Datasheet
Table Of Contents
- Features
- Typical Applications
- 1. Introduction
- 2. Ordering Information
- 3. Application Circuit
- 4. Absolute Maximum Ratings
- 5. Electrical Characteristics
- 6. Block Diagram
- 7. Pinout and Pin Description
- 8. Typical Application Circuit
- 9. Detailed Description
- 10. Fault Conditions
- 11. Applications Information
- 12. Control Registers
- 13. Detailed Register Descriptions
- 13.1 RAM (0x00 through 0x1F)
- 13.2 Main String Reference Voltage register (MREF, 0x20)
- 13.3 Color-Adjust String Reference Voltage register (CAREF, 0x21)
- 13.4 Fault Disable register (FAULT, 0x22)
- 13.5 Fault Status register (FAULTSTAT, 0x23), Read Only
- 13.6 Sleep register (SLEEP, 0x24)
- 13.7 Main String Duty Cycle register, High Byte (MDUTYHIGH, 0x34)
- 13.8 Main String Duty Cycle register, Low Byte (MDUTYLOW, 0x35)
- 13.9 Color Adjust String Duty Cycle register, High Byte (CADUTYHIGH, 0x36)
- 13.10 Color Adjust String Duty Cycle register, Low Byte (CADUTYLOW, 0x37)
- 13.11 Efficiency Optimizer Control Register (EOCTRL, 0x40)
- 13.12 Registers 0x60 and 0x61, EEPROM Access
- 14. I²C Serial Interface
- 15. Packaging Information
- 16. Datasheet Revision History
- Table of Contents
14
MSL2023/2024 [DATASHEET]
42063A–LED–02/2013
7. Pinout and Pin Description
7.1 Pinout – MSL2023 and MSL2024
7.2 Pin Descriptions
Name
Pin
DescriptionMSL2023 MSL2024
FBO 1 1
Feedback Output
Feedback output from efficiency optimizer. Connect FBO to the LED power supply regulation
feedback node to control V
LED
. When unused connect FBO to VCC.
EN 2 2
Enable Input (Active High)
Drive EN high to turn on the MSL2023/24, drive EN low to turn it off. For automatic start-up connect
EN to AVIN. Taking EN high initiates a turn-on sequence. See “Turn-On Sequence” on page 19 for
details.
CGND 3, 8, 12 12
Connect to Ground. Connect CGND to AGND
PWM1 – 3
PWM1 Dimming Input
Drive PWM1 with a pulse-width modulated signal to control LED brightness of the main string. See
“PWM and LED Brightness” on page 24 for details.
SCL 4 4
Serial Clock Input
SCL is the I²C serial interface clock input. See “I²C Serial Interface ” on page 30 for details.
SDA 5 5
Serial Data Input/Output
SDA is the I²C serial interface data I/O. See “I²C Serial Interface ” on page 30 details.
FLTB 6 6
Fault Output (Open Drain, Active Low)
FLTB sinks current to AGND when a fault condition exists. Toggle EN low then high to clear FLTB, or
clear faults through the serial interface (see “Fault Status register (FAULTSTAT, 0x23), Read Only” on
page 28). Use the serial interface to access fault information and to enable/disable fault response.
1
2
3
4
5
6
18
17
16
15
14
13
7 8 9 10 11 12
24 23 22 21 20 19
FBO
EN
CGND
SCL
SDA
FLTB
S
NC
PVIN
DRV
PGND
CS
VDD
AGND
VCC
AVIN
D
G
NC
CGND
REXT
TOFF
DNC
CGND
MSL2023
(TOP VIEW)
1
2
3
4
5
6
18
17
16
15
14
13
7 8 9 10 11 12
24 23 22 21 20 19
FBO
EN
PWM1
SCL
SDA
FLTB
S
NC
PVIN
DRV
PGND
CS
VDD
AGND
VCC
AVIN
D
G
NC
PWM2
REXT
TOFF
DNC
CGND
MSL2024
(TOP VIEW)