BQ25071-Q1 Automotive 1-A, Single-Input, Single-Cell LiFePO4 Linear Battery Charger | TI.com

BQ25071-Q1 (ACTIVE)

Automotive 1-A, Single-Input, Single-Cell LiFePO4 Linear Battery Charger

 

Description

The bq25071-Q1 is a highly integrated, linear, LiFePO4 battery charger targeted at space-limited automotive applications. It accepts power from either a USB port or AC adapter and charges a single-cell LiFePO4 battery with up to 1 A of charge current. The 30-V input rating supports low-cost unregulated adapters.

The bq25071-Q1 has a single power output that simultaneously charges the battery and powers the system. The input current is programmable from 100 mA up to 1 A using the ISET input or configurable for USB500. There is also a 4.9 V ±10% 50 mA LDO integrated into the IC for supplying low power external circuitry.

The LiFePO4 charging algorithm removes the current taper typically seen as part of the constant voltage mode control used in Li-Ion battery charge cycles which reduces charge time significantly. Instead, the battery is fast charged to the overcharge voltage and then allowed to relax to a lower float charge voltage threshold. The charger integrates the power stage with the charge current and voltage sense to achieve a high level of accuracy in the current and voltage regulation loops. An internal control loop monitors the IC junction temperature through the charge cycle and reduces the charge current if an internal temperature threshold is exceeded.

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C5
  • Single Cell LiFePO4 Charging Algorithm
  • 30-V Input Rating, With 10.5-V Overvoltage
    Protection (OVP)
  • 50-mA Integrated Low Dropout Linear Regulator
    (LDO)
  • Programmable Charge Current Through ISET and
    EN Terminals
  • Thermal Regulation and Protection
  • Soft-Start Feature to Reduce Inrush Current
  • Battery NTC Monitoring
  • Charging Status Indication
  • 10-Pin SON (2mm x 3mm) Package with Wettable
    Flanks

Parametrics

Compare all products in Battery charger ICs Email Download to Excel
Part number Order Number of series cells Function Cell chemistry Charge current (Max) (A) Operating Vin (Min) (V) Operating Vin (Max) (V) Absolute Vin (safety rating) (Max) ((V)) Battery charge voltage (Min) (V) Battery charge voltage (Max) (V) Features Control interface Control topology Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ25071-Q1 Order now 1     Charger     Lithium Phosphate/LiFePO4     1     3.75     8     30     3.5     3.5     OVP
Thermal Regulation
UVLO    
Standalone (RC-Settable)     Linear     Automotive     -40 to 125     WSON | 10     See datasheet (WSON)    
BQ24030-Q1 Samples not available 1     Charger     Li-Ion/Li-Polymer     1.5     4.35     16     18     4.2     4.2     Integrated LDO
Power Path
Temp Monitoring (Thermistor Pin)
UVLO    
Standalone (RC-Settable)     Linear     Automotive     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24031-Q1 Samples not available 1     Charger     Li-Ion/Li-Polymer     1.5     4.35     16     18     4.1     4.1     Integrated LDO
Power Path
Temp Monitoring (Thermistor Pin)
UVLO    
Standalone (RC-Settable)     Linear     Automotive     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24075-Q1 Order now 1     Charger     Li-Ion/Li-Polymer     1.5     4.35     6.4     28     4.2     4.2     OVP
Power Path
Temp Monitoring (Thermistor Pin)
UVLO
VINDPM    
Standalone (RC-Settable)     Linear     Automotive     -40 to 125     VQFN | 16     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)    
BQ24081-Q1 Order now 1     Charger     Li-Ion/Li-Polymer     1     4.5     6.5     7     4.2     4.2     Integrated FET
Temp Monitoring (Thermistor Pin)
UVLO    
Standalone (RC-Settable)     Linear     Automotive     -40 to 125     VSON | 10     10VSON: 9 mm2: 3 x 3 (VSON | 10)    
BQ24105-Q1 Samples not available 1
2
3    
Charger     Li-Ion/Li-Polymer
Lithium Phosphate/LiFePO4    
2     4.35     16     20     2.1     15.5     Integrated FET
OVP
Temp Monitoring (Thermistor Pin)    
Standalone (RC-Settable)     Switch-Mode Buck