EVALUATION BOARD DATASHEET EV-151 AAT2830/31 EVAL: 800mA Total Display Solution for Portable Devices Introduction The AAT2830/31 is a total solution IC for portable display applications. Based on a tri-mode charge pump power engine, it is capable of delivering 800mA of output current with individual driving circuitries for light emitting diode (LED) backlights, photo flash, and RGB. The high conversion efficiency and high level of integration make the AAT2830/31 the optimum solution for battery life and size-critical applications. AnalogicTech’s AS2Cwire™ (Advanced Simple Serial Control™) serial digital input is used to enable, disable, and set current for all of the outputs. Each backlight channel can be programmed to 16 levels of current, from a recommended maximum of 30mA programmed by the BSET pin resistor. The AAT2830/31 can also deliver up to 600mA to drive flash LEDs over four individual channels, with excellent current matching between channels. A built-in safety timer function allows easy, one-trigger system control for photo flash applications. The RGB output can be adjusted to handle up to 60mA, and the AS2Cwire signal can drive the RGB module in up to 4096 (AAT2830) or 64 (AAT2831) color intensity combinations. This document describes the evaluation board and its accompanying user interface. In addition, a brief “Getting Started” section is included to help the user begin operating the evaluation board. A schematic of the complete circuit is shown in Figure 1. The actual board layout is also provided. For additional information, please consult the AAT2830/31 product data sheet. Getting Started To apply power to the board, connect the supply by shorting the ON prong to the other prongs in the J1 header. After shorting the ON prong, the red LED7 should illuminate which indicates that power is connected to the AAT2830/31 and microcontroller (MCU). To allow the MCU to interact with the AAT2830/31, connect/short the ON prong to the other prongs in the J2 header. The user interface is provided by five buttons. The buttons are RGB, FLASH, MOVIE, LIGHT, and DATA. The modes of operation are detailed in Table 1. Each button handles a particular function: RGB controls the red, blue, and green LEDs, FLASH engages LEDs D7-D8 in flash mode illumination for a specific time duration programmed by the C5 capacitor, MOVIE engages LEDs D7-D8 for movie mode illumination, LIGHT turns on/off the D1-D6 LEDs, DATA increments the data register value of the targeted address, LIGHT+DATA increments the target address of the AS2Cwire interface, and LIGHT+DATA+FLASH resets the MCU and turns off the AAT2830/31. When the DATA button is pressed and not released, the MCU will incrementally auto-cycle through the available values of the data register for the target address after a short delay. For a detailed device functionality description, regarding address functionality and available data register values, please consult the AAT2830/31 data sheet. EV151.2007.10.1.0 www.analogictech.com 1 EVALUATION BOARD DATASHEET EV-151 AAT2830/31 EVAL: 800mA Total Display Solution for Portable Devices Button(s) Pressed/Released Description Turns on/off red, blue, and green LEDs Button Press/Release Red LED Blue LED Green LED 1st on off off 2nd off on off 3rd off off on 4th, repeat off off off Engages flash mode operation (D7-D8 LEDs) for a progammed time duration Turns on/off D7-D8 LEDs for movie mode operation Turns on/off D1-D6 LEDs for backlight operation Increments [cycles through when not released] data of targeted address (previously pressed/released button): 1. RGB [Red LED (address 7), Green LED (address8), Blue LED (address 9)] 2. MOVIE (address 4) 3. LIGHT (address 0) 4. see “LIGHT+DATA” Increments the target address [default (address 0)]: Button Press/Release Address Decription 1st 1 Main Backlight D1-D4 2nd 2 Sub Backlight D5-D6 3rd 3 Low Backlight Current 4th, repeat 0 All Backlight D1-D6 Reset. EN/SET is held logic low RGB FLASH MOVIE LIGHT DATA LIGHT+DATA LIGHT+DATA+FLASH Table 1: User Interface Functionality. Schematic VOUT LXCL-PWF1 D1 D2 D3 D4 D5 D6 D8 DC+ VIN R9 = 280K for 30mA/channel backlight J1 R9 3 4 19 F2 21 20 F1 22 D2 F4 D1 PGND C1- CT 6 U1 AAT2830/31 F3 AGND 5 C1+ C2 1.0μF OUT LXCL-PWF1 18 17 D7 16 15 C1 14 13 1.0μF C4 4.7μF 12 C211 C2+ B 10 8 4 1 9 7 3 2 R VIN G EN/SET C5 0.1μF Optional footprints for auxiliary lighting LEDs D6 D3 2 EN BSET 24 D4 1 D5 C7 100μF 23 280K optional 100μF lab supply bypass C3 2.2μF RGB R G B Figure 1: AAT2830/31 Section Schematic of Evaluation Board. 2 www.analogictech.com EV151.2007.10.1.0 EVALUATION BOARD DATASHEET EV-151 AAT2830/31 EVAL: 800mA Total Display Solution for Portable Devices R7 EN 220 J2 R8 100K VIN VIN R1 R2 R3 R4 R5 1K 1K 1K 1K 1K U2 1 2 3 4 SW1 SW2 VDD GP5 GP4 GP3 VSS GP0 GP1 GP2 8 7 6 5 PIC12F675 C6 1μF R6 330 LED7 RED SW3 SW4 SW5 Figure 2: PIC12F675 Section Schematic of the Evaluation Board. Bill of Materials (BOM) Component U1 U2 C1, C2, C6 C3 C4 C5 C7 D1-D6 D7, D8 LED7 RGB AUX[R,G,B] R1-R5 R6 R7 R8 R9 R10 DATA, LIGHT, MOVIE, FLASH, RGB J1, J2 Part Number Description AAT2830/31 PIC12F675 0603ZD105K C1608X5R1E105K GRM188R61C105K 0603ZD225K C1608X5R1C225K GRM188R61A225K C1608X5R1A475K LMK107BJ475K 06033D104K C1608X5R1H104K GRM188R61E104K Open LW M67C LXCL-PWF1 CMD15-21SRC LPCFC-A Open CRCW08051001F CRCW0805330RF CRCW0805220RF CRCW08051003F CRCW06032803F Open 800mA Total Display Solution for Portable Devices Microcontroller 1μF, ≥10V, X5R or X7R 2.2μF, ≥10V, X5R or X7R 4.7μF, ≥10V, X5R or X7R 0.1μF, ≥16V, X5R or X7R N/A White LED Flash White LED Red LED; 1206 RGB LED (common anode) N/A 1kΩ, 1%, 1/8W, 0805 330Ω, 1%, 1/8W, 0805 220Ω, 1%, 1/8W, 0805 100kΩ, 1%, 1/8W, 0805 280kΩ, 1%, 1/10W, 0603 N/A PTS645TL50 Switch Tact, SPST, 5MM PRPN401PAEN Connecting Header, 2mm Manufacturer AnalogicTech Microchip AVX TDK Murata AVX TDK Murata TDK Taiyo Yuden AVX TDK Murata N/A Osram Lumileds CML Innovative Tech, Inc Lasemtech, Inc N/A Vishay Vishay Vishay Vishay Vishay N/A ITT Industries Sullins Electronics Table 2: Component Listing. EV151.2007.10.1.0 www.analogictech.com 3 EVALUATION BOARD DATASHEET EV-151 AAT2830/31 EVAL: 800mA Total Display Solution for Portable Devices Printed Circuit Board Figure 3: AAT2830/31 Evaluation Board Top Layer (not to scale). 4 www.analogictech.com EV151.2007.10.1.0 EVALUATION BOARD DATASHEET EV-151 AAT2830/31 EVAL: 800mA Total Display Solution for Portable Devices Figure 4: AAT2830/31 Evaluation Board Bottom Layer (not to scale). Advanced Analogic Technologies, Inc. 3230 Scott Boulevard, Santa Clara, CA 95054 Phone (408) 737-4600 Fax (408) 737-4611 © Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. 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All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. EV151.2007.10.1.0 www.analogictech.com 5