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PDF XRP7620 Data sheet ( Hoja de datos )
| Número de pieza | XRP7620 | |
| Descripción | 4-Channel Adjustable Current I2C Controlled LED Driver | |
| Fabricantes | Exar Corporation | |
| Logotipo |  |
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June 2009
XRP7620
4-Channel Adjustable Current I2C Controlled LED Driver
Rev. 1.0.0
GENERAL DESCRIPTION
The XRP7620 is a multi purpose 4-channel
independently adjustable current sink driver.
Optimized for LED backlighting and
RGBW/RGBA color mixing applications, the
XRP7620 can also be used as a generic
software programmable current sink I/O
expander.
Supporting an industry standard 2-wire I2C
serial interface, the XRP7620 provides full
independent control of each channel and can
be programmed up to a current of 31.5mA in
steps of 0.5mA. Uniform display brightness is
ensured through better than 3% channel to
channel current matching.
Five internal registers are provided to set
operational configuration and individual
channel current programmation. A specific
shutdown mode allows the device to retain the
previously loaded configuration – operational
and current programming – in order to be
reused upon the next enabling.
The XRP7620 is designed to operate from a
single cell lithium-ion battery or fixed 3.3V or
5.0V power rails and is available in a RoHS
compliant, “green”/halogen free space saving
8-pin 2mmx3mm DFN package.
APPLICATIONS
• LCD Display & Keypad Backlighting
• Color Coded Indicator Lighting
• RGBW/RGBA Color Mixing
• Cell Phones & Handheld Devices
• Generic Current Sink I/O Expander
FEATURES
• 4-Channel LED Current Sink Driver
• Individual Channel Current Control
− Up to 31.5mA per channel / 0.5mA Steps
− 100mV Channel Dropout Voltage
• I2C Serial Interface
• 2.7V - 5.5V Input Voltage Range
• 3% Channel Current Matching
• Register Retention in Shutdown
• Shutdown Current <1µA
• Thermal and UVLO Built-in Protection
• RoHS Compliant, “Green”/Halogen
Free 2x3mm 8-Pin DFN package
www.DaTtaYSPheIeCt4UA.cLomAPPLICATION DIAGRAM
Fig. 1: XRP7620 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
1 page  
XRP7620
4-Channel Adjustable Current I2C Controlled LED Driver
PIN DESCRIPTION
Name
VIN
SDA
SCL
GND
LED4
LED3
LED2
LED1
Pin Number
1
2
3
4
5
6
7
8
Description
Connect a 1µF decoupling capacitor between this pin and the ground pin (pin 4).
I2C Interface Serial Data Input-Output.
I2C Interface Serial Clock Input.
Ground Signal.
LED 4 Input.
Connect a LED between this pin and VIN. Current Value is set by the serial interface.
LED 3 Input.
Connect a LED between this pin and VIN. Current Value is set by the serial interface.
LED 2 Input.
Connect a LED between this pin and VIN. Current Value is set by the serial interface.
LED 1 Input.
Connect a LED between this pin and VIN. Current Value is set by the serial interface.
ORDERING INFORMATION
Part Number
XRP7620IH-F
XRP7620IHTR-F
XRP7620EVB
Temperature
Range
Marking
-40°C≤TJ≤+100°C
7620I
YYWWFX
-40°C≤TJ≤+100°C
7620I
YYWWFX
XRP7620 Evaluation Board
Package
DFN-8L
DFN-8L
Packing
Quantity
Note 1
Bulk
3K/Tape & Reel
Green
Halogen Free
Green
Halogen Free
I2C Address
0x70
0x70
“YY” = Year – “WW” = Work Week – “F”= Green/Halogen Free Package - “X” = Lot Number
XRP7620 may be ordered with alternative I2C addresses – Contact your Exar Sales Representative for further information.
www.DataSheet4U.com
© 2009 Exar Corporation
5/11
Rev. 1.0.0
5 Page 
XRP7620
4-Channel Adjustable Current I2C Controlled LED Driver
REVISION HISTORY
Revision
1.0.0
Date
06/04/2009 Initial release of datasheet
Description
FOR FURTHER ASSISTANCE
Email:
Exar Technical Documentation:
http://www.exar.com/TechDoc/default.aspx?
www.DataSheet4U.com
EXAR CORPORATION
HEADQUARTERS AND SALES OFFICES
48720 Kato Road
Fremont, CA 94538 – USA
Tel.: +1 (510) 668-7000
Fax: +1 (510) 668-7030
www.exar.com
NOTICE
EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve
design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein,
conveys no license under any patent or other right, and makes no representation that the circuits are free of patent
infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a
user’s specific application. While the information in this publication has been carefully checked; no responsibility, however,
is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or
malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its
safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in
writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all
such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
© 2009 Exar Corporation
11/11
Rev. 1.0.0
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet XRP7620.PDF ] | |
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