BQ2057SN (TEXAS INSTRUMENTS)
Зарядное устройство для 1-элементной литий-ионной, Li-Pol батареи, 15В вход, 4.2В/2А зарядка, SOIC-8
The BQ2057SN is an advance linear charge management Integrated Circuit for single and two cell lithium ion and lithium polymer. This IC combines high-accuracy current and voltage regulation, battery conditioning, temperature monitoring, charge termination, charge-status indication and AutoComp charge-rate. The BQ2057 continuously measures battery temperature using an external thermistor. For safety, the IC inhibits charge until the battery temperature is within user-defined thresholds. The IC then charges the battery in three phases conditioning, constant current and constant voltage. If the battery voltage is below the low-voltage threshold V(min), the IC pre-charges using a low current to condition the battery. The conditioning charge rate is approximately 10% of the regulation current. The conditioning current also minimizes heat dissipation in the external pass-element during the initial stage of the charge. After conditioning, the IC applies a constant current to the battery.
- Requires small number of external components
- Better than ±1% voltage regulation accuracy with pre-set voltages
- AutoComp™ Dynamic compensation of battery pack's internal impedance to reduce charge time
- Optional cell-temperature monitoring before and during charge
- Integrated voltage and current regulation with programmable charge-current
- Integrated cell conditioning for reviving deeply discharged cells
- Charge status output for single or dual led or host processor interface
- Automatic battery-recharge feature
- Charge termination by minimum current
- Automatic low-power sleep mode when VCC is removed
- EVMs Available for quick evaluation
- Green product and no Sb/Br
Области применения
Управление Питанием
Входное Напряжение:
15В
Количество Выводов:
8вывод(-ов)
Количество Последовательных Ячеек:
1
Линейка Продукции:
-
Максимальная Рабочая Температура:
70°C
Максимальный Ток Зарядки:
2А
Минимальная Рабочая Температура:
-20°C
Напряжение Зарядки Батареи:
4.2В
Соответствует Фталатам RoHS:
Да
Стиль Корпуса ИС Батареи:
SOIC
Тип Батареи:
Литий-ионная, Литий-полимерная
SVHC (Особо Опасные Вещества):
No SVHC (27-Jun-2018)
RoHS статус:
Да