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MP24183 Datasheet, PDF (1/12 Pages) Monolithic Power Systems – 1A, 55V, Programmable Frequency White LED Driver | |||
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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
ï· 1A Maximum Output Current
ï· Unique Step-up/down Operation (Buck-
Boost Mode)
ï· Wide 4.5V to 55V Operating Input Range for
Step-Down Applications (Buck Mode)
ï· 0.28⦠Internal Power MOSFET Switch
ï· Adjustable Switching Frequency
ï· Analog and PWM Dimming
ï· 0.198V Reference Voltage
ï· 5μA Shutdown Mode
ï· No minimum LED required
ï· Stable with Low ESR Output Ceramic
Capacitors
ï· Cycle-by-Cycle Over Current Protection
ï· Thermal Shutdown Protection
ï· Open Strings Protection
ï· Input Over Voltage Protection
ï· Output Short Circuit Protection
ï· Available in 10-Pin 3x3 QFN Package
APPLICATIONS
ï· General LED Illuminations
ï· LCD Backlight Panels
ï· Handheld Computers
ï· Automotive Internal Lighting
ï· Portable Multimedia Players
ï· Portable GPS Devices
âMPSâ and âThe Future of Analog IC Technologyâ 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
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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