Fairchild FSA9288A Usb 2.0 accessory detection switch with 28v fet Datasheet

FSA9280A / FSA9288A
USB 2.0 Accessory Detection Switch with 28V FET
Description
Features
ƒ
Automatically Detects USB Accessories:
-
Headsets with Microphone and/or Remote
Headphones with/without Remote
USB Port
USB CDP, DCP, or Car Kit Battery Chargers
Factory-Mode Cables
UART Serial Link
TTY Converter
ƒ
Automatically Configures Switch Connections with
Independent Override Capability
ƒ
ƒ
Low-Power Mode When No Accessory Attached
Integrated 28V Over-Voltage and 1.5A OverCurrent Protection FET on VBUS for Fault Isolation
-
Higher Over-Voltage (8V Typical) Option:
FSA9288A
ƒ
ƒ
Negative-Swing-Capable Audio Channel
ƒ
20-Lead Ultrathin Molded Leadless Package
(3mm x 4mm x 0.55mm)
Separate Logic/Power Controls for Enhanced
Factory-Mode Operation
The architecture uses a simple standard resistor to
ground on the ID pin of the accessory’s micro-B or
micro-A/B connector to detect the accessories.
FSA9280A/FSA9288A has advanced modes for wired
remote control sensing for audio accessories and
streamlined detection for simple factory testing. These
devices are designed to allow audio signals to swing
below ground on the USB port data lines.
For additional performance information, please contact
[email protected].
Applications
ƒ
The FSA9280A/FSA9288A is a USB 2.0 port accessory
detector and switch with integrated 28V over-voltage
and 1.5A over-current protected FET. Fully controlled
2
using I C™, FSA9280A/FSA9288A enables USB ports,
stereo and mono audio headphones/headsets with or
without a microphone, TTY (teletype) converters, wired
remote controller with either one button (send/end) or up
to 12 buttons, USB Charging Downstream Port (CDP),
Dedicated Charging Port (DCP) and ANSI/CEA-936-A
USB Car Kit battery chargers, and UART (Universal
Asynchronous Receiver/Transmitter) data cables to use
a common connector, micro or mini USB 2.0 port.
Factory-mode cables can be detected and switched to
use either the UART or USB data path. The
FSA9280A/FSA9288A can be programmed for manual
switching or automatic switching of data paths based on
accessory detected.
Mobile Phones & Portable Media Players
FSA9280A
Figure 1. Typical Application
© 2010 Fairchild Semiconductor Corporation
FSA9280A • Rev 1.0.1
www.fairchildsemi.com
FSA9280A / FSA9288A — USB2.0 Accessory Detection Switch with 28V FET
March 2010
VBAT
Phone
Power
FSA9280A
VBUS_OUT
Charger IC
CHG_DET
Micro
USB
MIC
Audio
Codec
Audio_R
Audio_L
HS USB
3:1
MUX
and
Charge
Pump
RxD
TxD
FS USB
or UART
‐ Detection
OCP,OVP
DP_HOST
DM_HOST
VBUS_IN
DM_CON
DP_CON
ID_CON
GND
Charger
Detect
Interrupt
I2C
Baseband
Processor
INTB
I2C_SCL
I2C_SDA
Switch
Control
and
I2C
Slave
VDDIO
JIG
BOOT
Float
Detect
ADC ID
Detect
Figure 2. Block Diagram
ID_CON
DP_CON
DM_CON
VBUS_IN
Pin Configuration
20
19
18
17
Audio_R
1
16
CHG_DET
Audio_L
2
15
VBUS_OUT
MIC
3
14
I2C_SCL
GND
FSA9280A / FSA9288A — USB2.0 Accessory Detection Switch with 28V FET
Block Diagram
Exposed DAP
DP_HOST
4
13
I2C_SDA
DM_HOST
5
12
INTB
6
11
VBAT
RxD
TxD
BOOT
9
10
JIG
8
VDDIO
7
Figure 3. Pin Assignments (Top View)
© 2010 Fairchild Semiconductor Corporation
FSA9280A • Rev 1.0.1
www.fairchildsemi.com
2
FSA9280A / FSA9288A — USB2.0 Accessory Detection Switch with 28V FET
© 2010 Fairchild Semiconductor Corporation
FSA9280A • Rev 1.0.1
www.fairchildsemi.com
3
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