XRP7620 Datasheet, PDF (2/11 Pages) Exar Corporation – 4-Channel Adjustable Current I2C Controlled LED Driver

XRP7620
4-Channel Adjustable Current I2C Controlled LED Driver
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.
V_IN, 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 V_IN...............................2.7V to 5.5V
Junction Temperature Range ....................-40°C to 100°C
Thermal Resistance θ_JA ...................................... 59°C/W
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Junction Temperature of T_J = 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 T_J = 25°C, and are provided for
reference purposes only. Unless otherwise indicated, V_IN = 2.7V to 4.6V, C_IN = 1µF, T_A= –40°C to 85°C, T_J = –40°C to
100°C.
Parameter
Operating Input Voltage Range
Operating Input Current
DAC=000000
Operating Input Current
LED Current accuracy
(includes Line Regulation)
LED Current Matching
Line Regulation
Current DAC Resolution
Current for DAC=000000
Current for DAC=000001
Maximum LED Current
DAC=111111
Min.
2.7
-0.3
-5
-8
-3
0.35
30.50
Maximum Current Change
Settling Time
Current Source Dropout Voltage
Shutdown Supply Current
Shutdown Supply Current
Thermal Shutdown Die
Temperature
125
Typ.
30
450
6
0.50
31.75
60
0.1
0.01
150
Max.
5.5
50
600
0.3
5
8
3
1
2
0.65
33.00
2
150
0.15
1
5
175
Units
V
µA
µA
mA
%
%
%
%/V
Bit
µA
mA
mA
µs
µs
V
µA
µA
°C
Conditions
•
• I_LEDX=0, V_IN=4.2V
• I_LED1=I_LED2=I_LED3=I_LED4=10mA, V_IN=4.2V
• ^{VLED = 0.2V to 2.7V}
I_LEDX ≤ 6mA
V_LED = 0.2V to 2.7V
• ^ILEDX ^{> 6mA}
For same DAC setting
•
V_LED = 0.2V to 2.7V, Note 2
• ^{Measured as ΔIOUT /IOUT_AVG /ΔV}
V_LED = 0.2V to 2.7V, Note 3
• Applies to all LEDs
Applies to all LEDs
Applies to all LEDs
For changes between any DAC code
•
000001 and higher. Current must change
within this time after the last bit of LED
data. V_IN=2.7 to 5.5V
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. V_IN=2.7 to
5.5V
I_LED=20mA;
•
The voltage where LED current decreases
3% from nominal value at V_LED = 1V.
V_IN=2.7 to 5.5V
V_IN=4.2V
V_IN=4.2V, T_A=85°C
Regulator turns off
© 2009 Exar Corporation
2/11
Rev. 1.0.0