Linear Technology DC1497A Demo Manual page 2

DEMO MANUAL DC1497A
perForMAnce sUMMArY
SYMBOL PARAMETER
V * Input Supply
IN
V LED String Voltage
LED
V Maximum Output Voltage
OUT(MAX)
I Output Current
OUT
DIM PWM Dimming Ratio
FSW Switching Frequency
EFE Efficiency
*Actual V range should be determined by the load. For 9 white LEDs per channel, use a 48V input for evaluation.
IN
2
(T = 25°C)
A
CONDITIONS
R23 = R24 = R25 = 20k
PWM Dimming Frquency = 100Hz
R22 = 33.2k
V = 48V, V = 29V, I = 100mA, BIAS = 5V, No Dimming
IN OUT OUT
MIN TYP MAX UNITS
6 55
28 34
38
98 100 102
10,000:1
0.9 1 1.1
87
dc1497af
V
V
V
mA
MHz
%