Standalone 1-cell 1.5-A linear charger, Power Path, 4.2-V VBAT and VOUT=VBAT + 225mV
Product details
Parameters
Package | Pins | Size
Features
- Fully compliant USB charger
- Selectable 100-mA and 500-mA maximum input current
- 100-mA Maximum current limit ensures compliance to USB-IF standard
- Input-based dynamic power management (VIN-DPM) for protection against poor USB sources
- 28-V Input Rating with Overvoltage Protection
- Integrated dynamic power path management (DPPM) function simultaneously and independently powers the system and charges the battery
- Supports up to 1.5-A charge current with current monitoring output (ISET)
- Programmable input current limit up to 1.5 A for wall adapters
- System output tracks battery voltage (bq24072)
- Programmable termination current (bq24074)
- Battery disconnect function with SYSOFF input (bq24075, bq24079)
- Programmable Pre-charge and Fast-charge safety timers
- Reverse current, short-circuit and thermal protection
- NTC thermistor input
- Proprietary start-up sequence limits inrush current
- Status indication – Charging/done, power good
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Description
The BQ2407x series of devices are integrated Li-Ion linear chargers and system power path management devices targeted at space-limited portable applications. The devices operate from either a USB port or an AC adapter and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the BQ2407x to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing incorrectly configured USB sources.
The BQ2407x features dynamic power path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination and enables the system to run with a defective or absent battery pack.
Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally discharged battery. The power-path management architecture also lets the battery supplement the system current requirements when the adapter cannot deliver the peak system currents, thus enabling the use of a smaller adapter.
The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The input current limit and charge current are programmable using external resistors.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
This user’s guide describes the bq24072/3/4/5/9(T) and bq24230/2 (bqTiny-III™) evaluation module (EVM). The EVM provides a convenient method for evaluating the performance of a charge management and system power solution for portable applications using the bq24072/3/4/5/9(T) and (...)
Features
- Input current limiting: 100 or 500 mA for USB, user-programmable for non-USB applications
- Input voltage dynamic power management
- 28V max Vin with OVP
- Dynamic Power Management with integrated input and charge FETs
- Voltage or current based thermister input options available
Design tools & simulation
Reference designs
Design files
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download TIDA-01395 BOM.pdf (76KB) -
download TIDA-01395 Assembly Drawing.pdf (372KB) -
download TIDA-01395 PCB.pdf (2114KB) -
download TIDA-01395 CAD Files.zip (978KB) -
download TIDA-01395 Gerber.zip (781KB)
Design files
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download TIDA-01358 BOM.pdf (81KB) -
download TIDA-01358 Assembly Drawing.pdf (311KB) -
download TIDA-01358 PCB.pdf (1283KB) -
download TIDA-01358 CAD Files.zip (895KB) -
download TIDA-01358 Gerber.zip (502KB)
Design files
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download TIDA-00292 BOM.pdf (120KB) -
download TIDA-00292 PCB Layout.zip (5840KB) -
download TIDA-00292 Gerber.zip (1520KB)
Design files
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download TIDA-00011 BOM.pdf (123KB) -
download TIDA-00011 Gerber.zip (3708KB)
Design files
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download TIDA-00010 BOM.pdf (123KB) -
download TIDA-00010 Gerber.zip (1353KB)
Design files
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download TIDA-00044 BOM.pdf (42KB) -
download TIDA-00044 PCB.pdf (132KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN (RGT) | 16 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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