LM10504EVAL/NOPB

LM10504EVAL User Guide Triple Buck + LDO Power Management Unit Evaluation Kit www.ti.com 4Q 2011 LM10504EVAL User Guide Scope of Document This document will describe the functionality of the LM10504EVAL, the hardware and software setup, and the use of both the board and software. General Description The LM10504 is an advanced Power Management Unit (PMU) containing three configurable, high efficiency buck regulators for supplying variable voltages. The device is ideal for supporting ASIC and SOC designs for SSD and flash drives. Evaluation Kit Overview LM10504 Evaluation Kit is based on an all-onboard system. The board operates through the USB port. Figure 1: LM10504 Evaluation Board The evaluation kit consists of: • LM10504 evaluation board • USB interface cable • CD including: ° Evaluation software graphical user interface (GUI) ° LM10504 datasheet • User Guide LM10504EVAL User Guide 2 Texas Instruments 4Q 2011 LM10504EVAL User Guide Evaluation Software LM10504 evaluation software is supplied together with documentation regarding the circuit. Copy the folder “lm10504” to your PC’s hard disk. The software is run by double clicking the icon of lm10504.exe found in the folder. The software does not require any installation. The evaluation software allows control of all registers necessary to program the device. To simplify the use of software, the registers are set by directly named controls. The user does not need the register value as this is taken care of by the software. For example, to change LDO3 output voltage to 1.0V, choose the related value and the software will send the correct value to the LDO3 control register Hardware Set Up Please use ESD protection when handling the evaluation boards to prevent any damage from ESD events! Connect the LM10504 evaluation board to the USB port of a PC using the USB cable. When the USB board is plugged in for the first time, the operating system prompts for “New hardware found” and installs the USB driver. If this does not happen, try unplugging and plugging the cable in again. Always disconnect the USB cable from the computer when changing jumper settings. If the evaluation board is not responding or the evaluation software hangs up, disconnect the USB cable for 5 seconds. Software Set Up The graphical user interface has a main screen with two tab screens (System and Log) which allow control and indication for different functions of the device. Once the evaluation board is connected to the PC, double click on the GUI icon and the device can be controlled via the software interface. LM10504EVAL User Guide 3 Texas Instruments 4Q 2011 LM10504EVAL User Guide Software Figure 2: LM10504 Evaluation Software Main Screen Using the Evaluation Software The LM10504EVAL should become active as soon as the USB cable is plugged in. When the device starts up correctly, the green LED LD1 (DC IN) is illuminated. All of the device functions can be accessed via the control buttons. Main screen As shown in Figures 2 and 3, the top and bottom portions of the screen are visible in both tab screens. Common functions can be controlled here. Top of screen The left corner of the of screen contains the Direct Register Access frame. Binary data may be written and read from the registers. Use hexadecimal values in address fields. Correct data value can be created using buttons b0-b7. Value is immediately written to the device by pressing the Store button and read from the device by pressing the Read button. The Probe frame in the center of the screen contains the results of voltage measurements. Values can be read by pressing the Measure button in lower right corner of the screen. The Pins frame in the right corner of the screen shows the status of the Interrupt pin. It also contains the Reset button and checkboxes to control Vselect_B2 and Vselect_B3 signals. Pressing the Reset button causes 100 ms positive pulse in reset pin. LM10504EVAL User Guide 4 Texas Instruments 4Q 2011 LM10504EVAL User Guide LM10504 reads the state of Vselect_B2 and Vselect_B3 pins only during startup. When LM10504 is using the USB bus as a power supply, pins Vselect_B2 and Vselect_B3 have no effect on LM10504. User can set pins in software and then power up LM10504 using an external power supply. Another way to set pins Vselect_B2 and Vselect_B3 is by using user connector J1 before powering up the board. To save power, the device can be placed into sleep mode (DEVSLP) by asserting the DEVSLP pin high. While in sleep mode, Buck1 and Buck2 are disabled. Buck3’s output voltage is transitioned into PSML as set by LM10504 register 0X09. The DEVSLP pin is internally pulled down. Bottom of screen This part of the screen contains the following checkboxes and buttons: Poll pins checkbox Allows continuous reading of the Interrupt pin state and results of onboard ADC. Poll status checkbox Allows continuous reading of the evaluation chip status register. Auto write checkbox If this box is checked, any change to registry will be written to the device immediately. Otherwise, the user must press the Write regs button to update registers. This way, the user can change values in several registers and update changes simultaneously. Measure button Reads and shows the onboard voltages at the top of the screen. Read pins button Reads the state of Interrupt pin. Read regs button Reads the content of every register and updates the screen accordingly. Write regs button If the Auto write checkbox is disabled, the user can press this button to update the content of every register. There is a status bar at the bottom of the screen. It shows whether or not the connection to the evaluation board is established. (In Figure 2, the status bar reads ready.) LM10504EVAL User Guide 5 Texas Instruments 4Q 2011 LM10504EVAL User Guide Software System Settings Tab Selecting this tab, as shown in Figure 2, allows access to the controls of Buck1, Buck2 and Buck3 regulators, comparator, LDO sleep mode, and IRQ (Interrupt) pin polarity. It also shows a log of occurred events. In the System status/interrupts/events frame, the user can choose which interrupts are enabled with the checkboxes on the left. The user can enable the Poll status checkbox in the lower left corner of the screen to get continuous status updates (1 update per second). In the Buck1, Buck2, and Buck3 frames, the user can set the output voltage of buck regulator, enable individual regulator, or force it to PWM mode. In the Comparator frame, the user can enable comparator, set the threshold voltage and hysteresis. Misc frame contains controls for LDO sleep mode and Interrupt pin polarity. Log Tab This tab, shown in Figure 3, records all I2C transfers. The user can copy write or read sequences to the clipboard. The log window can be cleared by pressing the Clear button. Figure 3 : Log Tab LM10504EVAL User Guide 6 Texas Instruments 4Q 2011 LM10504EVAL User Guide Hardware Using the Evaluation Hardware Connectors are provided to allow a battery connection and output voltage measurement. Jumpers allow user selectable or USB controlled settings for device functions. Power supply The evaluation board may power from a battery connector or from the USB interface. Control A green LED (DC IN) will be illuminated once the LM10504 has started up. Set the jumper between J2 pin1 and TP27 to use supply from USB. Maximum current for USB supply is 500 mA. The logic signals can be controlled either by the evaluation software or externally through USER CONNECTOR J1. Set the jumper block from JP2 to JP10 accordingly. BATTERY CONNECTOR J2 USER CONNECTOR J1 Pin Function Pin Function 1 Battery (+) terminal 1 VIN_IO 2 SPI_CS 2 GND 3 SPI_DI 3 GND 4 SPI_DO 4 No connection 5 SPI_CLK 6 STANDBY 7 RESET 8 IRQ 9 HL_B2 10 HL_B3 11 DEVSLP For accessing the signals externally via this connector, jumpers from JP2 to JP10 should be set to EXT position. LM10504EVAL User Guide 7 Texas Instruments 4Q 2011 LM10504EVAL User Guide Hardware Control (continued) CONNECTOR J3 CONNECTOR J7 Pin Function Pin Function 1 VIN_B1 1 VIN_B3 2 VIN_B1 2 VIN_B3 3 GND 3 GND CONNECTOR J4 CONNECTOR J8 Pin Function Pin Function 1 BUCK1 1 BUCK3 2 BUCK1 2 BUCK3 3 GND 3 GND CONNECTOR J5 CONNECTOR J11 Pin Function Pin Function 1 VIN_B2 1 VIN 2 VIN_B2 2 VIN 3 GND 3 GND CONNECTOR J6 CONNECTOR J12 Pin Function Pin Function 1 BUCK2 1 LDO 2 BUCK2 2 LDO 3 GND 3 GND LM10504EVAL User Guide 8 Texas Instruments 4Q 2011 LM10504EVAL User Guide Hardware PCB Schematic LM10504EVAL Board Schematics LM10504EVAL User Guide 9 Texas Instruments 4Q 2011 LM10504EVAL User Guide Hardware Board Layout Top Layer Mid Layer 1 LM10504EVAL User Guide 10 Texas Instruments 4Q 2011 LM10504EVAL User Guide Mid Layer 2 Bottom Layer LM10504EVAL User Guide 11 Texas Instruments 4Q 2011 TI Worldwide Technical Support Internet TI Semiconductor Product Information Center Home Page support.ti.com TI E2E™ Community Home Page e2e.ti.com Product Information Centers Americas Phone +1(972) 644-5580 Brazil Phone 0800-891-2616 Mexico Phone 0800-670-7544 Fax +1(972) 927-6377 Internet/Email support.ti.com/sc/pic/americas.htm Europe, Middle East, and Africa Phone European Free Call International Russian Support 00800-ASK-TEXAS (00800 275 83927) +49 (0) 8161 80 2121 +7 (4) 95 98 10 701 Note: The European Free Call (Toll Free) number is not active in all countries. 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