BQ24253
- High-Efficiency Switched-Mode Charger With
Separate Power Path - Startup System From Deeply Discharged or
Missing Battery - USB Charging Compliant
- Selectable Input Current Limit of 100 mA,
500 mA, 900 mA, 1.5 A, and 2 A
- Selectable Input Current Limit of 100 mA,
- BC1.2 Compatible D+, D– Detection
- In Host Mode (After I2C Communication Starts
and Before Watchdog Timer Times Out)- Programmable Battery Charge Voltage,
VBATREG - Programmable Charge Current (ICHG)
- Programmable Input Current Limit (ILIM)
- Programmable Input Voltage-Based Dynamic
Power Management Threshold, (VIN_DPM) - Programmable Input Overvoltage Protection
Threshold (VOVP) - Programmable Safety Timer
- Programmable Battery Charge Voltage,
- Resistor Programmable Defaults for:
- ICHG up to 2 A With Current Monitoring Output
(ISET) - ILIM up to 2 A With Current Monitoring Output
(ILIM) - VIN_DPM (VDPM)
- ICHG up to 2 A With Current Monitoring Output
- Watchdog Timer Disable Bit
- Integrated 4.9 V, 50 mA LDO
- Complete System-Level Protection
- Input UVLO, Input Overvoltage Protection
(OVP), Battery OVP, Sleep Mode, VIN_DPM - Input Current Limit
- Charge Current Limit
- Thermal Regulation
- Thermal Shutdown
- Voltage-Based, JEITA Compatible NTC
Monitoring Input - Safety Timer
- Input UVLO, Input Overvoltage Protection
- 22 V Absolute Maximum Input Voltage Rating
- 10.5 V Maximum Operating Input Voltage
- Low RDS(on) Integrated Power FETs for a Charging
Rate of up to 2 A - Open-Drain Status Outputs
- Synchronous Fixed-Frequency PWM Controller
Operating at 3 MHz for Small Inductor Support - AnyBoot Robust Battery Detection Algorithm
- Charge Time Optimizer for Improved Charge
Times at Any Given Charge Current - 2.40-mm × 2.00-mm 30-Ball DSBGA and 4-mm ×
4-mm 24-Pin QFN Packages
The bq24250, bq24251, and bq24253 are highly integrated single-cell Li-Ion battery chargers and system power-path management devices targeted for space-limited, portable applications with high-capacity batteries. The single-cell charger has a single input that operates from either a USB port or an AC wall adapter for a versatile solution.
The power-path management feature allows the bq24250, bq24251, and bq24253 to power the system from a high-efficiency DC-DC converter while simultaneously and independently charging the battery. The charger monitors the battery current at all times and reduces the charge current when the system load requires current above the input current limit. This reduced charge current allows for proper charge termination and enables the system to run with a defective or absent battery pack. Additionally, this reduced charge current enables instant system turnon even with a totally discharged battery or no battery. The architecture of the power-path management also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. This supplementation of current requirements enables the use of a smaller adapter.
The battery is charged in four phases: trickle charge, precharge, 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. Additionally, a voltage-based, JEITA compatible battery pack thermistor monitoring input (TS) that monitors battery temperature for safe charging is included.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | bq2425x 2A Single-Input I2C, Stand-Alone Switched-Mode Li-Ion Battery Charger With Power-Path Management datasheet (Rev. H) | PDF | HTML | 2015年 8月 20日 |
Analog Design Journal | Battery-charging considerations for high-power portable devices | 2014年 4月 11日 | ||
Application note | Building your own Battery Simulator | 2013年 10月 14日 | ||
Application note | Using bq2425x’s DPM Feature for Solar Panel Applications | 2013年 7月 31日 | ||
Application note | Selecting the Best bq2425x Single Cell I2C, Standalone Switch-Mode Battery Charg | 2013年 6月 17日 |
設計與開發
如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
DSBGA (YFF) | 30 | Ultra Librarian |
VQFN (RGE) | 24 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點