BQ24200 Series
500-mA, 4.2-V Li-ion charger for current-Limited App. w/temp sense in MSOP-8
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
500-mA, 4.2-V Li-ion charger for current-Limited App. w/temp sense in MSOP-8
| Part | Supplier Device Package | Charge Current - Max [Max] | Battery Pack Voltage | Current - Charging | Programmable Features | Number of Cells | Package / Case [x] | Package / Case [x] | Package / Case | Battery Chemistry | Mounting Type | Voltage - Supply (Max) [Max] | Fault Protection | Operating Temperature [Max] | Operating Temperature [Min] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24200DGNR | 8-HVSSOP | 500 mA | 4.2 V | Constant | Current, Timer | 1 | 0.118 in | 3 mm | 8-MSOP, 8-TSSOP, Exposed Pad | Lithium Ion/Polymer | Surface Mount | 13.5 V | Over Temperature, Short Circuit | 125 ¯C | -40 °C |
Texas Instruments BQ24200DGN | 8-HVSSOP | 500 mA | 4.2 V | Constant | Current, Timer | 1 | 0.118 in | 3 mm | 8-MSOP, 8-TSSOP, Exposed Pad | Lithium Ion/Polymer | Surface Mount | 13.5 V | Over Temperature, Short Circuit | 125 ¯C | -40 °C |
Key Features
• Designed Specifically to Work With Current-Limited Wall SuppliesIdeal for Low Dropout Charger Design for Single-Cell Li-Ion Packs With Coke or Graphite AnodesIntegrated PowerFET for 500 mAIntegrated Voltage Regulation With 0.5% AccuracyBattery Insertion and Removal DetectionCharge Termination by Minimum Current and TimePre-Charge Conditioning With Safety TimerSleep Mode for Low-Power ConsumptionCharge Status Output for LED or Host Processor Interface IndicatesCharge-in-Progress, Charge Completion, and Fault ConditionsOptional Temperature Monitoring Before and During ChargeSmall, 8-Pin Power-Pad MSOP PackageDesigned Specifically to Work With Current-Limited Wall SuppliesIdeal for Low Dropout Charger Design for Single-Cell Li-Ion Packs With Coke or Graphite AnodesIntegrated PowerFET for 500 mAIntegrated Voltage Regulation With 0.5% AccuracyBattery Insertion and Removal DetectionCharge Termination by Minimum Current and TimePre-Charge Conditioning With Safety TimerSleep Mode for Low-Power ConsumptionCharge Status Output for LED or Host Processor Interface IndicatesCharge-in-Progress, Charge Completion, and Fault ConditionsOptional Temperature Monitoring Before and During ChargeSmall, 8-Pin Power-Pad MSOP Package
Description
AI
The bq2420x series are simple Li-Ion linear charge management devices targeted at low-cost and space limited charger applications. The bq2420x series offer integrated powerFET, high-accuracy voltage regulation, temperature monitoring, charge status, and charge termination, in a single monolithic device.
The bq2420x is designed to work with a current-limited wall-mount transformer and therefore does not provide any current regulation. However, these devices offer a fixed internal current limit to prevent damage to the internal powerFET. A time-limited pre-conditioning phase is provided to condition deeply discharged cells. Once the battery reaches the charge voltage, the high accuracy voltage regulation loop takes over and completes the charge cycle. Charge is terminated based on minimum current. An internal charge timer provides a backup safety for charge termination.
Other standard features include an automatic sleep mode activated when VCCfalls below the battery voltage falls below the VRCHthreshold.
In addition to the standard features, the core product provides two additional enhancements: temperature monitoring and status display. The temperaturesense circuit continuously measures battery temperature using an external thermistor and inhibits charge until the battery temperature is within the user-defined thresholds. The STAT pin indicates three conditions of operation of the charger. These conditions arecharge-in-progress, charge complete,andfault. This output can be used to drive an LED or an interface to a microcontroller.
The bq2420x series are simple Li-Ion linear charge management devices targeted at low-cost and space limited charger applications. The bq2420x series offer integrated powerFET, high-accuracy voltage regulation, temperature monitoring, charge status, and charge termination, in a single monolithic device.
The bq2420x is designed to work with a current-limited wall-mount transformer and therefore does not provide any current regulation. However, these devices offer a fixed internal current limit to prevent damage to the internal powerFET. A time-limited pre-conditioning phase is provided to condition deeply discharged cells. Once the battery reaches the charge voltage, the high accuracy voltage regulation loop takes over and completes the charge cycle. Charge is terminated based on minimum current. An internal charge timer provides a backup safety for charge termination.
Other standard features include an automatic sleep mode activated when VCCfalls below the battery voltage falls below the VRCHthreshold.
In addition to the standard features, the core product provides two additional enhancements: temperature monitoring and status display. The temperaturesense circuit continuously measures battery temperature using an external thermistor and inhibits charge until the battery temperature is within the user-defined thresholds. The STAT pin indicates three conditions of operation of the charger. These conditions arecharge-in-progress, charge complete,andfault. This output can be used to drive an LED or an interface to a microcontroller.