LTM8040_15 Datasheet, PDF (15/20 Pages) Linear Technology – 36V, 1A Module LED Driver and Current Source

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