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LT3496
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V IN = 5V, V SHDN = 5V, CAP1, CAP2, CAP3 = 5V, PWM1, PWM2, PWM3 = 5V,
f ADJ = 0.5V, CTRL1, CTRL2, CTRL3 = 1.5V, OVP1, OVP2, OVP3 = 0V, unless otherwise noted.
PARAMETER
V IN Operation Voltage
V IN Undervoltage Lockout
CONDITIONS
(Note 4)
MIN
3
TYP
2.1
MAX
30
2.4
UNITS
V
V
Full-Scale LED Current Sense Voltage
(V CAP1-LED1 , V CAP2-LED2 , V CAP3-LED3 )
One-Tenth Scale LED Current Sense Voltage
(V CAP1-LED1 , V CAP2-LED2 , V CAP3-LED3 )
CAP1, CAP2, CAP3 Operating Voltage
V REF Output Voltage
CAP1, CAP2, CAP3 = 24V
CTRL1, CTRL2, CTRL3 = 100mV, CAP1, CAP2, CAP3 = 24V
H-Grade
E-Grade, I-Grade
0V ≤ V CAP1-LED1 ≤ 104mV
0V ≤ V CAP2-LED2 ≤ 104mV
0V ≤ V CAP3-LED3 ≤ 104mV
I REF = 200μA, Current Out of Pin
l
l
l
l
98
97
7.5
7.5
2.5
1.96
100
10
10
2
103
104
13.5
12.5
45
2.04
mV
mV
mV
mV
V
V
V REF Line Regulation
3V ≤ V IN ≤ 40V, I REF = 10μA
0.03
%/V
Quiescent Current in Shutdown
Quiescent Current Idle
Quiescent Current Active (Not Switching)
SHDN = 0V
PWM1, PWM2, PWM3 = 0V
0.1
6
11
10
7.5
14
μA
mA
mA
Switching Frequency
f ADJ = 1.5V
f ADJ = 0.5V
f ADJ = 0.1V
1900
2100
1300
330
2300
kHz
kHz
kHz
Maximum Duty Cycle
f ADJ = 1.5V (2.1MHz)
f ADJ = 0.5V (1.3MHz)
f ADJ = 0.1V (330kHz)
l
70
78
87
97
%
%
%
CTRL1, CTRL2, CTRL3 Input Bias Current
f ADJ Input Bias Current
OVP1, OVP2, OVP3 Input Bias Current
OVP1, OVP2, OVP3 Threshold
Current Out of Pin, CTRL1, CTRL2, CTRL3 = 0.1V
Current Out of Pin, f ADJ = 0.1V
Current Out of Pin, OVP1, OVP2, OVP3 = 0.1V
0.95
20
20
10
1
100
100
100
1.05
nA
nA
nA
V
VC1, VC2, VC3 Idle Input Bias Current
VC1, VC2, VC3 Output Impedance
EAMP g m ( Δ I VC / Δ V CAP-LED )
SW1, SW2, SW3 Current Limit
PWM1, PWM2, PWM3 = 0V
CAP1, CAP2, CAP3 = 24V
CAP1, CAP2, CAP3 = 24V
(Note 3)
–20
750
0
10
200
1000
20
1250
nA
M?
μS
mA
SW1, SW2, SW3 V CESAT
SW1, SW2, SW3 Leakage Current
I SW = 500mA (Note 3)
SHDN = 0V, SW = 5V
260
2
mV
μA
CAP1, CAP2, CAP3 Input Bias Current
CAP1, CAP2, CAP3, LED1, LED2, LED3 Idle Input
Bias Current
CAP1, CAP2, CAP3, LED1, LED2, LED3 Input Bias
Current in Shutdown
PWM1, PWM2, PWM3 = 0V
SHDN = 0V
180
250
1
1
μA
μA
μA
3496ff
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