MP24833A
55V, 3A,
White LED Driver
MP24833A Rev. 1.01 www.MonolithicPower.com 1
1/13/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP24833A is a 55V, 3A, white LED driver
suitable for step-down, inverting step-up/step-
down, and step-up applications. The MP24833-
A achieves 3A of output current with excellent
load and line regulation over a wide input
supply range.
Current mode operation provides a fast
transient response and eases loop stabilization.
Full protection features include thermal shutdown,
cycle-by-cycle peak current limiting, open-string
protection, and output short-circuit protection
(SCP).
The MP24833A incorporates both DC and
PWM dimming into a single control pin. The
separate input reference ground pin allows for
direct enable and/or dimming control for a
positive-to-negative power conversion.
The MP24833A requires a minimal number of
readily available, standard, external
components and is available in a SOIC-8 EP
package.
FEATURES
3A Maximum Output Current
Unique Step-Up/Step-Down Operation
(Buck-Boost Mode)
Wide 4.5V-to-55V Operating Input Range
for Step-Down Applications (Buck Mode)
0.15Ω Internal Power MOSFET Switch
Fixed 210kHz Switching Frequency
Analog and PWM Dimming
0.2V Reference Voltage
6μA Shutdown Mode
No Minimum Number of LEDs Required
Stable with Low ESR Output Ceramic
Capacitors
Cycle-by-Cycle Over-Current Protection
(OCP)
Thermal Shutdown Protection
Open-String Protection
Output Short-Circuit Protection (SCP)
Available in a SOIC-8 EP Package
APPLICATIONS
General LED Illumination
LCD Backlight Panels
Notebook Computers
Automotive Internal Lighting
Portable Multimedia Players
Portable GPS Devices
ll MPS parts are lead-free, halogen-free, and adhere to the RoHS
directive. For MPS green status, please visit the MPS website unde
Quality Assurance. “MPS” and “The Future of Analog IC Technology” are
registered trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
BST
R
OVP2
OVP
SW
C
BST
VIN
EN/DIM
VDD
EN/DIM
INGND
VSS
L
D
1
C
IN
5
OFF
ON
DC or PWM Input
LEDs
6
2
FB
R
FB
R
OVP1
4
8
7
3
C
o
