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MPS

MP24183DQ Datasheet Preview

MP24183DQ Datasheet

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
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)
0.28Internal 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
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.




MPS

MP24183DQ Datasheet Preview

MP24183DQ Datasheet

White LED Driver

No Preview Available !

MP24183 – 1A, 55V, PROGRAMABLE FREQUENCY WHITE LED DRIVER
Part Number*
MP24183DQ
ORDERING INFORMATION
Package
3x3 QFN10
Top Marking
9M
Free Air Temperature (TA)
-40C to +85C
* For Tape & Reel, add suffix –Z (e.g. MP24183DQ–Z).
For RoHS compliant packaging, add suffix –LF (e.g. MP24183DQ–LF–Z)
PACKAGE REFERENCE
TOP VIEW
VDD 1
VSS 2
OVP 3
FB 4
COMP 5
10 SW
9 BST
8 INGND
7 EN/DIM
6 RSET
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VDD – VSS............................. 60V
VSW – VSS .............................. -0.3V to VIN + 0.3V
VBST ...................................................... VSW + 6V
VOVP – VSS .......................................-0.3V to +6V
VEN – VINGND.....................................-0.3V to +6V
VDIM – VINGND....................................-0.3V to +6V
VINGND – VSS.....................................-0.3V to 60V
Continuous Power Dissipation (TA = +25°C) (2)
………………………………………………....2.5W
Junction Temperature ...............................150C
Lead Temperature ....................................260C
Storage Temperature............... -65C to +150C
Recommended Operating Conditions (3)
Supply Voltage VDD – VSS.................4.5V to 55V
Operating Junct. Temp (TJ)..... -40C to +125C
Thermal Resistance (4) θJA θJC
3x3 QFN10..............................50 ...... 12 ... C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ (MAX), the junction-to-
ambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD (MAX) = (TJ
(MAX)-TA)/θJA. Exceeding the maximum allowable power
dissipation will cause excessive die temperature, and the
regulator will go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device function is not guaranteed outside of the
recommended operating conditions.
4) Measured on JESD51-7, 4-layer PCB.
MP24183 Rev. 1.0
www.MonolithicPower.com
2
8/28/2008
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.


Part Number MP24183DQ
Description White LED Driver
Maker MPS
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