BQ27411DRZT-G1B

Part: bq27411-G1 — Texas Instruments

Type: Single-Cell Li-Ion Battery Fuel Gauge

Description: Single-series cell Li-ion battery fuel gauge using Impedance Track technology, operating with an input voltage range of 2.45 V to 4.5 V and communicating over a 400-kHz I2C interface.

Operating Conditions:

• Supply voltage (BAT pin): 2.45 to 4.5 V
• Operating temperature: -40 to 85 °C
• PROG programming voltage (OTP mode): 7.3 to 7.5 V (7.4 V typical)
• External pull-up voltage (VPU): 1.62 to 3.6 V

Absolute Maximum Ratings:

• Max supply voltage (BAT pin): 6 V
• SRP and SRN pins input voltage: -0.3 to VBAT + 0.3 V
• Differential voltage across SRP and SRN: 2 V
• VDD pin supply voltage: 2 V
• Open-drain IO pins (SDA, SCL): 6 V
• PROG pin input voltage: 7.8 V
• Push-pull IO pins (TEST pin): VDD + 0.3 V
• Operating free-air temperature range: -40 to 85 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Normal mode supply current: 93 μA typical (ILOAD > Sleep Current)
• Sleep mode supply current: 21 μA typical (ILOAD < Sleep Current)
• Hibernate mode supply current: 9 μA typical (ILOAD < Hibernate Current)
• Shutdown mode supply current: 0.6 μA typical
• Internal LDO output voltage: 1.8 V typical
• BAT pin voltage measurement range: 2.45 to 4.5 V (15 bits effective resolution, 125 ms conversion time)
• Coulomb counter input range (BAT to SRX pins): BAT ± 25 mV (16 bits effective resolution, 1 s conversion time)
• I2C clock frequency: up to 400 kHz

Features:

• Single-series cell Li-ion battery fuel gauge residing in battery pack
• Impedance Track algorithm for remaining capacity and state-of-charge (SOC) reporting
• Internal temperature sensor or host-reported temperature support
• One-Time Programmable (OTP) configuration non-volatile memory (NVM)
• External sense resistor support (typically 10 mΩ)
• Integrated LDO regulator powered directly from battery
• Battery state of health (aging) estimation

Applications:

• Smartphones, Feature Phones, and Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players

Package:

• 12-pin VSON (2.50 mm × 4.00 mm)

• 1 · Single-Series Cell Li-Ion Battery Fuel Gauge
• -Resides in Battery Pack
• -Low-Value External Sense Resistor (10 m Ω Typical)
• -One Time Programmable (OTP) Configuration Non-Volatile Memory (NVM)
• -Powered Directly from Battery with Integrated LDO
• -400-kHz I 2 C Serial Interface
• -Internal Temperature Sensor or Host-reported Temperature
• Battery Fuel Gauging Based on Patented Impedance Track™ Technology
• -Reports Remaining Capacity and State of Charge (SOC) with Smoothing Filter
• -Automatically Adjusts for Battery Aging, Selfdischarge, Temperature, and Rate Changes
• -Battery State of Health (Aging) Estimation

• Smartphones, Feature Phones, and Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players

TA = -40°C to 85°C, typical values at TA = 30°C and VREGIN = 3.6 V (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted) (1)

TA = 30°C and VREGIN = VBAT = 3.6 V (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted)

The bq27411-G1 device is a fuel gauging solution for single-series cell Li-Ion battery packs. The device requires minimal configuration and uses One Time Programmable (OTP) Non-Volatile Memory (NVM) to avoid an initialization download by the system processor. To allow for optimal performance in the end application, special considerations must be taken to ensure minimization of measurement error through proper printed circuit board (PCB) board layout. Such requirements are detailed in Design Requirements .