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BQ27541DRZR-V200

IC BATT FUEL GAUGE LI-ION 12SON

Part Number: BQ27541DRZR-V200

Manufacturer: Texas Instruments

Category: Battery Management

Package: 12-VFDFN Exposed Pad

Datasheet:: BQ27541DRZR-V200.pdf

Description: IC BATT FUEL GAUGE LI-ION 12SON

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

BQ27541DRZR-V200 Single-Cell Li-Ion Battery Fuel Gauge with Impedance Track™ Technology

A comprehensive technical overview of the BQ27541DRZR-V200, 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-V200

Mounting Type: Surface Mount

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

PRODUCT OVERVIEW

What Is the BQ27541DRZR-V200?

BQ27541DRZR-V200 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].

The BQ27541DRZR-V200 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:1][reference:2].

Information is accessed through a series of commands via the I²C interface[reference:3]. The device provides 96 bytes of user-programmable data flash memory, partitioned into three 32-byte blocks: Manufacturer Info Block A, Manufacturer Info Block B, and Manufacturer Info Block C[reference:4]. The BQ27541DRZR-V200 is available in a compact 12-lead SON (DRZ) package and is rated for operation from –40°C to +85°C[reference:5][reference:6].

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[reference:7].

High Integration & Low Power 96 bytes of user-programmable flash memory, internal temperature sensor, and integrated LDO in a compact 12-lead SON package[reference:8][reference:9].

Wide Operating Range 2.7V to 5.5V supply voltage with –40°C to +85°C temperature range for versatile battery applications[reference:10].

DEVICE HIGHLIGHTS

Key Features and Benefits of BQ27541DRZR-V200

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:11].

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:12][reference:13].

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:14].

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:15][reference:16].

Wide Supply & Sense Range

Supply voltage: 2.7V to 5.5V[reference:17]. Supports low-value sense resistors (5mΩ to 20mΩ) for flexible current sensing[reference:18].

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:19][reference:20][reference:21].

REFERENCE DATA

Technical Specifications for BQ27541DRZR-V200

Part Number	BQ27541DRZR-V200	Manufacturer	Texas Instruments
Device Type	Single-Cell Li-Ion Battery Fuel Gauge	Series	Impedance Track™[reference:22]
Function	Multi-Function Controller[reference:23]	Battery Chemistry	Lithium-Ion / Lithium-Polymer[reference:24][reference:25]
Supply Voltage (VDD)	2.7V to 5.5V[reference:26]	Operating Temperature	-40°C to +85°C[reference:27][reference:28]
Interface	I²C[reference:29]	I²C Clock Frequency	400 kHz[reference:30]
Standby Current	3 µA (Typical)[reference:31]	Quiescent Current	90 µA (Typical)[reference:32]
Sense Resistor Range	5mΩ to 20mΩ[reference:33]	Package	12-Lead SON (DRZ)[reference:34]
Package Body Size	2.5mm × 4.0mm[reference:35][reference:36]	Package Thickness	0.85mm[reference:37]
Pin Pitch	0.4mm[reference:38]	Mounting Type	Surface Mount[reference:39]
Moisture Sensitivity Level	Level-2-260C-1 YEAR[reference:40][reference:41]	RoHS	Compliant[reference:42]
Packaging	Tape & Reel (3,000 per Reel)[reference:43][reference:44]	Device Marking	BQ / 7541[reference:45]
Lifecycle Status	NRND (Not Recommended for New Designs)[reference:46]	Product Status	Obsolete[reference:47]

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-V200

Configuration & Operation

The BQ27541DRZR-V200 is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs[reference:48]:

Fuel Gauging: Measures cell voltage, temperature, and current to determine battery SOC[reference:49]
Impedance Track™ Algorithm: Achieves less than 1% SOC error across a wide variety of operating conditions[reference:50]
I²C Interface: Standard commands provide cell information such as SOC, TTE, and TTF[reference:51]
96-Byte Flash Memory: User-programmable data flash for manufacturer information[reference:52]
Internal Temperature Sensor: Provides system temperature reporting[reference:53]
Low-Value Sense Resistor: Supports 5mΩ to 20mΩ for flexible current sensing[reference:54]

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:55]
Bypass Capacitors: Place decoupling capacitors close to the VDD and VSS pins to minimize noise
Sense Resistor Connection: Kelvin connect SRP and SRN pins to the sense resistor for accurate current measurement[reference:56]
TS Input: Connect a thermistor to the TS pin for battery temperature monitoring[reference:57]
I²C Interface: Use pull-up resistors on SDA and SCL lines for proper communication[reference:58]
SE Pin: System Shutdown Enable pin allows the fuel gauge to power-off through an external circuit[reference:59]
BAT Input: Battery voltage sense input for cell voltage measurement[reference:60]
Verify the recommended PCB footprint from the official datasheet before production

12-LEAD SON (DRZ)

Pin Configuration Reference for BQ27541DRZR-V200

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[reference:61]. Device marking is "BQ" on top row and "7541" on second row[reference:62].

1 VSS Ground - Device ground reference[reference:63]

2 SDA I²C Data Line - Bidirectional data for serial communication[reference:64]

3 SCL I²C Clock Line - Serial clock for I²C communication[reference:65]

4 VDD Power Supply - 2.7V to 5.5V[reference:66]

5 TS Temperature Sense Input - Connect to thermistor for battery temperature monitoring[reference:67][reference:68]

6 BAT Battery Voltage Sense Input - Cell voltage measurement input[reference:69]

7 SRP Sense Resistor Positive - Connect to positive side of current sense resistor[reference:70]

8 SRN Sense Resistor Negative - Connect to negative side of current sense resistor; internal coulomb counter reference point[reference:71]

9 VREG Internal LDO Output - 2.5V regulated output from internal LDO[reference:72]

10 VCC Battery Pack Connection - Connects to battery positive terminal

11 PACK- Battery Pack Negative - Connects to battery negative terminal

12 SE System Shutdown Enable - Allows fuel gauge to power-off through external circuit[reference:73]

APPLICATION AREAS

Typical Applications for BQ27541DRZR-V200

Single-Cell Li-Ion Battery Packs

Fuel gauging for single-cell Li-Ion and Li-Polymer battery packs in portable devices[reference:74][reference:75].

Portable Consumer Electronics

Smartphones, tablets, and portable media players requiring accurate battery capacity monitoring.

Notebook Computers

Battery management for notebook and ultrabook battery packs.

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.

Industrial Portable Equipment

Battery fuel gauging for handheld industrial test and measurement equipment.

REPLACEMENT GUIDANCE

Selecting an Alternative for BQ27541DRZR-V200

A replacement for the BQ27541DRZR-V200 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 (previous firmware version, G1 variant)[reference:76], BQ27541DRZT-V200 (same V200 firmware, different tape and reel packaging)[reference:77], BQ27545-G1 (advanced version with more features)[reference:78], BQ27542 (newer generation fuel gauge). For new designs, TI recommends newer generation fuel gauge devices. Select based on firmware version, packaging, and qualification requirements. The BQ27541DRZR-V200 is NRND (Not Recommended for New Designs) and obsolete[reference:79][reference:80].

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MANUFACTURER INFORMATION

Texas Instruments

The BQ27541 (BQ27541DRZR-V200) 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 V200 firmware version (2.00) provides enhancements over the previous G1 version (1.12)[reference:81].

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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.

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Specifications

Product Attribute: Attribute Value

Part Number: BQ27541DRZR-V200

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)

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BQ27541DRZR-V200 Procurement and Technical Support

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Part Number: BQ27541DRZR-V200

Manufacturer: Texas Instruments

Package: 12-VFDFN Exposed Pad

Category: Battery Management

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