LM10000

Evaluation Board for LM10000 - PowerWise® AVS System Controller Evaluation Board for LM10000 - PowerWise® AVS System Controller LM10000 Overview The LM10000 is used to enable Adaptive Voltage Scaling (AVS) to non-AVS regulators. It includes a complete Slave Power Controller (SPC 2.0) to communicate to the PowerWise Interface® (PWI 2.0), and a programmable current output DAC that allows voltage control to any regulator utilizing a feedback node/resistors to set the output voltage. In addition to enabling AVS the LM10000 allows the system to control power states such as sleep and shutdown and to configure the voltage step slew rate from the PWI. National Semiconductor Application Note 2054 Mark Hartman June 17, 2010 It is configured to operate with the following conditions: Parameter VDD VAVS* Default Voltage 3.0 - 5.5 0.6 - 1.2V 7-bit Programming Range Current (mA) * VAVS range assumes the slave regulator has a 0.6V feedback voltage, and 10 kΩ feedback resistors. Evaluation Board Overview The LM10000 evaluation board provides all the circuitry needed to conveniently demonstrate PowerWise® AVS on nonAVS regulators. 30122904 FIGURE 1. LM10000 Evaluation Board AN-2054 © 2010 National Semiconductor Corporation 301229 www.national.com AN-2054 LM10000 Evaluation Board Quick Start A typical set up using LM10000 requires an LM10000 evaluation board, a USB to PWI baseboard, a PC with USB port, Basic Setup (Open Loop Voltage Scaling) and a slave regulator with external feedback resistors. The slave regulator should be specified for the needs of the load (output power, input voltage range, etc.). 30122905 FIGURE 2. Basic Setup 1. 2. 3. 4. 5. 6. 7. Install the LM10000 GUI on a PC in close proximity to the LM10000 set up. Insure that LM10000 eval board is connected to USB to PWI base board. Connect a wire from IAVS to the center of the feedback resistor divider on the slave regulator board. Connect a wire from the LM10000 evaluation board ground to the slave regulator board ground. Connect a USB cable from a PC to the LM10000 Evaluation board*. Apply power to the input of the slave regulator. Use the GUI to program IAVS and observe slave regulator voltage scaling on a scope or DMM. * The LM10000 evaluation board can be powered by the USB to PWI baseboard or externally. See Table 1. Once power is applied, the LM10000 enable and logic input pins are pulled up by on-board pull-up resistors , except the FLT_N and CONTROL pin. If the GUI is used, please press the two buttons for FLT_N and CONTROL down (set to 1) and the device is active. If the 20-pin connector is used, please make sure these two pins are high (push-pull connection on the board). www.national.com 2 AN-2054 Advanced (Enable Power Management and Voltage Scaling) 30122914 FIGURE 3. Advanced Setup 1. 2. 3. 4. 5. 6. 7. 8. Install the LM10000 GUI on a PC in close proximity to the LM10000 set up. Insure that LM10000 eval board is connected to USB to PWI base board. Connect a wire from IAVS to the center of the feedback resistor divider on the slave regulator board. Connect a wire from CNTL_EN to the enable input of the slave regulator (requires the slave regulator to have a logic enable input). Connect a wire from the LM10000 evaluation board ground to the slave regulator board ground. Connect a USB cable from a PC to the LM10000 Evaluation board.* Apply power to the input of the slave regulator. Use the GUI to program IAVS and power states (active, sleep, shutdown); observe slave regulator voltage on a scope or DMM. * The LM10000 evaluation board can be powered by the USB to PWI baseboard or externally. See Table 1. Once power is applied, the LM10000 enable and logic input pins are pulled up by on-board pull-up resistors except the FLT_N and CONTROL. If the GUI is used, please press the two buttons for FLT_N and CONTROL down (set to 1) and the device is active. If the 20-pin connector is used, please make sure these two pins are high (push-pull connection on the board). 3 www.national.com AN-2054 In Situ PowerWise® AVS Evaluation Using LM10000 Evaluation Board The LM10000 evaluation board can be used to facilitate AVS evaluation of a non-AVS application. In many cases, it is de- sired to understand how much power savings can be achieved by lowering the voltage of an ASIC or FPGA. With a couple connections from the LM10000 evaluation board to the system board, power savings analysis can be done without disrupting the power layout of the system board. 30122915 FIGURE 4. In Situ PowerWise® AVS Setup (Closed Loop Voltage Scaling) TABLE 1. Jumper Settings Jumper P1 P2 P3 P4 P5 P6 VPWI to VBAT VPWI to VPWI_EXT VDD to VBAT VDD to VDD_EXT Connection Description VPWI external input VDD external input 20-pin header to connect all necessary signals to application board for closed-loop AVS evalution VDD powered by USB to PWI baseboard (3.6V) VDD powered externally IAVS_MIR measurement VPWI powered by USB to PWI baseboard VPWI powered externally www.national.com 4 AN-2054 5 30122907 FIGURE 5. LM1000 AVS System Controller Schematic www.national.com AN-2054 TABLE 2. Bill of Materials Designator C1 C2 C3 R1 R2 R3, R4, R5, R6 R7, R9, R12, R13 R8 R10 R11 R14 U1 Comp. Type Capacitor Capacitor Capacitor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor IC Value 0.1uF 1uF 0.1uF 1.50k 1.50k 1.00k 10.0k 27 40.2k 1.00 54.9k Package Reference 0603 0603 0603 0805 0603 0603 0603 0603 0805 0603 0805 LLP 14 Description Ceramic, Y5V, 16V, 80% Ceramic, X5R, 6.3V, 10% Ceramic, X7R, 16V, 10% 1%, 0.125W 1%, 0.1W 1%, 0.1W 1%, 0.1W 5%, 0.1W 1%, 0.125W 1%, 0.1W 1%, 0.125W Manufacturer TDK TDK TDK Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale Vishay-Dale National Semiconductor Corporation Part Number C1608Y5V1C104Z C1608X5R0J105K C1608X7R1C104K CRCW08051K50FK EA CRCW06031K50FK EA CRCW06031K00FK EA CRCW060310K0FK EA CRCW060327R0JN EA CRCW080540K2FK EA CRCW06031R00FN EA CRCW080554K9FK EA LM10000SDE NOPB www.national.com 6 AN-2054 Layout Artwork 30122901 FIGURE 6. Evaluation Board (Top View) 30122909 FIGURE 7. Top Layer 7 www.national.com AN-2054 30122910 FIGURE 8. Mid-Layer 1 30122911 FIGURE 9. Mid-Layer 2 www.national.com 8 AN-2054 30122912 FIGURE 10. Bottom Layer 30122902 FIGURE 11. Top Silk Screen 9 www.national.com AN-2054 30122913 FIGURE 12. Bottom Silk Screen www.national.com 10 AN-2054 Notes 11 www.national.com Evaluation Board for LM10000 - PowerWise® AVS System Controller Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers Audio Clock and Timing Data Converters Interface LVDS Power Management Switching Regulators LDOs LED Lighting Voltage References PowerWise® Solutions Temperature Sensors PLL/VCO www.national.com/amplifiers www.national.com/audio www.national.com/timing www.national.com/adc www.national.com/interface www.national.com/lvds www.national.com/power www.national.com/switchers www.national.com/ldo www.national.com/led www.national.com/vref www.national.com/powerwise WEBENCH® Tools App Notes Reference Designs Samples Eval Boards Packaging Green Compliance Distributors Quality and Reliability Feedback/Support Design Made Easy Design Support www.national.com/webench www.national.com/appnotes www.national.com/refdesigns www.national.com/samples www.national.com/evalboards www.national.com/packaging www.national.com/quality/green www.national.com/contacts www.national.com/quality www.national.com/feedback www.national.com/easy www.national.com/solutions www.national.com/milaero www.national.com/solarmagic www.national.com/training Applications & Markets Mil/Aero PowerWise® Design University Serial Digital Interface (SDI) www.national.com/sdi www.national.com/wireless www.national.com/tempsensors SolarMagic™ THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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