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MP24830
4.5V – 90V, Programmable Frequency
White LED Driver
MP24830 Rev. 1.02 www.MonolithicPower.com 1
4/29/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP24830 is a 90V white LED driver
suitable for either step-down or inverting
step-up/down applications. It supports a wide
input range with excellent load and line
regulation. Its programmable current limit
provides customized applications with a wide
power range. Current mode operation provides
a fast transient response and eases loop
stabilization. Fault condition protection includes
thermal shutdown, cycle-by-cycle peak-current
limiting, open-string protection, and output
short-circuit protection.
The MP24830 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 MP24830 requires a minimal number of
readily-available external components. It is
available in 14-pin SOIC and QFN packages.
FEATURES
• Programmable Maximum Output Current
• Unique Step-Up/Down Operation (Buck-
Boost Mode)
• Wide 4.5V-to-90V Operating Input Range
for Step-Down Applications (Buck Mode)
• Adjustable Switching Frequency
• Analog and PWM Dimming
• 0.2V Reference Voltage
• 10μA Shutdown Mode
• No Minimum LED Quantity Required
• Stable with Low ESR Output Ceramic
Capacitors
• Cycle-by-Cycle Over-Current Protection
• Thermal Shutdown Protection
• Open-String Protection
• Output Short-Circuit Protection
• Available in 14-Pin SOIC and QFN
Packages
APPLICATIONS
• General LED Illumination
• Automotive LED Lighting
• LCD Backlight
A
ll MPS parts are lead-free, halogen free, and adhere to the RoHS directive. Fo
r
MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
VDD
3
5
6
4
12
7
9
10
11
8
14
1
2
13
DIM
EN
INGND
VSS
RSET COMP
OVP
FB
DIMO
SW
MP24830
DR
U1
CS
BST
C1
C3
100pF
R6
100k
C4
4.3nF
R3
4.7k
C5
1nF
D1
R10
C9
22pF
R9
499k
Rcs
Q1
R7
Q2
Si4100DY
D2
C2
DIM
EN
INGND
LED-
LED+
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