BQ25071-Q1 Series
Automotive 1-cell, 1-A, LiFePO4 linear battery charger
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Automotive 1-cell, 1-A, LiFePO4 linear battery charger
| Part | Charge Current - Max [Max] | Qualification | Operating Temperature [Min] | Operating Temperature [Max] | Grade | Package / Case | Interface | Mounting Type | Battery Pack Voltage | Fault Protection | Battery Chemistry | Current - Charging | Supplier Device Package | Number of Cells |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ25071QWDQCTQ1 | 1 A | AEC-Q100 | -40 °C | 125 °C | Automotive | 10-WFDFN Exposed Pad | USB | Surface Mount, Wettable Flank | 3.5 V | Over Temperature, Over Voltage | Lithium Iron Phosphate | Constant - Programmable | 10-WSON (3x2) | 1 |
Texas Instruments BQ25071QWDQCRQ1 | 1 A | AEC-Q100 | -40 °C | 125 °C | Automotive | 10-WFDFN Exposed Pad | USB | Surface Mount, Wettable Flank | 3.5 V | Over Temperature, Over Voltage | Lithium Iron Phosphate | Constant - Programmable | 10-WSON (3x2) | 1 |
Key Features
• Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to 125°CAmbient Operating Temperature RangeDevice HBM ESD Classification Level H2Device CDM ESD Classification Level C5Single Cell LiFePO4Charging Algorithm30-V Input Rating, With 10.5-V OvervoltageProtection (OVP)50-mA Integrated Low Dropout Linear Regulator(LDO)Programmable Charge Current Through ISET andEN TerminalsThermal Regulation and ProtectionSoft-Start Feature to Reduce Inrush CurrentBattery NTC MonitoringCharging Status Indication10-Pin SON (2mm x 3mm) Package with WettableFlanksQualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to 125°CAmbient Operating Temperature RangeDevice HBM ESD Classification Level H2Device CDM ESD Classification Level C5Single Cell LiFePO4Charging Algorithm30-V Input Rating, With 10.5-V OvervoltageProtection (OVP)50-mA Integrated Low Dropout Linear Regulator(LDO)Programmable Charge Current Through ISET andEN TerminalsThermal Regulation and ProtectionSoft-Start Feature to Reduce Inrush CurrentBattery NTC MonitoringCharging Status Indication10-Pin SON (2mm x 3mm) Package with WettableFlanks
Description
AI
The bq25071-Q1 is a highly integrated, linear, LiFePO4battery charger targeted at space-limited automotive applications. It accepts power from either a USB port or AC adapter and charges a single-cell LiFePO4battery 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 LiFePO4charging 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.
The bq25071-Q1 is a highly integrated, linear, LiFePO4battery charger targeted at space-limited automotive applications. It accepts power from either a USB port or AC adapter and charges a single-cell LiFePO4battery 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 LiFePO4charging 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.