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C-
C+
SCL
CPOUT
IN
GND
HVLED1
LVLED4
LVLED3
LVLED2
LVLED1
SDA
OVP
INT
PWM
SW
HVLED2
HWEN
LVLED5
ALS
LM3533
CIN
(2.2 uF)
COUT (1 uF, 50V)
D1 (40V Schottky)
L1 (10 uH)
RSH2
(10:)
RSH1
(10:)
VOUT
GND
VL
9
87
6
5
4
9
87
6
5
4
IH1IH2
RSDA
(4.7 k:)
RHWEN
(4.7 k:)
HL1HL2
H2J
H2I
H2H
H2G
H2F
H2E
H2D
H2C
H2B
H2A
H1J
H1I
H1H
H1G
H1F
H1E
H1D
H1B
H1C
H1A
15
1
2
16
15
1
2
16
VL
A1
A2
A3
A4
B1
B2C1C2
B4B3C3
C4
D1
D2
D3D4
E1
E2
E3
E4
VIN/VL
VIN
1.8V/VI/O/VIN
SDA
SCL
VUSB/VL
GND
CL
1.8V
RSCL
(4.7 k:)
USBL
USBR
User's Guide
SLOA172–June 2012
AN-2250 LM3533 Evaluation Kit
1 Introduction
The LM3533 Evaluation Module (LM3533EVM) is designed to fully evaluate the LM3533 Dual String
backlight driver + 5 indicator LED driver. The LM3533EVM consists of the USB Interface Board and the
LM3533 Evaluation Board. The USB Interface Board Rev 1.1 provides the hardware link between a PC
and LM3533 Evaluation Board. WOn the PC side, the LM3533.exe software communicates to the
LM3533EVM to provide an easy control over all the features of the LM3533. Both the USB Interface Board
and the LM3533 Evaluation Board plug together at the USBL and USBR connectors and are keyed so the
boards can only fit together one way.
2 LM3533 Evaluation Board Schematics
Figure 1. Boost Circuit with Dual 10 Series White LED Strings
All trademarks are the property of their respective owners.
1
SLOA172–June 2012 AN-2250 LM3533 Evaluation Kit
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