LT3599
TYPICAL APPLICATIONS
2.1 MHz Boost, Four Strings, 80mA per String, 7 LEDs per String
PV IN
9V TO 16V
L1
4.7μH
D1
R5
6.3V
R1
C1
3.3μF
25V
V IN
R4
100k
V IN
V IN
3.1V TO 5.5V
C3
1μF
100k
V IN
SHORTLED
SW
V OUT
V O_SW
R10
1M
C2
4.7μF
50V
2
200k
R2
PWM
OPENLED
SHDN /UVLO
PWM
FB
R11
43.2k
7 LEDs/
STRING
32.4k
SYNC
CTRL
LT3599
R3
32.4k
R6
20k
R7
53.6k
RT
V REF
LED1
LED2
LED3
LED4
R8
80.6k
C1: MURATA GRM21BR71E335K
C2: MURATA GRM31CR71H475K
T SET
DISABLE4
I SET
R9
16.5k
SS
V C
GND
C4
47nF
R C
10k
C C
2.2nF
80mA PER STRING
100pF
3599 TA06a
D1: DIODES INC. DFLS240
L1: SUMIDA CDRH4D22HPNP-4R7N
PWM Dimming 3000:1
(10ms Period)
PWM
5V/DIV
I LED
TOTAL
200mA/DIV
10μs/DIV
3599 TA07
3599fe
22
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