BQ21080 Series
800-mA Li-ion and LiFePO4 I²C programmable linear charger with regulated power path in WCSP package
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
800-mA Li-ion and LiFePO4 I²C programmable linear charger with regulated power path in WCSP package
| Part | Battery Chemistry | Voltage - Supply (Max) [Max] | Number of Cells | Mounting Type | Programmable Features | Charge Current - Max [Max] | Current - Charging | Supplier Device Package | Supplier Device Package [y] | Supplier Device Package [x] | Operating Temperature [Max] | Operating Temperature [Min] | Interface | Fault Protection | Package / Case | Battery Pack Voltage [Max] | Battery Pack Voltage [Min] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ21080YBGR | Multi-Chemistry | 5.5 V | 1 | Surface Mount | Current, Timer, Voltage | 800 mA | Constant - Programmable | 8-DSBGA | 1.1 | 1.6 | 85 °C | -40 °C | I2C | Over Current, Over Temperature, Over-Under Voltage, Short Circuit | 8-XFBGA, DSBGA | 4.6 V | 2.2 V |
Key Features
• 800-mA Power path linear battery charger3.0-V to 5.9-V input voltage operating range optimized for battery to battery charging and USB adapter25-V tolerant input voltageConfigurable battery regulation voltage with 0.5% accuracy from 3.6 V to 4.65 V in 10-mV steps5-mA to 800-mA configurable fast charge current55-mΩ battery FET ON resistanceUp to 2.5-A discharge current to support high system loadsConfigurable termination current down to 0.5 mAConfigurable NTC charging profile thresholds including JEITA supportPower cycle and advanced reset mechanisms to recover systemPower path management for powering the system and charging the batteryRegulated system voltage (SYS) ranging from 4.4 V to 4.9 V in addition to battery voltage tracking and input pass-though optionsConfigurable input current limitSelectable adapter or battery power for systemDynamic power path management optimizes charging from weak adaptersUltra low quiescent current modes30-nA Shutdown mode3.2-µA Ship mode with button press wake4 µA in Battery Only mode45-µA input adapter Iq in Sleep modeOne push-button wake-up and reset inputIntegrated fault protectionInput overvoltage protection (VIN_OVP)Battery undervoltage protection (VBUVLO)Battery short protection (BATSC)Battery overcurrent protection (BATOCP)Input current limit protection (ILIM)Thermal regulation (TREG) and thermal shutdown (TSHUT)Battery thermal fault protection (TS)Watchdog and safety timer faultSystem short protectionSystem overvoltage protection800-mA Power path linear battery charger3.0-V to 5.9-V input voltage operating range optimized for battery to battery charging and USB adapter25-V tolerant input voltageConfigurable battery regulation voltage with 0.5% accuracy from 3.6 V to 4.65 V in 10-mV steps5-mA to 800-mA configurable fast charge current55-mΩ battery FET ON resistanceUp to 2.5-A discharge current to support high system loadsConfigurable termination current down to 0.5 mAConfigurable NTC charging profile thresholds including JEITA supportPower cycle and advanced reset mechanisms to recover systemPower path management for powering the system and charging the batteryRegulated system voltage (SYS) ranging from 4.4 V to 4.9 V in addition to battery voltage tracking and input pass-though optionsConfigurable input current limitSelectable adapter or battery power for systemDynamic power path management optimizes charging from weak adaptersUltra low quiescent current modes30-nA Shutdown mode3.2-µA Ship mode with button press wake4 µA in Battery Only mode45-µA input adapter Iq in Sleep modeOne push-button wake-up and reset inputIntegrated fault protectionInput overvoltage protection (VIN_OVP)Battery undervoltage protection (VBUVLO)Battery short protection (BATSC)Battery overcurrent protection (BATOCP)Input current limit protection (ILIM)Thermal regulation (TREG) and thermal shutdown (TSHUT)Battery thermal fault protection (TS)Watchdog and safety timer faultSystem short protectionSystem overvoltage protection
Description
AI
The BQ21080 is a linear battery charger IC focusing on small solution size and low quiescent current for extending battery life. The device is available in an 8-ball chipscale package which does not need HDI PCB process for fabrication thereby reducing the PCB cost. The device can support up to 800-mA charging and system loads of up to 2.5 A.
The battery is charged using a standard Li-ion or LiFePO4 charge profile with three phases: precharge, constant current and constant voltage. Thermal regulation provides the maximum charge current while managing the device temperature. The charger is also optimized for battery to battery charging with 3-V minimum input voltage operation and can withstand 25-V absolute maximum line transients. The device integrates a single push-button input and reset circuitry to reduce the total solution footprint.
The BQ21080 is a linear battery charger IC focusing on small solution size and low quiescent current for extending battery life. The device is available in an 8-ball chipscale package which does not need HDI PCB process for fabrication thereby reducing the PCB cost. The device can support up to 800-mA charging and system loads of up to 2.5 A.
The battery is charged using a standard Li-ion or LiFePO4 charge profile with three phases: precharge, constant current and constant voltage. Thermal regulation provides the maximum charge current while managing the device temperature. The charger is also optimized for battery to battery charging with 3-V minimum input voltage operation and can withstand 25-V absolute maximum line transients. The device integrates a single push-button input and reset circuitry to reduce the total solution footprint.