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L6924UTR bảng dữ liệu(PDF) 28 Page - STMicroelectronics

tên linh kiện L6924UTR
Giải thích chi tiết về linh kiện  USB compatible battery charger system with integrated power switch for Li-Ion/Li-Polymer
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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L6924UTR bảng dữ liệu(HTML) 28 Page - STMicroelectronics

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Application information: monitoring and protection
L6924U
28/37
Doc ID 14716 Rev 2
8.4
Shutdown
The L6924U has a shutdown pin; when the pin is connected to GND, the device is operating.
When the pin is left floating, the device enters the shutdown mode, the consumption from
the input is dramatically reduced to 60 µA (typ.). In this condition, VREF is turned OFF.
Figure 21.
ST1 and ST2 connection with LEDs or microcontroller
Table 6.
Status LEDs Indications
Charge condition
Description
ST1
ST2
Charge in progress
When the device is in pre-charge or fast-
charge status
ON
OFF
Charge done
When the charging current goes below the
IENDTH
OFF
ON
Stand by mode
When the input voltage goes under
VBAT + 50 mV
OFF
OFF
Bad battery temperature
When the voltage on the TH pin is out of
the programmable window, in accordance
with the NTC or PTC thermistor
ON
ON
Battery absent
When the battery pack is removed
ON
ON
Over time
When TMAXCH or TMAXPRECH expires
ON
ON



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