MPS EV2483DQ-00C User manual

EV2483DQ-00C
2.5A, 55V, Programmable Frequency
White LED Driver Evaluation Board
EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 1
04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP2483 is a 55V, 2.5A, white LED driver
suitable for either step-down or inverting
step-up/down applications. It achieves 2.5A
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 MP2483 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 MP2483 requires a minimum number of
readily available standard external components
and is available in 10-pin 3mm x 3mm QFN
packages.
MP2483DQ DEMO BOARDS
Board number Operating
Mode Input (V) LED# ILED (mA)
EV2483DQ-00A Buck 15~50 3 700
EV2483DQ-00B Buck-boost 12 3~5 500
EV2483DQ-00C Boost 12 6~9 500
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input Voltage VIN 12 V
LEDs # 6~9
LED Current ILED 500 mA
FEATURES
•2.5A 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)
•0.28ΩInternal 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
For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks o
f
Monolithic Power Systems, Inc.
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EV2483DQ-00C 2.5A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER
EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 2
04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
EV2483DQ-00C EVALUATION BOARD
(L x W x H) 5cm x 4.5cm x 0.7cm
Board Number MPS IC Number
EV2483DQ-00C MP2483DQ
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EV2483DQ-00C 2.5A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER
EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 3
04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
EVALUATION BOARD SCHEMATIC
EV2483DQ-00C BILL OF MATERIALS
Qty Ref Value Description Package Manufacturer Manufacturer P/N
1C1 1μFCeramic Capacitor,100V,X7R 1210 Murata GRM32ER72A105KA0
1L
2C2,
C3 2.2μFCeramic Capacitor,100V,X7R 1210 Murata GRM32ER72A225KA3 5L
2C4,
C5 1n Ceramic Capacitor,50V,X7R 0603 TDK C1608X7R1H102K
1C6 100n Ceramic Capacitor,50V,X7R 0603 TDK C1608X7R1H104K
1C7 NC 1210
1D1 B360 Diode Schottky SMA Diodes Inc. B360A
1D2 NC SMA
1L1 10μHInductor 3.7A,22mOhm SM TOKO DH124C-1010ASW-
100M
10μHInductor 3.8A, 35mOhm SM Cooper DR1040-100-R
10μHinductor 3.8A, 28mOhm SM TDK VLF10040-100M3R8
1R4 1k resistor, 1% 0603 Yageo RC0603JR-071kL
2R1,
R5 0resistor, 1% 0603 Yageo RC0603JR-070RL
2R2,
R10 10kΩresistor, 1% 0603 Yageo RC0603FR-0710kL
1R3 75kΩresistor, 1% 0603 Yageo RC0603FR-0775kL
2R6,
R8 NC 0805
1R7 400m resistor, 1% 0805 ROYALOHM 0805F400LT5E
1R9 180kΩresistor, 1% 0603 Yageo RC0603FR-07180kL
1U1 MP24
83DQ
MPS WLED Driver, 2.5A,
55V,
frequency programmable QFN3*3 MPS MP2483DQ
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EV2483DQ-00C 2.5A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER
EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 4
04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
PRINTED CIRCUIT BOARD LAYOUT
Figure 1—Top Layer
Figure 2—Bottom Layer
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EV2483DQ-00C 2.5A, 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
EV2483DQ-00C Rev.1.1 www.MonolithicPower.com 5
04/26/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
QUICK START GUIDE
1. Connect the load (6~9LEDs) to the output. The Anode of the load to “LED+_Boost” and the
Cathode of the load to “LED -”.
2. Connect the input voltage source to the input VIN and INGND. The input voltage source should be
initialed 12V.
3. Connect the EN or dimming signal to EN/Dim pin.
For PWM dimming, connect the PWM signal to EN/Dim pin, the high level should be higher than
1.4V, the low level should be lower than 0.7V.
For analog dimming, connect a DC dimming signal in range of 0.7V~1.4V to EN/Dim pin.
4. Power up the input voltage source, and then power up the EN/Dim signal, the LEDs should be
ignited.
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