MP24183DQ-LF-Z Datasheet, PDF (1/12 Pages) MPS Industries, Inc. – 1A, 55V, Programmable Frequency White LED Driver

The Future of Analog IC Technology
DESCRIPTION
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.
The MP24183 requires a minimum number of
readily available standard external components
and is available in a 10-pin 3mm x 3mm QFN
package.
MP24183
1A, 55V, Programmable Frequency
White LED Driver
FEATURES
 1A Maximum Output Current
 Unique Step-up/down Operation (Buck-
Boost Mode)
 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
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
VIN
4.5V<VIN<55V
C1
10
OFF ON
DC or PWM Input
VDD OVP
BST
MP24183
SW
EN/DIM
INGND
FB
VSS COMP RSET
C3
L1
100nF 4.7
D1
B360A
C4
1nF
R2
C5
1nF
R4
R3
C2
2.2
R1
MP24183 Rev. 1.0
www.MonolithicPower.com
1
8/28/2008
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