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AN1441 Datasheet(PDF) 11 Page - STMicroelectronics

Part # AN1441
Description  The ST890 is a low voltage
PDF  13 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1441 Datasheet(HTML) 11 Page - STMicroelectronics

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AN1441
Application information
Doc ID 8422 Rev 2
11/13
Few components are required with the ST890. RSET is 2.7 kΩ in order to obtain an ILIMIT of
500 mA, and the filtering capacitance is used to filter the power supply IN and OUT. The
USB controller is used to control the switch, check the VBUS condition through the FLT pin
and drive the USB data line (D+ and D-). Even the ST7263 microcontroller could be used.
Figure 14.
ST890 USB application
100k
Ω
0.1µF
USB
PORT
1 Vbus
2
D+
3
D-
4 GND
ST890
FLT
7
6
5
8
2
3
4
1
IN
ON
GND
OUT
SET
OUT
IN
USB
CONTROLLER
1µF
1µF
0.1µF
RSET
2.7k
Ω
ONOFF
VCC
GND
CHECK
D+
D -
AM00171v1



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