EV3388EY-00A MPS | Alldatasheet
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Technical content
EV3388EY-00A Rev.1.0 www.MonolithicPower.com 1 11/3/2009 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. The Future of Analog IC Technology
DESCRIPTION
The EV3388EY-00A is an evaluation board for the MP3388EY, a step-up converter designed for large liquid-crystal displays that employ an array of LEDs as the light source. It can drive up to 8 strings in parallel and 10 LEDs per string. The MP3388 uses internal switch current mode, fixed frequency architecture and includes current ballast in each string terminal, which achieves ±3% current regulation accuracy between strings. Low feedback voltage at each LED string help reduce power loss and improve efficiency. The MP3388 has multiple features to protect the converter from fault co nditions, including under- voltage lockout, current limiting, over voltage, short LED, open LED and thermal shut-down protection. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Input Voltage VIN 5 – 25 V LEDs # 8 string parallel and
10 LEDs each string
LED Current I LED 20/string mA
FEATURES
- 5V to 25V Input Voltage Range
- Up to 89% Efficiency
- Programmable Over Voltage Protection
- Drives up to 8 Strings Parallel and 10 LEDs in Series.
- 3% Current Regulation Accuracy Between Strings
- Selectable Switching Frequency: 1.25MHz and 625kHz
- Open and Short LED Load Protection
- Thermal Shutdown
APPLICATIONS
- Notebook PC
- Small LCD TV
- Handy Terminals Display
- Automotive Systems and Tablet Computer “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV3388EY-00A EVALUATION BOARD (L x W x H) 6.0cm x 3.2cm x 1.0cm Board Number MPS IC Number EV3388EY-00A MP3388EY
EV3388EY-00A ― 8 STRING WHITE LED DRIVER EV3388EY-00A Rev.1.0 www.MonolithicPower.com 2 11/3/2009 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC
EV3388EY-00A ― 8 STRING WHITE LED DRIVER EV3388EY-00A Rev.1.0 www.MonolithicPower.com 3 11/3/2009 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. EV3388EY-00A BILL OF MATERIALS Qty Ref Value Description Package Manufacturer Part Number 2 C1,C2 4.7µF Ceramic Capacitor, 50V, X7R 1210 Murata GRM32ER71H475KA8 1 C3 2.2uF Ceramic Capacitor, 50V, X7R 1210 Murata GRM32ER72A225KA3
1 C4 NC 1210
1 C5 68nF Ceramic Capacitor,
50V, X7R 0603 Murata GRM188R71H683KA0
3 C6, C8, C9 NC 0603
1 C7 0.47uF Ceramic Capacitor, 16V, X5R 0603 Murata GRM21BR61C474KA8
1 C10 100pF Ceramic Capacitor,
50V, X7R 0603 Murata GRM188R71H101KA9
1 D1 Diode Schottky, 60V,
1A SMA Diodes Inc DFLS160-F
1 F1 0 Ω Resistor, 5% 1206 Yageo RC1206JR-070RL
10µH Inductor,2.47A SMD Cooper DR73-100 1 L1 10µH Inductor,2.5A SMD TDK SLF10145T-100M2R5- H
1 M1 P- channel MOSFET SO8 AM4499P
1 R1 324k Ω Resistor, 1% 0603 Yageo RC0603FR-07324KL
2 R2, R5 NC 0603
1 R3 10k Ω Resistor, 1% 0603 Yageo RC0603FR-0710KL
4 R4, R6, R10,
R11 20kΩ Resistor, 5% 0603 Yageo RC0603JR-0720KL 1 R7 60.4k Ω Resistor, 1% 0603 Yageo RC0603FR-0760K4L