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SP7680EB Datasheet

  • SP7680EB

  • Complete Backlight Solution

  • 16頁

  • SIPEX

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Solved by
.
TM
SP7680
Complete Backlight Solution
LED 2
13
12
11
10
9
5
6
7
8
LED 5
LED 4
15
FEATURES
Complete Backlight Solution
Separate control for 4 main, 2 sub, and keypad LEDs
Built-in 6-bit DAC for precise current setting
2
I C serial interface
Data is stored in shutdown
1x and 1.5x mode operation with automatic switchover
Very low dropout: 200mV typ
Very low 31碌A(chǔ) current (LSB)
2MHz switching frequency reduces external components
Power-saving shutdown mode of 1碌A(chǔ)
Built-in over-temperature protection
Available in Lead Free, RoHS compliant package:
Small 16-pin 3x3 QFN
16
14
LED 6
LED 7
SDA
SCL
1
2
3
4
LED 3
LED 1
GND
C2+
C2-
The SP7680 is a complete backlight display solution that is designed to independently control LEDs for
2
main and auxiliary displays as well as the keypad. A two line I C serial interface allows a simple way to
adjust each current individually in order to provide ultimate flexibility in driving LEDs. The data is loaded
into internal registers upon power up and stored while in shutdown. When the chip is enabled the stored
values set the LED currents. Extra low 33碌A(chǔ) LSB allows trickle current through the LEDs for non-
reflecting LCD displays. The SP7680 automatically detects 1x or 1.5x operation for optimal efficiency.
TYPICAL APPLICATION CIRCUIT
MAIN
SUB
AUX
V
OUT
V
IN
C1-
C1+
DESCRIPTION
VIN
2.2碌F
SDA
SCL
VIN
SP7680
C1
C2
VOUT
1碌F
0.47碌F
0.47碌F
June 21-07 revH
SP7680: Complete Backlight Solution
錚?/div>
2007 Sipex Corporation
Page 1

SP7680EB 產(chǎn)品屬性

  • Exar

  • LED 照明開發(fā)工具

  • SP7680

  • Backlight White LEDs

  • Evaluation Boards

  • 2.7 V to 5.5 V

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