lx1972a Microsemi Corporation, lx1972a Datasheet - Page 7

• Manufacturer Part Number: lx1972a
• Description: Ambient Light Detector
• Manufacturer: Microsemi Corporation

Copyright © 2005
Rev. 1.0, 2006-09-18
3.3V
TM
LX1972A
V
DD
SHDN
GND
3.3V
VIN
100K
V
SS
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
PWM Dimming Input
178K
MMBT2907
Figure 7 – Typical Application with Microsemi’s LX1995 LED Driver IC
Figure 8 – Typical Application with Microsemi’s LX1994 LED driver IC
V
LX1972A
V
100K
IN
SS
= 2.0V to 5.5V
R1
22µF
4.7µF
C1
R7
24.9K
15K
V
A P P L I C A T I O N C I R C U I T S
DD
Integrated Products Group
4.99K
®
Microsemi
1µF
R8
60.4K
LX1995
IN
SHDN
0.1µF
L1 10µH
MMBT2907
C4
GND
LX1994
VIN
S/P
BRT
LS
GND
SW
FB
22µH
Ambient Light Detector
10µF
P
10K
C3
CMP
R10
49.9K
DRV
SRC
OVP
R4
RODUCTION
FB
UPS5817
0.1µF
D1
FDN337
1µF
5.76K
C2
UPS5819
R5
D
ATA
1M
R6
15
41.2K
S
HEET
1µF
LX1972A
15
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