CAT3604 Datasheet, PDF (8/11 Pages) Catalyst Semiconductor – 4-Channel Regulated Charge Pump White LED Driver

VIN
50mV/
div
Input
Current
10mA/
div
VOUT
50mV/
div
CAT3604
TYPICAL CHARACTERISTICS
(V_IN = 3.6 V, EN = V_IN, C_IN = C_OUT = 1 mF, R_SET = 24 kW, T_AMB = 25°C, unless otherwise specified.)
AC coupled
AC coupled
AC coupled
VIN
50mV/div
AC coupled
Input
Current
10mA/div
VOUT
50mV/div
AC coupled
AC coupled
500 nsec/div
Figure 15. Switching Waveforms in 1.5x Mode
500 nsec/div
Figure 16. Operating Waveforms in 1x Mode
EN
2V/div
Input
Current
100mA/
div
EN
2V/div
Input
Current
100mA/div
VOUT
2V/div
100
500 msec/div
Figure 17. Power Up 4 LEDs at 15 mA,
Vin = 3 V (1.5x Mode)
VOUT
2V/div
Vin
3.6V to 4.9V
1V/div
500 msec/div
Figure 18. Power Up 4 LEDs at 15 mA,
Vin = 3.6 V (1x Mode)
10
LED Current
5mA/div
VOUT
2V/div
AC coupled
1
10
100
1000
RSET (kW)
200 msec/div
Figure 19. LED Current vs. R_SET
Figure 20. Line Transient Response
in 1x Mode
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