MP24183
1A, 55V, Programmable Frequency
White LED Driver
The Future of Analog IC Technology
FEATURES
DESCRIPTION
1A Maximum Output Current
Unique Step-up/down Operation (Buck-
Boost Mode)
The MP24183 is a 55V, 1A, white LED driver
suitable for either step-down or inverting
step-up/down applications. It achieves 1A peak
output current over a wide input supply range
with excellent load and line regulation. Current
mode operation provides fast transient
response and eases loop stabilization. Fault
condition protection includes thermal shutdown,
cycle-by-cycle peak current limiting, input over
voltage protection, open strings protection and
output short circuit protection.
The MP24183 incorporates both DC and PWM
dimming onto 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.
Wide 4.5V to 55V Operating Input Range for
Step-Down Applications (Buck Mode)
0.28Ω Internal Power MOSFET Switch
Adjustable Switching Frequency
Analog and PWM Dimming
0.198V Reference Voltage
5μA Shutdown Mode
No minimum LED required
Stable with Low ESR Output Ceramic
Capacitors
Cycle-by-Cycle Over Current Protection
Thermal Shutdown Protection
Open Strings Protection
Input Over Voltage Protection
Output Short Circuit Protection
Available in 10-Pin 3x3 QFN Package
The MP24183 requires a minimum number of
readily available standard external components
and is available in a 10-pin 3mm x 3mm QFN
package.
APPLICATIONS
General LED Illuminations
LCD Backlight Panels
Handheld Computers
Automotive Internal Lighting
Portable Multimedia Players
Portable GPS Devices
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
R4
VIN
VDD OVP
BST
R3
L1
4.7
C3
100nF
4.5V<VIN<55V
C1
10
MP24183
SW
C2
2.2
D1
B360A
EN/DIM
INGND
ON
OFF
FB
DC or PWM Input
VSS COMP RSET
R1
C5
1nF
C4
1nF
R2
MP24183 Rev. 1.0
8/28/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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