Datasheet

Data Sheet ADP1621
Rev. B | Page 29 of 32
ADP1621
IN
CS
FB
AGND
PGND
SDSN
COMP
FREQ
GND
PIN
PWM
GATE
R1
8Ω
1/4W
150mA
20
LEDS
R
B
800Ω
C1
2.2µF
25V
L1
33µH
M1
100V
C
COMP
390nF
f
OSC
= 400kHz
C1 = MURATA GRM31MR71E225K
C
OUT
= MURATA GRM31CR72A105K
L1 = COILCRAFT MSS1038-333NL
M1 = VISHAY Si4482DY
D1 = IRF 10MQ100
R
S
800Ω
C
OUT
1µF
100V
×3
R
FREQ
50kΩ
1%
V
OUT
V
IN
= 10V TO 16
V
D1
100V
C3
0.1µF
C4
0.1µF
C2
18pF
R
COMP
101kΩ
R
CS
3mΩ
06090-040
Figure 41. 20-Series LED Driver with PWM at SDSN
ADP1621
IN
CS
FB
AGND
PGND
SDSN
COMP
FREQ
GND
PIN
PWM =
0V TO 4V
GATE
R1
8Ω
1/4W
R5
18kΩ
150mA
20
LEDS
R
B
800Ω
C1
2.2µF
25V
L1
33µH
M1
100V
C5
0.1µF
6.3V
C
COMP
390nF
f
OSC
= 400kHz
C1 = MURATA GRM31MR71E225K
C
OUT
= MURATA GRM31CR72A105K
L1 = COILCRAFT MSS1038-333NL
M1 = VISHAY Si4482DY
D1 = IRF 10MQ100
R
S
800Ω
R2
10kΩ
R3
22.9kΩ
R4
10kΩ
C
OUT
1µF
100V
×3
R
FREQ
50kΩ
1%
V
OUT
V
IN
= 10V TO 16
V
D1
100V
C3
0.1µF
C4
0.1µF
C2
10pF
R
COMP
101kΩ
R
CS
3m
06090-041
Figure 42. 20-Series LED Driver with Filtered PWM