Datasheet
LTM8040
15
8040fa
APPLICATION INFORMATION
Table 2. Recommended Confi guration
V
IN
RANGE C
IN
LED STRING
VOLTAGE
(LEDA)
LED STRING
CURRENT
(LEDA) R
ADJ
R
T(OPTIMAL)
f
OPTIMAL
R
T(MIN)
f
MAX
BIAS CONNECTION
4.5V to 36V 1μF 0805 50V 2.5V to 4V 35mA 154 Open 0.50M Open 0.50M 2.6V to 25V Source
6.5V to 36V 1μF 0805 50V 4V to 6V 35mA 154 Open 0.50M Open 0.50M LPWR
9.5V to 36V 1μF 0805 50V 6V to 9V 35mA 154 Open 0.50M Open 0.50M LPWR
12.5V to 36V 1μF 0805 50V 8V to 12V 35mA 154 Open 0.50M Open 0.50M LPWR
4.5V to 36V 1μF 0805 50V 2.5V to 4V 100mA 453 Open 0.50M Open 0.50M 2.6V to 25V Source
6.5V to 36V 1μF 0805 50V 4V to 6V 100mA 453 Open 0.50M 165k 0.70M LPWR
9.5V to 36V 1μF 0805 50V 6V to 9V 100mA 453 487k 0.57M 137k 0.75M LPWR
12.5V to 36V 1μF 0805 50V 8V to 12V 100mA 453 487k 0.57M 88.7k 0.85M LPWR
4.8V to 36V 1μF 0805 50V 2.5V to 4V 350mA 2.87k Open 0.50M Open 0.50M 2.6V to 25V Source
7V to 36V 1μF 0805 50V 4V to 6V 350mA 2.87k Open 0.50M 165k 0.70M LPWR
10.5V to 36V 1μF 0805 50V 6V to 9V 350mA 2.87k 137k 0.75M 54.9k 1.0M LPWR
13.8V to 36V 1μF 0805 50V 8V to 12V 350mA 2.87k 75k 0.90M 29.4k 1.37M LPWR
4.8V to 36V 1μF 0805 50V 2.5V to 4V 500mA 5.11k Open 0.50M Open 0.50M 2.6V to 25V Source
7V to 36V 1μF 0805 50V 4V to 6V 500mA 5.11k Open 0.50M 165k 0.70M LPWR
10.5V to 36V 1μF 0805 50V 6V to 9V 500mA 5.11k 137k 0.75M 54.9k 1.0M LPWR
14.3V to 36V 1μF 0805 50V 8V to 12V 500mA 5.11k 75k 0.90M 29.4k 1.37M LPWR
5V to 36V 1μF 0805 50V 2.5V to 4V 700mA 11.8k Open 0.50M Open 0.50M 2.6V to 25V Source
7.7V to 36V 1μF 0805 50V 4V to 6V 700mA 11.8k 487k 0.57M 165k 0.70M LPWR
11V to 36V 1μF 0805 50V 6V to 9V 700mA 11.8k 165k 0.70M 54.9k 1.0M LPWR
14.8V to 36V 1μF 0805 50V 8V to 12V 700mA 11.8k 75k 0.90M 29.4k 1.37M LPWR
5.5V to 36V 1μF 0805 50V 2.5V to 4V 1A Open Open 0.50M Open 0.50M 2.6V to 25V Source
8V to 36V 1μF 0805 50V 4V to 6V 1A Open Open 0.50M 137k 0.75M LPWR
11.5V to 36V 1μF 0805 50V 6V to 9V 1A Open 215k 0.65M 54.9k 1.0M LPWR
15.5V to 36V 1μF 0805 50V 8V to 12V 1A Open 137k 0.75M 29.4k 1.37M LPWR
Note: Input bulk capacitor assumed.
Do not allow V
IN
+ BIAS to exceed the Absolute Maximum Rating of 51V.