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BQ24153 Просмотр технического описания (PDF) - Texas Instruments

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BQ24153 Fully Integrated Switch-Mode One-Cell Li-Ion Charger With Full USB Compliance and USB-OTG Support TI
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BQ24153 Datasheet PDF : 41 Pages
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bq24153
bq24156, bq24158
SLUSA27 – MARCH 2010
www.ti.com
Bad Adaptor Detection/Rejection
At the POR of VBUS, the IC performs the bad adaptor detection by applying a current sink to VBUS. If the VBUS
is higher than VIN(MIN) for 30ms, the adaptor is good and the charge process begins. Otherwise, if the VBUS
drops below VIN(MIN), the bad adaptor is detected. Then, the IC disables the current sink, sends a send fault pulse
in FAULT pin and sets the bad adaptor flag (B2-B0=011 for Register 00H). After a delay of TINT, the IC repeats
the adaptor detection process, as shown in Figure 28 and Figure 29.
Adpator
VBUS
VBUS
ISHORT
(30 mA)
Adaptor Detection Control
GND
PGND
VIN
VIN(MIN)
VIN_GOOD
Deglitch
30ms
VIN_POOR
START
Delay
TINT
Figure 28. Bad Adaptor Detection Circuit
20
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