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PI3USB9281 Datasheet(PDF) 7 Page - Diodes Incorporated

Part # PI3USB9281
Description  USB 2.0 Port Protection with Charger Detection
PDF  13 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

PI3USB9281 Datasheet(HTML) 7 Page - Diodes Incorporated

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2014-04-0004
PT0502-1
04/28/14
7
PI3USB9281
USB 2.0 Port Protection with Charger Detection
Functional Description
USB Port Accessory Detection List
Summarized below in Table 1 are the types of USB2.0 ports that PI3USB9281 can detect.
Table 1. ID and VBUSIN Detection for USB Devices
VBUS
D+
D-
USB
switch
ID Resistance to GND
(5)
CHG
Accessory Detected
(1)
Min.
Typ.
Max.
x
x
x
Enable
GND
GND
GND
Hi-z
OTG
x
x
x
Disable
950Ω
1kΩ
1.05Ω
Hi-z
MHL
5V
x
x
Enable
190kΩ
200kΩ
210kΩ
LOW
Car Kit Type 1 Charger
(2)
5V
x
x
Enable
419.9kΩ
442kΩ
464kΩ
LOW
Car Kit Type 2 Charger
(2)
5V
2V
2.7V
Enable
3MΩ
Open
Open
LOW
1A Apple Charger
5V
2.7V
2V
Enable
3MΩ
Open
Open
LOW
2A Apple Charger
5V
2.7V
2.7V
Enable
3MΩ
Open
Open
LOW
2.4A Apple Charger
5V
(3)
(3)
Enable
3MΩ
Open
Open
LOW
USBBC1.2 DCP mode or Samsung
FAST Charger
(4)
5V
(3)
(3)
Enable
3MΩ
Open
Open
LOW
USB BC1.2 CDP Mode
5V
(3)
(3)
Enable
3MΩ
Open
Open
Hi-z
USB BC1.2 SDP Mode
Notes:
1. The accessory type is reported in the Device Type 1 (0Ah) and Charger Status (0Eh) registers with each valid accessory
detection.
2. Follows the ANSI/CEA-936-A USB Car Kit specification.
3. The PI3USB9281 follows the Battery Charging 1.2 specification, which uses D+ and D- to determine what USB accessory is
attached.
4. Samsung 1.2V fast charger will recognize as DCP attachment and enable the fast charging operation.
5. For devices with ID resistance other than those listed in Table 1, PI3USB9281 reports device attachment through I
2C to the
embedded controller. The Unknown devices are mapped to OTG such that data switches are turned on to allow embedded
controller to communicate and identify the unknown devices through USB protocols.



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