LTC3783 Datasheet, PDF (5/24 Pages) Linear Technology – PWM LED Driver and Boost, Flyback and SEPIC Controller

LTC3783
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C unless otherwise specified
V_REF vs Temperature
1.25
V_REF Line Regulation
1.235
V_REF Load Regulation
1.235
1.20
1.233
1.233
1.15
1.231
1.10
1.229
1.05
1.227
1.231
V_IN = 12V
1.229
V_IN = 2.5V
1.227
1.00
–50
0
50
100
TEMPERATURE (°C)
150
3783 G01
I_Q vs Temperature (PWMIN Low)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–75 –25 25
75
125 175
TEMPERATURE (°C)
3783 G04
RUN Thresholds vs V_IN
1.6
1.5
RUN HIGH
1.4
1.3
RUN LOW
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0
10
20
30
V_IN (V)
40
3783 G07
1.225
0
10
20
30
40
V_IN (V)
3783 G02
I_Q vs V_IN (PWMIN Low)
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
0
0
10
20
30
V_IN (V)
40
50
3783 G05
RUN Thresholds vs Temperature
1.40
1.38
RUN HIGH
1.36
1.34
1.32
1.30
1.28
1.26
RUN LOW
1.24
1.22
–50
0
50
100
TEMPERATURE (°C)
150
3783 G08
1.225
0
1
2
3
4
5
I_REF (mA)
3783 G03
Dynamic I_Q vs Frequency
30
C_L = 3300pF
I_Q(TOT) = 1.3mA + Q_G • f
25
20
15
10
5
0
0
0.5
1
FREQUENCY (MHz)
R_T vs Frequency
1000
1.5
3783 G06
100
10
1
1
10
100
1000 10000
FREQUENCY (kHz)
3783 G09
3783f
5