dynamic load profiles. IC Role / Device Role / Timing Role: Coulomb counter and temperature-aware self-discharge tracker; provides host MCU with calibrated DCR/CCR/SCR values via HDQ every 10 seconds. Use Value: Enables accurate battery percentage display and predictive low-battery warnings without requiring periodic full re-calibration. |
Use Scenario: Long-term capacity retention tracking in enterprise-grade PDAs used in field service applications with intermittent charging. IC Role / Device Role / Timing Role: Non-volatile register keeper; stores manufacturing date, cycle count, and chemistry-specific parameters in flash-shadowed RAM across power-loss events. Use Value: Preserves battery warranty data and degradation history even after accidental short-circuit or deep discharge. |
| Wearable Device Battery | Medical Portable Monitor |
Use Scenario: Ultra-low-power battery monitoring in compact wearable devices where PCB area and quiescent current are critical constraints. IC Role / Device Role / Timing Role: Sleep-mode SoC manager; wakes only hourly to update SCR and returns to <2 µA state - minimizing average current draw. Use Value: Extends usable runtime between charges by reducing background monitoring overhead by >95% versus active polling solutions. |
Use Scenario: Reliable battery telemetry in Class II medical devices requiring traceable, tamper-resistant battery history logs. IC Role / Device Role / Timing Role: Secure parameter vault; uses factory-programmed 8-byte ID ROM and write-protected flash pages to store calibration certificates and usage logs. Use Value: Meets IEC 62304 software lifecycle requirements by providing immutable battery event records for audit and regulatory submission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ26100PW | No integrated temperature sensor; lacks SCR self-discharge tracking; identical VFC resolution and HDQ interface | Suitable only for ambient-temperature-stable applications without thermal derating needs | Select when cost sensitivity outweighs thermal modeling requirements and board space allows external thermistor |
| BQ27200YZFT | Wafer-level chip-scale package (DSBGA); adds gas-gauge firmware engine; requires different host driver stack | Designed for embedded firmware-based SoC calculation rather than host-controlled register interpretation | Choose when migrating to TI's newer impedance-track architecture and accepting tighter layout constraints |
Compared with BQ26200PW, BQ26100PW omits die temperature sensing and self-discharge compensation - limiting accuracy in variable-temperature environments - while BQ27200YZFT shifts intelligence to on-chip firmware, increasing host independence but requiring redesign of communication and calibration logic.
Availability
BQ26200PW is available at Aetrix Electronics and suitable for smartphone battery packs, PDA power systems, and medical portable monitors requiring stable component supply, long-lifecycle support, and guaranteed traceability for safety-critical designs.
Supply support for BQ26200PW 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 BQ26200PW belongs to TI's legacy battery fuel gauge portfolio, engineered specifically for host-controlled, register-level battery monitoring in cost-sensitive, space-constrained portable electronics where precision coulomb counting and non-volatile state retention are essential.
FAQ
What is the primary function of the BQ26200PW in a battery pack?
The BQ26200PW serves as a precision coulomb counter and battery state monitor. It measures charge/discharge current via differential sense inputs (SRP/SRN), integrates that current over time using an auto-calibrating VFC, and reports accumulated counts (DCR/CCR), self-discharge (SCR), and temperature (TMPH/TMPL) to a host controller via HDQ. The BQ26200PW does not perform gas-gauge calculations itself - those are handled by the host system using the raw counter data.
Does the BQ26200PW require an external crystal oscillator?
No, the BQ26200PW does not require an external crystal oscillator. It features a high-accuracy internal temperature-compensated oscillator whose frequency is set by an external resistor connected to the OSC pin. A 100 kΩ ±0.1% resistor yields ±3% timer accuracy over temperature, eliminating BOM cost and PCB area for a crystal while maintaining sufficient precision for battery timing functions.
How does the BQ26200PW handle current-sense offset drift?
The BQ26200PW performs continuous, automatic offset compensation on the VFC front-end. This hardware-based correction maintains offset within −17.7 µV to +12.5 µV across supply voltage (2.8–4.3 V) and temperature, eliminating the need for host-initiated calibration routines or manual trimming. The BQ26200PW achieves this without interrupting ongoing charge/discharge counting or requiring any host intervention.
What memory types are available on the BQ26200PW and how are they used?
The BQ26200PW integrates 8 bytes of factory-programmed ID ROM (unique serial number), 32 bytes of flash-shadowed RAM (user-accessible volatile storage backed by flash), and 64 bytes of general-purpose flash (for chemistry parameters, calibration data, and logs). The BQ26200PW transfers RAM contents to flash via FCMD register commands, ensuring critical battery state survives deep discharge or short-circuit events - a key reliability feature for field-deployed packs.
Can the BQ26200PW operate directly from a single Li-ion cell?
Yes, the BQ26200PW operates natively from a single Li-ion cell. Its 2.8 V to 5.5 V supply range covers the full discharge-to-charge voltage profile of Li-ion (≈2.8 V to 4.3 V). For multi-cell Ni-based packs (3–4 cells), the BQ26200PW can also run directly, or use the REG pin to drive an external N-JFET for local regulation - enabling flexible power architecture without adding discrete regulators. The BQ26200PW maintains full functionality across this entire voltage range.
BQ26200PW 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:
- 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
BQ26200PW FAQ
1.How can I place an order for BQ26200PW through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ26200PW 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 BQ26200PW reliable?
The price and inventory of BQ26200PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ26200PW is usually 5 days.
3.What payment methods are accepted for BQ26200PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ26200PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ26200PW?
BQ26200PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ26200PW 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 BQ26200PW?
For technical support, including BQ26200PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ26200PW requirements.
6.How does Aetrix verify that BQ26200PW is sourced from the original manufacturer or authorized distributors?
All BQ26200PW 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 BQ26200PW meets industry standards.
7.What is the process for return or replacement of BQ26200PW?
All BQ26200PW units undergo pre-shipment inspection (PSI). If there is an issue with BQ26200PW, 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 BQ26200PW part is unused and in its original packaging.
Return procedure for BQ26200PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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