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bq25703A是一种同步NVDC电池降压/升压充电控制器,为空间受限的多种化学电池充电应用提供了组件数量少的高效解决方案。
NVDC-1配置可将系统电压稳定在电池电压范围内,但不会低于系统最小电压。即便在电池完全放电或被取出时系统仍继续工作。当负载功率超过输入源额定值时,电池会进入补电模式并防止输入源过载。
bq25703A从USB适配器,高电压USB PD源和传统适配器等各种输入源为电池充电
在加电期间,充电器基于输入源和电池状况,将转换器设置为降压,升压或降压/升压配置。充电器自动在降压,升压,降压/升压配置间转换,无需主机控制。
在无输入源的情况下,bq25703A可通过1到4节电池支持On-the-Go(OTG)功能,从而在VBUS上生成4.48V至20.8V电压。在OTG模式下,充电器调节输出电压和出电流。
bq25703A监控适配器电流,电池电流和系统功率。灵活编程的 PROCHOT 输出直达CPU,可根据需要降低其频率。
所有商标均为其各自所有者的财产。
Number of Series Cells |
Function |
Cell Chemistry |
Battery Charge Voltage (Min) (V) |
Battery Charge Voltage (Max) (V) |
Features |
Charge Current (Max) (A) |
Control Interface |
Control Topology |
Rating |
Operating Temperature Range (C) |
Pin/Package |
Operating Vin (Min) (V) |
Operating Vin (Max) (V) |
Absolute Vin (safety rating) (Max) ((V)) |
BQ25703A | BQ24725A | BQ24773 | BQ24780S | BQ25700A |
---|---|---|---|---|
1 2 3 4 | 1 2 3 4 | 1 2 3 4 | 1 2 3 4 | 1 2 3 4 |
Charger | Charger | Charger | Charger | Charger |
Lead Acid Li-Ion/Li-Polymer LiFePO4 Lithium phosphate NiCd NiMH SuperCap | Li-Ion/Li-Polymer | Li-Ion/Li-Polymer LiFePO4 | Lead Acid Li-Ion/Li-Polymer LiFePO4 NiCd NiMH | Lead Acid Li-Ion/Li-Polymer LiFePO4 Lithium phosphate NiCd NiMH SuperCap |
1.024 | 1.024 | 1.024 | 1.024 | 1.024 |
19.2 | 19.2 | 19.2 | 19.2 | 19.2 |
1-4 Cells Integrated ADC USB OTG Over Voltage Protection Power Path Solar Input Standard BAT Temp Monitoring Thermal Regulation Under Voltage Protection Vin DPM (OK for Solar Power Source) USB C/PD | Integrated FET Power Path | Power Path | 1-4 Cells Over Voltage Protection Power Path Thermal Regulation Under Voltage Protection Vin DPM (OK for Solar Power Source) | 1-4 Cells Integrated ADC USB OTG Over Voltage Protection Power Path Solar Input Standard BAT Temp Monitoring Thermal Regulation Under Voltage Protection Vin DPM (OK for Solar Power Source) USB C/PD |
8.128 | 8 | 8 | 8.128 | 8.128 |
I2C | SMBus | I2C | SMBus | SMBus |
Switch-Mode Buck-boost | Switch-Mode Buck | Switch-Mode Buck | Switch-Mode Buck | Switch-Mode Buck-boost |
Catalog | Catalog | Catalog | Catalog | Catalog |
-40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 |
32QFN | 20VQFN | 28WQFN | 28WQFN | 32QFN |
3.5 | 4.5 | 4.5 | 4.5 | 3.5 |
24 | 24 | 24 | 24 | 24 |
30 | 30 | 30 | 30 | 30 |