XRP7613IDBTR-F Datasheet, PDF (7/14 Pages) Exar Corporation – 1.2A 36V Step Down High Brightness LED Driver

XRP7613
1.2A 36V Step Down High Brightness LED Driver
700
ILED = 330mA
600 L = 47µH
500
400
300 1xLED
200
3xLED
100
2xLED
0
0
10
20
30
40
V_IN (V)
Fig. 16: frequency versus input voltage, ILED=330mA
500
ILED = 770mA
L = 47µH
400
3xLED
300
2xLED
200
1xLED
100
0
0
10
20
30
40
V_IN (V)
Fig. 17: frequency versus input voltage, ILED=770mA
350
ILED = 1.1A
300 L = 47µH
3xLED
250
200
2xLED
150
100 _1xLED
50
0
0
10
20
30
40
V_IN (V)
Fig. 18: frequency versus input voltage, ILED=1.1A
100
ILED = 1.1A
80
ILED = 0.347A
60
40
20
0
0
20 40 60 80 100
% Dutycycle
Fig. 19: PWM dimming at 25kHz, VIN=24V, 3xLED, L=47µH
© 2012 Exar Corporation
7/13
Rev. 1.2.0