CAT4002A_10 Datasheet, PDF (4/11 Pages) ON Semiconductor – Constant Current LED Driver with 32 Dimming Levels and Rset

CAT4002A, CAT4004A
TYPICAL PERFORMANCE CHARACTERISTICS
(CAT4002A, V_IN = 4 V, V_F = 3.3 V, I_OUT = 50 mA (2 LEDs at 25 mA), C_IN = 1 mF, T_AMB = 25°C unless otherwise specified.)
2.0
1.4
1.6
1.2
0.8
0.4
0
0
20
40
60
RSET (kW)
Figure 3. Quiescent Current vs. RSET Input
Voltage
1.0
0.8
0.6
0.4
0.2
0
−0.2
−0.4
−0.6
−0.8
−1.0
2.5 3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
Figure 5. LED Current Change vs. Input
Voltage
1.4
1.2
1.0
0.8
0.6
2.5 3.0
3.5
4.0
4.5
5.0 5.5
INPUT VOLTAGE (V)
Figure 4. Quiescent Current vs. Input Voltage
(Full Load)
10
8
6
4
2
0
−2
−4
−6
−8
−10
−40
0
40
80
120
TEMPERATURE (°C)
Figure 6. LED Current Change vs.
Temperature
40
1.2
1.0
25°C _{−40°C}
0.8
80°C
0.6
0.4
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Figure 7. EN/DIM High Threshold vs. Input
Voltage
30
20
10
0
1
10
100
RSET (kW)
Figure 8. LED Current vs. RSET Resistor
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