stusbcd01b STMicroelectronics, stusbcd01b Datasheet - Page 6

• Manufacturer Part Number: stusbcd01b
• Description: Usb Charger Detection Interface
• Manufacturer: STMicroelectronics

3.4
3.5
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Detection triggering
USB Charger detection automatically starts when V
and shutdown input is low.
If V
detection is immediately terminated.
If no charger is detected (DETECT = 0 and /OE = 0), V
threshold and V
If a charger is detected, detect and status pins are kept high until V
V
Any hardware detection (V
V
V
The STUSBCD01B features a built in over voltage protection circuit which prevents V
voltage from going over 6 V. The device is able to withstand continuous voltages of up to
10 V applied to V
the voltage to 6 V within 1 µs. A 470 Ω resistor in series between V
is required. Any external device needing V
STUSBCD01B's V
Minimum input resistance for V
400 kΩ.
Internal regulator
The STUSBCD01B has an internal regulator which outputs 1.8 V (nominal) to supply
internal blocks. The regulator does not require any bypass capacitor for stability.
TH_VBUS
TH_IO
BUS
BUS
threshold.
drops under V
clamping
threshold or a new detection is started.
IO
BUS
is not present then a new detection is started every 1 s.
BUS
pin through an external resistor; in this case the clamping circuit limits
TH_VBUS
pin.
IO
not present) is terminated as soon as V
threshold or shutdown input is pulled high, the charger
BUS
pin in normal operating conditions (up to ~ 5.3 V) is
BUS
over-voltage protection must be connected to
BUS
BUS
voltage is over V
voltage is kept over V
BUS
BUS
IO
voltage and V
voltage rises above
drops under
TH_VBUS
TH_VBUS
threshold
BUS
BUS
pin