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ADD5207ACPZ-RL Scheda tecnica(PDF) 5 Page - Analog Devices

Il numero della parte ADD5207ACPZ-RL
Spiegazioni elettronici  Four-String, White LED Driver for LCD Backlight Applications
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
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Data Sheet
ADD5207
Rev. A | Page 5 of 16
LED CURRENT REGULATION SPECIFICATIONS
VIN = 12 V, SHDN = high, TA = −25°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.
Table 2.
Parameter
Symbol
Test Conditions/Comments
Min
Typ
Max
Unit
CURRENT SOURCE
ISET Pin Voltage
VSET
6 V ≤ VIN ≤ 21 V
1.14
1.18
1.22
V
Adjustable LED Current1
ILED
0
25
mA
Constant Current Sink of 20 mA2
ILED20
RSET = 180 kΩ
19.4
20
20.6
mA
Minimum Headroom Voltage2
VHR20
RSET = 180 kΩ
0.66
0.9
V
Current Matching Between Strings2
RSET = 180 kΩ
−1.5
+1.5
%
LED Current Accuracy2
RSET = 180 kΩ
−3
+3
%
Current Source Leakage Current
1
µA
FPWM GENERATOR
Dimming Frequency
fPWM
6.8
8.0
9.2
kHz
LED FAULT DETECTION
Open Fault Delay1
tD_OPENFAULT
6.5
µs
1
This electrical specification is guaranteed by design.
2
Tested at TA = +25°C.


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