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XRP7620EVB Datasheet(PDF) 2 Page - Exar Corporation

Part No. XRP7620EVB
Description  4-Channel Adjustable Current I2C Controlled LED Driver
Download  11 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRP7620EVB Datasheet(HTML) 2 Page - Exar Corporation

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© 2009 Exar Corporation
2/11
Rev. 1.0.0
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
VIN, SDA, SCL, LEDx .................................. -0.3V to 6.0V
Storage Temperature .............................. -65°C to 150°C
Power Dissipation ................... Internally Limited (Note 1)
Lead Temperature (Soldering, 10 sec) ................... 300°C
ESD Rating (Human Body Model) ............................. 2kV
OPERATING RATINGS
Input Voltage Range VIN...............................2.7V to 5.5V
Junction Temperature Range ....................-40°C to 100°C
Thermal Resistance θJA ...................................... 59°C/W
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Junction Temperature of TJ = 25°C only; limits applying over the full
Operating Junction Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test,
design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for
reference purposes only. Unless otherwise indicated, VIN = 2.7V to 4.6V, CIN = 1µF, TA= –40°C to 85°C, TJ = –40°C to
100°C.
Parameter
Min.
Typ.
Max.
Units
Conditions
Operating Input Voltage Range
2.7
5.5
V
Operating Input Current
DAC=000000
30
50
µA
ILEDX=0, VIN=4.2V
Operating Input Current
450
600
µA
ILED1=ILED2=ILED3=ILED4=10mA, VIN=4.2V
-0.3
0.3
mA
VLED = 0.2V to 2.7V
ILEDX ≤ 6mA
-5
5
%
LED Current accuracy
(includes Line Regulation)
-8
8
%
VLED = 0.2V to 2.7V
ILEDX > 6mA
LED Current Matching
-3
3
%
For same DAC setting
VLED = 0.2V to 2.7V, Note 2
Line Regulation
1
%/V
Measured as ΔIOUT /IOUT_AVG /ΔV
VLED = 0.2V to 2.7V, Note 3
Current DAC Resolution
6
Bit
Current for DAC=000000
2
µA
Applies to all LEDs
Current for DAC=000001
0.35
0.50
0.65
mA
Applies to all LEDs
Maximum LED Current
DAC=111111
30.50
31.75
33.00
mA
Applies to all LEDs
2
µs
For changes between any DAC code
000001 and higher. Current must change
within this time after the last bit of LED
data. VIN=2.7 to 5.5V
Maximum Current Change
Settling Time
60
150
µs
Applies to changes between DAC code
000000 and higher or change from 0 to 1
for STATUS bits B5-B2 (channel enable).
Current must change within this time
after the last bit of LED data. VIN=2.7 to
5.5V
Current Source Dropout Voltage
0.1
0.15
V
ILED=20mA;
The voltage where LED current decreases
3% from nominal value at VLED = 1V.
VIN=2.7 to 5.5V
Shutdown Supply Current
0.01
1
µA
VIN=4.2V
Shutdown Supply Current
5
µA
VIN=4.2V, TA=85°C
Thermal Shutdown Die
Temperature
125
150
175
°C
Regulator turns off


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