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CAT3649
Figure 1. Typical Application Circuit
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, LEDx, C1 ± , C2 ± , PWM, ADIM, CPWM voltage
VOUT
Storage Temperature Range
Junction Temperature Range
Rating
GND ? 0.3 to 6
GND ? 0.3 to 7
? 65 to +160
? 40 to +150
Unit
V
V
_ C
_ C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 2. RECOMMENDED OPERATING CONDITIONS
VIN
Ambient Temperature Range
LED pin Current range
Parameter
Rating
2.4 to 5.5
? 40 to +85
0 to 25
Unit
V
_ C
mA
Table 3. RECOMMENDED ADIM, PWM TIMING (For 2.4 V ≤ V IN ≤ 5.5 V, over full ambient temperature range ? 40 ° C to +85 ° C.)
Parameter
ADIM program low time
Symbol
T LO
Conditions
Min
0.2
Typ
Max
2000
Units
m s
ADIM program high time
T HI
0.2
m s
ADIM to LED current settling time
T LED
No CPWM capacitor
40
m s
ADIM or PWM low time to shutdown
PWM to VOUT delay time
PWM maximum frequency
PWM minimum duty cycle
T PWRDWN
T PWM VOUT
F PWM MAX
DC PWM MIN
100 kHz PWM frequency
12.5
20
40
200
1
30
ms
m s
kHz
%
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