Can I request technical information for BQ27541DRZR?

Yes. Contact our team for datasheets, package information, product specifications, alternative parts and sourcing support related to BQ27541DRZR.

cart ()

BQ27541DRZR Texas Instruments product image

SOURCING SUPPORT

Need Help With BQ27541DRZR?

Contact our sourcing team for current stock, batch information, lead time, technical documents, alternative parts and volume pricing.

Stock & Batch Verification Confirm available quantity, date code and delivery schedule.

Alternative Part Sourcing Request compatible or replacement parts when stock is limited.

Quality & Packaging Check Confirm product condition, packaging type and shipment protection before dispatch.

Submit RFQ Contact Sales

: Supplier Verification
Supplier review and component quality inspection support.

: Technical Documents
Datasheet and specification confirmation for engineers.

: One-Stop BOM Sourcing
Multi-part procurement and shortage sourcing assistance.

Texas Instruments RFQ AVAILABLE

BQ27541DRZR

IC BATT FUEL GAUGE LI-ION 12SON

Part Number: BQ27541DRZR

Manufacturer: Texas Instruments

Category: Battery Management

Package: 12-VFDFN Exposed Pad

Datasheet:: BQ27541DRZR.pdf

Description: IC BATT FUEL GAUGE LI-ION 12SON

Select Quantity Stock: 152,144

Request RFQ Add to RFQ List

Qty.	Unit Price	Ext. Price
60+	$2.50500	$150.30

Request RFQ Add to RFQ

Part Number

Quantity *

Target Price

Name *

Company *

Email *

Comments

Compare Favorite

PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

BQ27541DRZR Single-Cell Li-Ion Battery Fuel Gauge with Impedance Track™ Technology

A comprehensive technical overview of the BQ27541DRZR, a single-cell Li-Ion battery fuel gauge from Texas Instruments featuring Impedance Track™ technology for accurate capacity prediction. Covers device function, core features, electrical specifications, 12-lead SON package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 12-Lead SON (DRZ) 2.7V to 5.5V

Device Classification Single-Cell Li-Ion Battery Fuel Gauge

Part Number: BQ27541DRZR

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +85°C

PRODUCT OVERVIEW

What Is the BQ27541DRZR?

BQ27541DRZR is a single-cell Li-Ion battery fuel gauge from Texas Instruments utilizing proprietary Impedance Track™ technology for high-accuracy capacity prediction. Designed as a microcontroller peripheral for battery pack integration, this device provides fuel gauging for single-cell Li-Ion battery packs and can be interrogated by a system processor to provide cell information such as state-of-charge (SOC), time-to-empty (TTE), and time-to-full (TTF).[reference:0][reference:1]

The BQ27541DRZR measures cell voltage, temperature, and current to determine battery state-of-charge. It monitors charge and discharge activity and uses Texas Instruments' proprietary Impedance Track™ algorithm to achieve state-of-charge predictions with less than 1% error across a wide variety of operating conditions and over the lifetime of the battery.[reference:2]

Information is accessed through a series of commands via the I²C interface. The device includes an internal temperature sensor and provides 96 bytes of user-programmable data flash memory. The BQ27541DRZR is available in a compact 12-lead SON (DRZ) package and is rated for operation from –40°C to +85°C.[reference:3][reference:4]

Impedance Track™ Technology Proprietary algorithm achieves less than 1% SOC error across a wide variety of operating conditions and over the lifetime of the battery.

High Integration & Low Power 96 bytes of user-programmable flash memory, internal temperature sensor, and integrated LDO in a compact 12-lead SON package.

Wide Operating Range 2.7V to 5.5V supply voltage with –40°C to +85°C temperature range for versatile battery applications.

DEVICE HIGHLIGHTS

Key Features and Benefits of BQ27541DRZR

Impedance Track™ Fuel Gauging

Proprietary Texas Instruments algorithm provides accurate state-of-charge prediction with less than 1% error across a wide variety of operating conditions and over the lifetime of the battery.[reference:5]

Integrated Temperature Sensing

Internal temperature sensor for system temperature reporting and battery temperature monitoring via the TS input, supporting the fuel gauging algorithm and charger-control sections.[reference:6]

96 Bytes of User-Programmable Memory

96 bytes of user-programmable data flash memory, partitioned into three 32-byte blocks for manufacturer information and configuration data.[reference:7]

I²C Interface

I²C-compatible interface supports communication with system processors for accessing cell information such as SOC, TTE, and TTF through Standard and Extended Commands.[reference:8]

Wide Supply & Sense Range

Supply voltage: 2.7V to 5.5V. Supports low-value sense resistors (5mΩ to 20mΩ) for flexible current sensing.[reference:9]

Compact 12-Pin SON Package

Available in a space-saving 2.5mm × 4mm, 12-lead SON (DRZ) package with 0.4mm pitch, ideal for space-constrained battery pack designs.[reference:10][reference:11]

REFERENCE DATA

Technical Specifications for BQ27541DRZR

Part Number	BQ27541DRZR	Manufacturer	Texas Instruments
Device Type	Single-Cell Li-Ion Battery Fuel Gauge	Series	Impedance Track™
Function	Multi-Function Controller	Battery Chemistry	Lithium-Ion / Lithium-Polymer
Supply Voltage (VDD)	2.7V to 5.5V	Operating Temperature	-40°C to +85°C
Interface	I²C	Fault Protection	Over Temperature
Number of Cells	1	Sense Resistor Range	5mΩ to 20mΩ
Package	12-Lead SON (DRZ)	Package Body Size	2.5mm × 4.0mm
Package / Case	12-VFDFN Exposed Pad	Supplier Device Package	12-SON (2.5x4)
Pin Pitch	0.4mm	Mounting Type	Surface Mount
Moisture Sensitivity Level	Level-2-260C-1 YEAR	RoHS	Compliant
Packaging	Tape & Reel (3,000 per Reel)	Device Marking	BQ / 7541
Lifecycle Status	NRND / Obsolete	Product Status	Not Recommended for New Designs

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for BQ27541DRZR

Configuration & Operation

The BQ27541DRZR is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs:

Fuel Gauging: Measures cell voltage, temperature, and current to determine battery SOC[reference:12]
Impedance Track™ Algorithm: Achieves less than 1% SOC error across a wide variety of operating conditions[reference:13]
I²C Interface: Standard commands provide cell information such as SOC, TTE, and TTF[reference:14]
96-Byte Flash Memory: User-programmable data flash for manufacturer information[reference:15]
Internal Temperature Sensor: Provides system temperature reporting[reference:16]
Low-Value Sense Resistor: Supports 5mΩ to 20mΩ for flexible current sensing[reference:17]

PCB and Power-Supply Guidance

Battery fuel gauge performance depends on layout, bypassing, and power supply quality:

Power Supply: VDD supply voltage from 2.7V to 5.5V; internal integrated LDO provides 2.5V output[reference:18]
Bypass Capacitors: Decouple BAT with 0.1 µF capacitor and REGIN with 0.1 µF ceramic capacitor[reference:19]
REG25 Capacitor: Connect a minimum 0.47 µF ceramic capacitor from REG25 to VSS[reference:20]
Sense Resistor Connection: Kelvin connect SRP and SRN pins to the sense resistor (5mΩ to 20mΩ) for accurate current measurement[reference:21]
TS Input: Connect a 103AT-type thermistor to the TS pin for battery temperature monitoring[reference:22]
I²C Interface: Use 10kΩ pull-up resistors on SDA and SCL lines for proper communication[reference:23]
SE Pin: System Shutdown Enable output allows the fuel gauge to power-off through an external circuit[reference:24]
BAT Input: Battery voltage sense input for cell voltage measurement[reference:25]
Verify the recommended PCB footprint from the official datasheet before production

12-LEAD SON (DRZ)

Pin Configuration Reference for BQ27541DRZR

BQ 7541

SON (DRZ) TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The DRZ package has 12 pins with 0.4mm pitch and a 2.5mm × 4.0mm body size. Device marking is "BQ" on top row and "7541" on second row.

1 SE Shutdown Enable Output - Push-pull output; allows fuel gauge to power-off through external circuit[reference:26]

2 REG25 Internal LDO Output - 2.5V regulated output; connect min 0.47µF ceramic capacitor[reference:27]

3 REGIN Internal LDO Input - Connect 0.1µF ceramic capacitor[reference:28]

4 BAT Battery Voltage Sense Input - Cell voltage measurement input; decouple with 0.1µF capacitor[reference:29]

5 VCC Processor Power Input - System power supply for the device[reference:30]

6 VSS Ground - Device ground reference[reference:31]

7 SRP Sense Resistor Positive - Connect to coulomb counter positive input; nearest CELL- connection[reference:32]

8 SRN Sense Resistor Negative - Connect to coulomb counter negative input; nearest PACK- connection[reference:33]

9 TS Temperature Sense Input - Connect 103AT-type thermistor for battery temperature monitoring[reference:34]

10 SDA I²C Data Line - Open-drain bidirectional data line; use 10kΩ pull-up resistor[reference:35]

11 SCL I²C Clock Line - Serial clock input; use 10kΩ pull-up resistor[reference:36]

12 HDQ HDQ Serial Communications Line - Alternative communication interface; open-drain[reference:37]

APPLICATION AREAS

Typical Applications for BQ27541DRZR

Single-Cell Li-Ion Battery Packs

Fuel gauging for single-cell Li-Ion and Li-Polymer battery packs in portable devices.[reference:38]

Portable Consumer Electronics

Smartphones, tablets, and portable media players requiring accurate battery capacity monitoring.[reference:39]

Notebook Computers

Battery management for notebook and ultrabook battery packs.[reference:40]

Digital Cameras

Fuel gauging for camera battery packs with accurate SOC and runtime prediction.

Portable Medical Devices

Battery monitoring for portable medical equipment and handheld diagnostic devices.[reference:41]

Industrial Portable Equipment

Battery fuel gauging for handheld industrial test and measurement equipment.

REPLACEMENT GUIDANCE

Selecting an Alternative for BQ27541DRZR

A replacement for the BQ27541DRZR should not be selected only by product category. The electrical characteristics, package, and pin configuration must be evaluated against the actual circuit requirements.

Battery chemistry (Li-Ion/Li-Polymer, single-cell)

Supply voltage range (2.7V–5.5V)

Interface (I²C, 400 kHz)

Impedance Track™ technology

Package (12-lead SON, 2.5mm × 4mm)

Temperature range (–40°C to 85°C)

Internal temperature sensor

User-programmable flash memory (96 bytes)

Family alternatives: BQ27541DRZR-G1 (G1 firmware version, same electrical specs)[reference:42], BQ27541DRZR-V200 (V200 firmware version, same electrical specs)[reference:43], BQ27541DRZT (different tape and reel packaging, 250 units)[reference:44], BQ27541DRZT-G1 (G1 firmware, different packaging). For new designs, Texas Instruments recommends newer generation fuel gauge devices such as the BQ27542 or BQ27545-G1. Select based on firmware version, packaging, and qualification requirements. The BQ27541DRZR is NRND (Not Recommended for New Designs) and obsolete.[reference:45][reference:46]

Alternative Part Support

Send the original part number, application, required quantity, and key parameters to Haishengye Electronics for replacement-part sourcing support.

Ask About Alternatives

MANUFACTURER INFORMATION

Texas Instruments

The BQ27541 (BQ27541DRZR) belongs to the Impedance Track™ battery fuel gauge portfolio of Texas Instruments. The device is designed for single-cell Li-Ion battery fuel gauging with high-accuracy capacity prediction. The BQ27541DRZR is a base part number that encompasses multiple firmware versions including G1 (1.12) and V200 (2.00).[reference:47][reference:48]

SUPPLIED BY

Haishengye Electronics

Haishengye Electronics provides electronic component stock supply, BOM sourcing, quotation support, and quality inspection services for BQ27541DRZR and related devices.

Submit Your Requirements

Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

TECHNICAL RESOURCES

BQ27541DRZR Technical Information

Specifications
FAQ
Hot Sale
Packaging
Related Products

Specifications

Product Attribute: Attribute Value

Part Number: BQ27541DRZR

Manufacturer: Texas Instruments

Package: 12-VFDFN Exposed Pad

Series: Impedance Track™

Package/Case: 12-VFDFN Exposed Pad

Packaging: Tape & Reel (TR)

Product Status: Obsolete

Function: Multi-Function Controller

Battery Chemistry: Lithium Ion

Number of Cells: 1

Fault Protection: Over Temperature

Interface: I2C

Operating Temperature: -40°C ~ 85°C (TA)

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 12-SON (2.5x4)

Frequently Asked Questions

1. How can I order BQ27541DRZR from Haishengye Electronics?

Submit an RFQ directly on this page with your required quantity, target price and delivery requirements. Our sales team will review the request and provide a quotation.

2. How does Haishengye Electronics verify the quality of BQ27541DRZR?

We work with qualified suppliers and review sourcing channels, traceability, packaging and product condition before shipment.

3. Are the stock and price of BQ27541DRZR updated in real time?

Electronic component inventory and prices may change frequently. Displayed values are references, and final stock and pricing will be confirmed in the quotation.

4. Which payment methods are supported?

Wire Transfer, PayPal, Alipay, WeChat, Credit Card, Western Union, MoneyGram and Escrow may be supported depending on the order and destination.

5. How is international shipping arranged?

International shipping may be arranged through DHL, UPS, FedEx, TNT and other logistics channels. Tracking information will be provided after shipment.

6. What is the return or replacement process for BQ27541DRZR?

Contact our sales team within the agreed period if there are quantity differences, incorrect items or clear external defects. Products should remain unused and in their original packaging.

7. Can I request technical support for BQ27541DRZR?

Yes. Contact our team for datasheets, package details, product specifications, alternative parts and sourcing assistance.

Hot Sale Part Numbers

LT3045HDD#TRPBF LT3480MPMSE LTC3638MPMSE#TRPBF STA309A13TR ADS1282HPW LTC3805HMSE#TR LTC2851HMS8 74AHC245PW,112 ADS1282HKV/EM LT301001C ADS1294IPAGR LT3010MPMS8E MP8795HGLE-P SN74LVC8T245PWRG4 DAC8811IBDGKTG4 88E1543-A1-LKJ2C000 PTVS30VP1UP-QX LTC3787MPGN LTC6995IDCB-2 UCC33020QRAQRQ1 88E1512-A0-NNP2C000 88E1145-E1-BBM1I000 UCC 74HCT08D TPS563201DDCT TMS5703135CPGEQQ1 DAC8811ICDGKR LT3090MPMSE LTC3646IDE-1 LTC3630AMPMSE#TRPBF

Packaging and Shipping Protection

Step 1 Product Inspection

Step 2 Casing & Dry Pipe

Step 3 Anti-static Bags

Step 4 Inner Carton

Step 5 Shipping Label

Step 6 International Delivery

Packaging may be adjusted according to product type, quantity, moisture sensitivity and destination requirements.

BQ27541DRZR Procurement and Technical Support

BQ27541DRZR is manufactured by Texas Instruments. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

Haishengye Electronics supports customers sourcing BQ27541DRZR and related electronic components for prototype development, maintenance, NPI, production preparation and one-stop BOM procurement.

Submit an RFQ to request the latest stock, price, lead time, batch information, alternative parts, package confirmation or technical documents for BQ27541DRZR.

Part Number: BQ27541DRZR

Manufacturer: Texas Instruments

Package: 12-VFDFN Exposed Pad

Category: Battery Management

Submit BOM RFQ Contact Sales

Payment Method

PayPal Bank Transfer VISA Mastercard Western Union

Transaction fees are charged according to the selected bank or payment system rules.

Shipping Method

DHL

FedEx

UPS

TNT

Shipped From

Shenzhen warehouse

Dispatch Time

Usually 1–3 business days after confirmation

Lead Time

Shipping Fee

Calculated according to destination and parcel weight

Get Shipping Estimate

Submitting...

Please wait while we submit your inquiry.

Comparison List

Clear All