LT3599 데이터 시트보기 (PDF) - Linear Technology
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LT3599 Datasheet PDF : 26 Pages
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LT3599
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VSHDN = 5V, unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Operating Voltage
l
2.7
3.1
V
Maximum Operating Voltage
l
30
V
Reference Voltage VREF
I(VREF ) = 0µA
1.21 1.227 1.24
V
l 1.20
1.25
V
Reference Voltage Line Regulation
Maximum VREF Pin Current
VREF Load Regulation
Feedback Voltage
I(VREF ) = 0µA, 3.1V < VIN < 30V
(Note 3)
0 < I(VREF) ≤ 100µA (Max)
0.01 0.03
%/V
100
µA
1
mV
l 1.196 1.223 1.250
V
FB Pin Bias Current
(Note 3)
100
250
nA
FB Error Amp Transconductance
∆I = 5µA
200
µmhos
FB Error Amp Voltage Gain
210
V/V
Current Loop Amp Transconductance
50
µmhos
Current Loop Amp Voltage Gain
50
V/V
VC Source Current (Out of Pin)
VC Sink Current (OVP Mode)
Quiescent Current
Quiescent Current in Shutdown
LED Current
LED String Current Matching
LED1-4 = 0.4V, FB = 1V, VC = 1.5V
8
µA
LED1-4 = 0.4V, FB = 1.5V, VC = 1.5V
15
µA
VSHDN = 5V, PWM = 0V, Not Switching, VC = 0.7V
3
4.8
mA
VSHDN = 0V
0
1
µA
RISET = 13.3k
96
99
102
mA
100mA LED Current
l
±0.25 ±1.5
%
LED Open Detection Threshold (VLED–GND)
LED Short Detection Threshold (VOUT –VLED)
LED Regulation Voltage
FB > 1.25V
0.3
0.4
V
0.8
1.5
2.2
V
0.77
V
LED1-4 Leakage Current
CTRL Pin Bias Current
Switching Frequency
TSET Voltage
Maximum Switch Duty Cycle
Switch Current Limit
VLED1-4 = 45V
VCTRL = 0.8V (Note 3)
RT = 324k
RT = 53.6k
RT = 20k
RT = 324k
RT = 53.6k
RT = 20k
(Note 4)
0.1
1
µA
100
200
nA
176
198
220
kHz
0.9
1
1.1
MHz
1.82 2.06
2.3
MHz
595
mV
l 97.7 98.6
%
l 88.5
93
%
l 77
86
%
2
2.5
3
A
Switch VCESAT
Switch Leakage Current
SHDN/UVLO Pin Threshold (VSD_SHDN)
SHDN/UVLO Pin Threshold (VSD_ UVLO)
SHDN/UVLO Pin Hysteresis Current
Soft-Start Current
ISW = 0.5A
VSW = 45V, FB = 1.3V
Shutdown
Rising
SHDN = VSD_UVLO – 50mV
SHDN = VSD_UVLO + 50mV
SS = 1V (Note 3)
0.10
V
0.2
5
µA
0.3
0.7
0.95
V
1.28 1.36 1.44
V
2.5
4
5.5
µA
0
µA
11
µA
PWM Input High Threshold
1
V
PWM Input Low Threshold
0.4
V
3599ff
For more information www.linear.com/LT3599
3
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