LM3643AEVM

Using the LM3643EVM Evaluation Module User's Guide Literature Number: SNVU399 August 2014 Contents 1 2 3 4 5 2 Introduction ......................................................................................................................... 4 Setup .................................................................................................................................. 4 2.1 Input/Output Connector Description ................................................................................... 4 2.2 Setup ....................................................................................................................... 6 2.3 Operation .................................................................................................................. 6 Board Layout ....................................................................................................................... 7 Schematic ......................................................................................................................... 10 USB Interface Board and I2C-Compatible Interface Program .................................................... 12 5.1 User Interface ........................................................................................................... 13 5.2 Flags...................................................................................................................... 14 5.3 I/O Pin Controls ......................................................................................................... 14 Table of Contents SNVU399 – August 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated www.ti.com List of Figures 1 Enable Jumper Settings..................................................................................................... 4 2 VIO Jumper Settings ........................................................................................................ 4 3 STROBE Jumper Settings .................................................................................................. 5 4 TORCH/TEMP Jumper Settings ........................................................................................... 5 5 TX Jumper Settings 6 7 8 9 10 11 12 13 14 15 16 ......................................................................................................... 5 Jumper Configuration ....................................................................................................... 7 Top Assembly Layer......................................................................................................... 8 Middle Layer 1 Routing ..................................................................................................... 8 Middle Layer 2 Routing ..................................................................................................... 9 Bottom Assembly Layer (UNMIRRORED) ............................................................................... 9 LM3643EVM Schematic ................................................................................................... 10 LM3643 General User Interface .......................................................................................... 12 I2C interface Fields ......................................................................................................... 13 Write Buttons................................................................................................................ 13 Flags ......................................................................................................................... 14 I/O Pin Controls ............................................................................................................. 14 List of Tables 1 Device and Package Configurations ...................................................................................... 4 2 Bill of Materials ............................................................................................................. SNVU399 – August 2014 Submit Documentation Feedback List of Figures Copyright © 2014, Texas Instruments Incorporated 11 3 User's Guide SNVU399 – August 2014 LM3643EVM User's Guide 1 Introduction The Texas Instruments LM3643EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LM3643 High-Current LED driver. The device offers configurability via I2Ccompatible interface. It can be enabled in Flash or Torch mode via the I2C interface or externally using the STROBE and TORCH/TEMP pins. The module utilizes two LEDs (D1 & D2) mounted on the EVM. The EVM contains one Synchronous Boost LED Flash Driver (See Table 1). Table 1. Device and Package Configurations 2 FLASH LED DRIVER IC PACKAGE U1 LM3643 0.4 mm-pitch, 12-Bump DSBGA Setup This section describes the jumpers and connectors on the EVM as well as how to properly connect, set up, and use the LM3643EVM. 2.1 Input/Output Connector Description Input / GND - These are the power input terminals for the driver. The terminal block provides a power (VIN) and ground (GND) connection to allow the user to attach the EVM to a cable harness. EN (J12) - This is the jumper used to enable the LED driver (HWEN pin). The driver will be enabled when the HWEN pin is high (VIO) and disabled when it is low (GND). Figure 1. Enable Jumper Settings VIO (J16) - This pin provides power for the I2C lines (Clock & Data) and for the HWEN pin. It is recommended that this pin is connected to the VIN pin. If desired, it can be connected to the 3.3V line provided by the USB interface connector. In this configuration, communication via the I2C interface may not be possible if the supply voltage to the LED driver is below approximately 3 V. Figure 2. VIO Jumper Settings 4 LM3643EVM User's Guide SNVU399 – August 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Setup www.ti.com D1-CON (J14 pin3 and pin4) and D2-CON (J14 pin1 and pin2) are the jumpers used to connect the onboard flash LEDs to the LED output of the driver. STROBE (J9) - This pin provides an external method for initiating a flash event. The STROBE pin is connected to ground via a 300-kΩ resistor internal to the LM3643. To externally drive this pin, either connect a control signal directly to the STROBE pin of the connector or place a jumper between connector pins STROBE and PWM0. Pin PWM0 can be configured as a time-adjustable voltage pulse via the General User Interface (GUI) software provided. Figure 3. STROBE Jumper Settings TORCH/TEMP TORCH/TEMP TORCH/TEMP (J21) - This pin provides an external method for initiating a torch event. The TORCH/TEMP pin is connected to ground via a 300-kΩ resistor internal to the LM3643 as well as an externally connected NTC thermistor. To externally drive this pin, either connect a control signal directly to the TORCH/TEMP pin of the connector or place a jumper between connector pins TORCH/TEMP and PWM1. Pin PWM1 can be configured as ON or OFFvia the GUI software provided. Removing the jumper, and setting the TORCH/TEMP pin to TEMP mode, the TEMP function can be utilized via the externally connected NTC thermistor. Figure 4. TORCH/TEMP Jumper Settings TX (J11) - This pin is used to initiate a TX-interrupt event. The TX pin is connected to ground via a 300-kΩ resistor internal to the LM3643. To externally drive this pin, either connect a control signal directly to the TX pin of the connector or place a jumper between connector pins TX and PWM2. Pin PWM2 can be configured as to provide continuous voltage pulses via the GUI software provided. Figure 5. TX Jumper Settings SDA / SCL (J19) - These connections allow the user to externally control the I2C lines. For independent control of the I2C lines, do not connect the VIO jumper to either the 3.3 V or the VIN pin. SNVU399 – August 2014 Submit Documentation Feedback LM3643EVM User's Guide Copyright © 2014, Texas Instruments Incorporated 5 Setup www.ti.com OUT, LED1, LED2, TORCH/TEMP (J13, J10, J22) - These provide access to the regulated output of the driver, the outputs of the LED current sources, and the TEMP pin. The user can measure VOUT with reference to GND, VLED with reference to GND, current source headroom directly between VOUT and VLED, and can monitor or control TORCH/TEMP input. VINL/VIN (J7) - The user can monitor the Inductor Current and Input Current waveforms by omitting this jumper and using separate wires from the power supply to the VINL and VIN pins. This will remove the Input Capacitors from the Inductor and eliminate their filtering effect to the Inductor Current. J17 and J18: LED Current measurements -The LM3643EVM provides a way to accurately measure the LED current through both LEDs on board. Resistors R1 & R2 (0.1 Ω) are placed between the cathode of LED1 & LED2, respectively, and Ground. The user can first measure the resistor values accurately, by applying a known current through connector DxF and Ground and measuring the voltage between DxS and GNDS. Then, during normal flash or torch operation, the voltage measured across the resistor divided by the resistor value will equal the current through the resistor (and the LED). 2.2 Setup The input voltage range for the flash driver is 2.5 volts to 5.5 volts. The on-board LEDs or an LED module should be connected for proper operation. 2.3 Operation For proper operation of the LM3643EVM, the jumpers should be properly configured. The recommended setting, using shorting blocks is: VIO to VIN EN to VIO STROBE to PWM0 or external signal TORCH/TEMP to PWM1 or external signal TX to PWM2 or external signal LEDs (J14) shorted In this configuration, the device will power up when power is applied. 6 LM3643EVM User's Guide SNVU399 – August 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Board Layout www.ti.com Figure 6. Jumper Configuration 3 Board Layout Figure 7, Figure 8, Figure 9 and Figure 10 show the board layout for the LM3643EVM. The EVM offers resistors, capacitors, and jumpers to enable the device and to configure it as desired. The LM3643 will dissipate power, especially during high current and long duration flash events. Power will also be dissipated on the flash LEDs. The EVM layout is designed to minimize temperature rise during operation. It is recommended that in order to prevent overheating, repeated flash events in very short time intervals is avoided. SNVU399 – August 2014 Submit Documentation Feedback LM3643EVM User's Guide Copyright © 2014, Texas Instruments Incorporated 7 Board Layout www.ti.com Figure 7. Top Assembly Layer Figure 8. Middle Layer 1 Routing 8 LM3643EVM User's Guide SNVU399 – August 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Board Layout www.ti.com Figure 9. Middle Layer 2 Routing Figure 10. Bottom Assembly Layer (UNMIRRORED) SNVU399 – August 2014 Submit Documentation Feedback LM3643EVM User's Guide Copyright © 2014, Texas Instruments Incorporated 9 Schematic 4 www.ti.com Schematic GND J1 GND J3 J2 PWM0 J4 3.3V 1 2 VINL 1 2 3 J6 1 2 3 J5 PWM2 SCL 1 3 5 7 9 PWM1 2 4 6 8 10 SDA GND N2510-6002-RB GND L1 SW 1 2 2 1 DFE201610P-1R0M J7 R1 0 VIN1 J8 U1 B1 A1 VIN SW IN C1 10µF GND STROBE OUT 2 1 C1 C4 10µF J10 C5 10µF D1 D3 GND LED2 PWM1 A2 C2 10µF B2 C3 100µF CBATT J9 STROBE 1 2 3 SH-STROBE1 STROBE GND VOUT TX D2 GND LED2 J11 HWEN PWM2 C2 TX LED1 SCL 1 2 3 SH-TX1 B3 TX EN GND DCON J14 SDA 2 1 J13 SH-D1 1 2 3 4 LED1 TORCH/TEMP A3 R2 GND VIN 1 2 3 1 1 SH-EN1 EN R3 1.0k SH-D2 J17 3 2 1 R6 0.1 TORCH/TEMP t° 2 2 D1 Ultra White J18 3 2 1 1 2 3 1.0k LM3643YFF D2 Ultra White R5 0.1 J12 VIO C3 TH1 100k ohm 3.3V R4 49.9k J16 SH-VIO1 VIO J19 GND VIO SCL 1 2 3 4 SDA GND I2C GND J21 PWM0 1 GND 1 2 3 SH-TORCH1 PWMJ22 GND Figure 11. LM3643EVM Schematic 10 LM3643EVM User's Guide SNVU399 – August 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Schematic www.ti.com Table 2. Bill of Materials DESIGNATOR DESCRIPTION MANUFACTURER PART NUMBER QUANTITY !PCB1 Printed Circuit Board Any SV601027 1 C1, C2, C4, C5 CAP, CERM, 10uF, 6.3V, +/-20%, X5R, 0402 Samsung CL05A106MQ5NUNC 4 C3 CAP, CERM, 100uF, 6.3V, +/-20%, X5R, 1206 MuRata GRM31CR60J107ME39L 1 D1, D2 LED, Ultra White, SMD OSRAM LUW CAEP.G4 2 J1, J7, J8, J10, J13 Header, TH, 100mil, 2x1, Gold plated, 230 mil above insulator Samtec, Inc. TSW-102-07-G-S 5 J2 Header (shrouded), 100mil, 5x2, High-Temperature, Gold, TH 3M N2510-6002-RB 1 J3, J4, J9, J11, J12, J16, J17, J18, J21 Header, TH, 100mil, 3x1, Gold plated, 230 mil above insulator Samtec, Inc. TSW-103-07-G-S 9 J5 Standard Banana Jack, Insulated, Black Keystone 6092 1 J6 Standard Banana Jack, Insulated, Red Keystone 6091 1 J14, J19 Header, TH, 100mil, 4x1, Gold plated, 230 mil above insulator Samtec, Inc. TSW-104-07-G-S 2 J22 Header, TH, 100mil, 1pos, Gold plated, 230 mil above insulator Samtec, Inc. TSW-101-07-G-S 1 L1 Inductor, Shielded, Metal Composite, 1uH, 2.6A, 0.058 ohm, SMD Toko DFE201610P-1R0M 1 LBL1 Thermal Transfer Printable Labels, 0.650" W x 0.200" H - 10,000 per roll Brady THT-14-423-10 1 R1 RES, 0 ohm, 5%, 0.25W, 1206 Yageo America RC1206JR-070RL 1 R2, R3 RES, 1.0k ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW06031K00JNEA 2 R4 RES, 49.9k ohm, 1%, 0.063W, 0402 Vishay-Dale CRCW040249K9FKED 1 R5, R6 RES, 0.1 ohm, 5%, 0.125W, 0805 Panasonic ERJ-6RSJR10V 2 SH-D1, SH-D2, SH-EN1, SHSTROBE1, SH-TORCH1, SH-TX1, SH-VIO1 Shunt, 100mil, Gold plated, Black 3M 969102-0000-DA 7 TH1 Thermistor NTC, 100k ohm, 5%, 0402 MuRata NCP15WF104J03RC 1 U1 IC LED DRVR PHOTO FLASH Dual 1.5A SMD, YFF0012AEAD Texas Instruments LM3643YFF 1 VIN1 Test Point, TH, Compact, Red Keystone 5005 1 SNVU399 – August 2014 Submit Documentation Feedback LM3643EVM User's Guide Copyright © 2014, Texas Instruments Incorporated 11 USB Interface Board and I2C-Compatible Interface Program 5 www.ti.com USB Interface Board and I2C-Compatible Interface Program Texas Instruments has created an I2C-compatible program and USB docking board (USB2ANY) that can help exercise the part in a simple way. Contained in this document is a description of how to use the USB2ANY interface box and interface software. The LM3643EVM has the means to “plug into” the USB docking board. The USB docking board provides all the control signals for the simple interface. Power to the part must be provided externally. A USB cable (provided) must be connected to the board from a PC. The I2C-compatible interface program provides all of the control that the LM3643 part requires. For proper operation, the USB docking board should be plugged into the PC before the interface program is opened. Once connected, and the program is executed, a basic interface window will open. The image below shows the default settings. Figure 12. LM3643 General User Interface 12 LM3643EVM User's Guide SNVU399 – August 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated www.ti.com USB Interface Board and I2C-Compatible Interface Program The “I2C Interface” fields may be used to write or read any LM3643 register. Selecting the "Set Default Settings" button resets all registers to their default values and updates all GUI fields. Figure 13. I2C interface Fields 5.1 User Interface the LM3643 GUI provides the user with access to all of the registers found on the device. Through a combination of buttons, drop-down boxes and sliders, the user can configure the LM3643 to perform in the desired mode. Please note that no data is written to the device until the Write button found within the corresponding register is pressed. Figure 14. Write Buttons SNVU399 – August 2014 Submit Documentation Feedback LM3643EVM User's Guide Copyright © 2014, Texas Instruments Incorporated 13 USB Interface Board and I2C-Compatible Interface Program 5.2 www.ti.com Flags The contents of the LM3643 fault registers are read upon clicking the “Read Flags” button. The registers are cleared upon read back. Figure 15. Flags 5.3 I/O Pin Controls The LM3643EVM provides the user with the capability to control the TORCH, STROBE and TX inputs without the need of an external supply. The Tx Enable Button creates a continuous pulse train when depressed. The Torch EN button toggles the LM3643's TORCH/TEMP pin high when pressed and low depressed. The Ext. Strobe Button toggles the Strobe pin high for the duration entered in the field next to the button. The IR Strobe Button along with the period and width fields generate a continuous pulse train that can be used to generate a current pulse pattern on the enabled LEDs. Figure 16. I/O Pin Controls 14 LM3643EVM User's Guide SNVU399 – August 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated ADDITIONAL TERMS AND CONDITIONS, WARNINGS, RESTRICTIONS, AND DISCLAIMERS FOR EVALUATION MODULES Texas Instruments Incorporated (TI) markets, sells, and loans all evaluation boards, kits, and/or modules (EVMs) pursuant to, and user expressly acknowledges, represents, and agrees, and takes sole responsibility and risk with respect to, the following: 1. User agrees and acknowledges that EVMs are intended to be handled and used for feasibility evaluation only in laboratory and/or development environments. Notwithstanding the foregoing, in certain instances, TI makes certain EVMs available to users that do not handle and use EVMs solely for feasibility evaluation only in laboratory and/or development environments, but may use EVMs in a hobbyist environment. All EVMs made available to hobbyist users are FCC certified, as applicable. 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This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at its own expense. FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. 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