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ADP1655 Evaluation Board

EVAL-ADP1655

Rev. 0

Evaluation boards are only intended for device evaluation and not for production purposes.

Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or

statutory including, but not limited to, any implied warranty of merchantability or fitness for a

particular purpose. No license is granted by implication or otherwise under any patents or other

intellectual property by application or use of evaluation boards. Information furnished by Analog

Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog

Devices for its use, nor for any infringements of patents or other rights of third parties that may result

from its use. Analog Devices reserves the right to change devices or specifications at any time

without notice. Trademarks and registered trademarks are the property of their respective owners.

Evaluation boards are not authorized to be used in life support devices or systems.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

FEATURES

Input voltage 2.7 V to 5.5 V

Evaluates 1 to 2 LED solutions

Configurable for 2-bit logic or I

C interface

Jumpers for measurement of flash LED current, coil current,

and supply current

Evaluation software included

GENERAL DESCRIPTION

The evaluation system is composed of a motherboard and a

daughterboard. The motherboard provides the I

C® signals

from the computer USB port and generates the I/O voltages

and digital high and low signals for the daughterboard. For

temperature measurement, the daughterboard can either be

plugged directly into the motherboard or connected to the

motherboard via the ribbon cable provided with the evaluation kit.

The motherboard features a 3.3 V regulator and two adjustable

regulators, one for VDDIO and one for ADP1655 supply

voltage (VIC). The daughterboard contains numerous jumpers

and test points for easy evaluation of the board.

Full performance details are provided in the ADP1655 data

sheet, available from www.analog.com. The ADP1655 data

sheet should be consulted in conjunction with this evaluation

board data sheet.

Warning

For safety reasons, do not look directly into the LEDs at close

range. They are very bright and can cause eye injury.

ADP1655 EVALUATION BOARD

08032-001

Figure 1.

Summary of content (20 pages)

PAGE 1
ADP1655 Evaluation Board EVAL-ADP1655 plugged directly into the motherboard or connected to the motherboard via the ribbon cable provided with the evaluation kit. FEATURES Input voltage 2.7 V to 5.5 V Evaluates 1 to 2 LED solutions Configurable for 2-bit logic or I2C interface Jumpers for measurement of flash LED current, coil current, and supply current Evaluation software included The motherboard features a 3.
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EVAL-ADP1655 TABLE OF CONTENTS Features .............................................................................................. 1 Timeout Duration Programming................................................7 General Description ......................................................................... 1 Fault Detection Status ...................................................................7 ADP1655 Evaluation Board ............................................................
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EVAL-ADP1655 INSTALLATION INSTRUCTIONS INSTALLING ADP1655 EVALUATION SOFTWARE Insert the ADP1655-EVALZ setup CD into the CD-ROM and run the file Setup.exe. When the dialog box shown in Figure 2 appears, click Next >> to install the files to the default destination folder, or click Browse… to choose a different location. 08032-004 1. Figure 4. Installation Summary Wait while the program installs. 08032-002 3. Figure 2.
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EVAL-ADP1655 After file installation is completed, the window in Figure 7 opens. Click Restart to complete the operation. 2. 3. Click Next > to install the driver. Click Continue Anyway and then Finish to complete the driver installation. 08032-007 5. Figure 7. Restart Prompt Window INSTALLING THE USB DRIVER 08032-009 Plug the ADP1655 board into the computer using the USB cable provided with the evaluation kit. When the system recognizes the board, the Found New Hardware Wizard dialog box appears.
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EVAL-ADP1655 USING THE SOFTWARE GUI 1 2 3 08032-010 1VIC AND VDDIO VOLTAGE SETTINGS. 2VOLTAGE, CURRENT, AND EFFICIENCY MONITORS. 3DIGITAL INPUT CONTROLS. 4MOTHERBOARD HARDWARE ENABLE BUTTONS. 4 Figure 10. ADP1655 Graphical User Interface (GUI), Hardware Configuration and Monitors Window HARDWARE CONFIGURATION AND MONITORS Follow these three steps to load the ADP165 evaluation software: 1. 2. 3.
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EVAL-ADP1655 9 1 2 3 4 7 8 5 6 08032-011 1 I2C REGISTER 0x06 CONTROLS: STROBE POLARITY, Tx_MASK ENABLE. 2 I2C REGISTER 0x04 CONTROLS: OUTPUT MODE, PEAK CURRENT LIMIT. 3 I2C REGISTER 0x03 CONTROLS: WHITE LED CURRENT SETTING. 4 I2C REGISTER 0x05 CONTROLS: FAULT REGISTER READ. 5 I2C REGISTER 0x02 CONTROLS: FLASH TIMER SETTING. 6 I2C REGISTER PROGRAM BUTTONS. 7 DIGITAL INPUT CONTROLS. 8 MOTHERBOARD HARDWARE ENABLE BUTTONS. 9 GUI PAGES: USER REGISTERS, HISTORY, AND H/W CONFIG & MONITORS. Figure 11.
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EVAL-ADP1655 EN1 and EN2 Enabled Flash 2-Bit Logic Mode Note that it is recommended to use an external power supply for this operation because fixed Flash current values are set to 320 mA and 500 mA for two and one LED(s), respectively. Otherwise, the USB current sourcing limitation of 500 mA will be exceeded. Use the I2C_EN, EN1, and EN2 buttons in Section 7. 1. 2. 1. 2. TIMEOUT DURATION PROGRAMMING 3. Set I2C_EN low (button becomes gray). Set EN1 high (green).
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08032-012 EVAL-ADP1655 Figure 12. History Rev.
PAGE 9
EVAL-ADP1655 EVALUATION BOARD OVERVIEW MOTHERBOARD USE JP16 TO POWER VIC FROM USB SUPPLY (USEFUL WHEN NO EXTERNAL DC SUPPLY AVAILABLE) U36, ADP1864: STEP-DOWN DC-TO-DC CONTROLLER AND U38, AD5622: I2C-CONTROLLED DAC ADJUSTABLE VIC SUPPLY CONNECT MOTHERBOARD TO DAUGHTERBOARD DIRECTLY AT HEADER OR WITH RIBBON CABLE JP15: SUPPLY SELECTION FOR U36 AND U39 U39, ADP1712: ADJUSTABLE 300mA LDO AND U40, AD5622: I 2C-CONTROLLED DAC ADJUSTABLE VDDIO SUPPLY ADP3303: 3.
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EVAL-ADP1655 DAUGHTERBOARD CONNECT DC SUPPLY WITH SHORT CABLES 2.65 – 5.5V MEASURE SUPPLY CURRENT WITH CURRENT LOOP ADP1655 EVAL BOARD CLOSE J9 FOR 1 LED EVALUATION MEASURE INDUCTOR CURRENT WITH CURRENT LOOP MEASURE IHPLED WITH CURRENT LOOP 08032-016 ADP1655 Figure 14. Daughterboard The ADP1655 evaluation daughterboard is designed to quickly evaluate key parameters of the ADP1655 IC.
PAGE 11
EVAL-ADP1655 One-LED Evaluation The J9 jumper can be placed to short D3 for the evaluation of the one-LED solution. Power Board from USB Port Only Jumper JP16 on the motherboard. Figure 16 illustrates jumper settings for USB powered operation. Ensure that the LED current is less than 200 mA to avoid exceeding the 500 mA current limit of the USB.
PAGE 12
EVAL-ADP1655 08032-015 EVALUATION BOARD SCHEMATICS AND ARTWORK Figure 17. ADP1655 Evaluation Motherboard Schematic Rev.
PAGE 13
08032-019 EVAL-ADP1655 Figure 18. ADP1655 Evaluation Daughterboard Schematic Rev.
PAGE 14
EVAL-ADP1655 08032-021 PCB LAYOUT 08032-022 Figure 19. Evaluation Daughterboard Top Layer 08032-023 Figure 20. Evaluation Daughterboard VIC and 3.3 V Plane Figure 21. Evaluation Daughterboard GND Plane Rev.
PAGE 15
08032-024 EVAL-ADP1655 Figure 22. Evaluation Daughterboard Bottom Layer (View from the Top) Rev.
PAGE 16
EVAL-ADP1655 ORDERING INFORMATION BILL OF MATERIALS Table 2. Description Daughterboard Capacitor, MLCC, 10 µF, 10 V, 0805, X5R Capacitor, MLCC, 10 µF, 6.
PAGE 17
EVAL-ADP1655 Description Resistor, 330 Ω, 1%, 0402, SMD Open Resistor, 10 kΩ, 1%, 0402, SMD Resistor, 1.5 kΩ, 1%, 0402, SMD Resistor, 4.7 kΩ, 1%, 0402, SMD Resistor, 0 Ω, 1%, 0402, SMD Resistor, 180 kΩ, 1%, 0402, SMD Resistor, 33 kΩ, 1%, 0402, SMD Resistor, 39 kΩ, 1%, 0603, SMD Resistor, 182 kΩ, 1%, 0603, SMD Resistor, 27 kΩ, 1%, 0603, SMD Resistor, 0.
PAGE 18
EVAL-ADP1655 NOTES Rev.
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EVAL-ADP1655 NOTES Rev.