MP24830
4.5V – 90V, Programmable Frequency
White LED Driver
The Future of Analog IC Technology
DESCRIPTION
FEATURES
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.
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
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.
Cycle-by-Cycle Over-Current Protection
Thermal Shutdown Protection
Open-String Protection
Output Short-Circuit Protection
Available in 14-Pin SOIC and QFN
Packages
The MP24830 requires a minimal number of
readily-available external components. It is
available in 14-pin SOIC and QFN packages.
APPLICATIONS
General LED Illumination
Automotive LED Lighting
LCD Backlight
All MPS products are lead-free and adhere to the RoHS directive. For 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
13
3
VDD
BST
VIN
C1
C2
Rcs
Q1
MP24830
U1
2
CS
DR
SW
5
6
DIM
EN
DIM
EN
1
14
LED+
R9
499k
4
INGND
VSS
LED-
INGND
8
11
10
OVP
DIMO
FB
Q2
Si4100DY
12
RSET COMP
9
7
D2
C4
4.3nF
C3
100pF
C5
1nF
D1
R6
100k
C9
22pF
R7
R3
R10
4.7k
MP24830 Rev. 1.0
10/30/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1