SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING USER GUIDE SX8122EVK USER GUIDE Evaluation Kit for SX8122 1V Motor/LED Timer Description Features The SX8122EVK is a platform for rapid prototyping of ultra low power timer applications. It consists of a single board with the SX8122, world’s first true 1V motor/LED controller with programmable timer, and some peripherals like a miniature vibration motor, red and blue SMD LED. The evaluation kit allows the user to design low voltage 555 timer applications to drive a motor, send a burst to control a LED or boost a command voltage. The SX8122 toggles its output high or low according to the state of an analog pin. Threshold voltages on the analog pin are set to 1/3 and 2/3 of VDD. One SX8122 output goes low when VDD is higher than the full charge voltage of an NiMH cell to control a minimal charger. The device also controls its IO state starting at 0.6V to facilitate power-up. Combined with the possibility to isolate the board’s components not relevant for the end application, designers can optimize all variables that will make their application as efficient as possible. SX8122 Motor Driver with LED Controller • 1 V operation • Timer control • Integrated NiMH level indicator • Motor control • LED booster control Power • 0.9 to 2V operating voltage • Allows single cell NiMH or NiCd battery supply • AAA socket, optional AA socket or external supply User Interface • External 1Hz dual slope oscillator • Prototype area with SX8122 I/Os placed on pads • Board supply and ground placed on pads Motor Interface • Miniature vibration motor ( 1-1.8V, 6mm) • User access to 2.5Amps NPN transistor emitter • Board motor / user motor jumper selector LED interface • Red (1.7V) SMD LED booster control demo • Blue (3.4V) SMD LED booster control demo • Red LED, blue LED or user LED jumper selectors • 2.5Amps NPN transistor for high booster current • High current coil • Pads for user SMD LED • Pads for optional user trough hole LED • Pads for user coil Ordering Informations EVK Part Number Function SX8122EVK SX8122ISTRT Evaluation - WEEE/RoHS compliant- Pb-Free and Halogen Free. ACS - Revision 1.0 © Semtech Corp. October 2010 Page 1 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING USER GUIDE TABLE OF CONTENT Section Page INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 2 3 3.1 Feature Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Critical and Non-Critical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 4 4 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 5 5.1 5.2 6 6.1 6.2 6.3 7 Board powering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dual slope controlled oscillator demonstration mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Motor interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LED booster interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NiMH pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin access and prototype areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 5 5 6 6 6 7 7 HARDWARE DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 8 9 10 11 12 EVK Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Board Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Board Layout and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 EVK Bill of Material List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Board Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 ACS - Revision 1.0 © Semtech Corp. October 2010 Page 2 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING USER GUIDE INTRODUCTION 1 Feature Content EVK Description EVK Overview EVK Operation EVK Schematic EVK Bill of Material List EVK Layout Drawings EVK limitations 2 Description SX8122EVK is the evaluation board for the SX8122 1V Motor and LED timer. The EVK is designed to provide a working demonstration of the SX8122ISTRT including a miniature motor-vibror and SMD LEDs. This guide contains information relating to the usage of the EVK and should be used in conjunction with the datasheet for the device. The datasheet contains detailed information including the electrical characteristics and the detailed features of the device. This guide can be used to familiarize the user with the features of the device and for testing electrical characteristics of particular interest to the user. The tool gives also the user the possibility to develop his application by interfacing his own peripherals/ systems, choosing its external power supply, finding the best configuration parameters or mounting and supplying components on different prototype areas. ACS - Revision 1.0 © Semtech Corp. October 2010 Page 3 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING 3 USER GUIDE Overview 1Hz DUAL SLOPE RC OSCILLATOR CONNECTION TO TRIGGER PIN DISCHARGE PIN CONNECTION TO Rtdown CHARGE PIN CONNECTION TO Rtup BOARD SUPPLY AND GROUND USER ACCESS AAA BATTERY HOLDER SX8122ISTRT 1V MOTOR/LED TIMER USER ACCESS TO SX8122 SIGNALS 2.54mm PROTOTYPE AREA COIL FOR LED BOOSTER NPN TRANSISTOR TRANSISTOR EMITTER TO MOTOR CONNECTION NPN TRANSISTOR BOARD SUPPLY JUMPER LED SELECTOR BLUE LED RED LED 1V MOTOR-VIBROR SMD LED PROTOTYPE AREA VDD / VSS ACCESS TRANSISTOR EMITTER OUTPUT Figure 1. SX8122EVK Overview 3.1 Critical and Non-Critical Components The bill of materials includes many non-critical components that are useful for evaluation purposes. The critical component necessary for design-in is the decoupling capacitor C1 shown in Figure 1 close to the SX8122 device. ACS - Revision 1.0 © Semtech Corp. October 2010 Page 4 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING USER GUIDE OPERATION 4 Board powering Plug a battrery in the socket and the JP2 jumper to power the board. The JP2 jumper allow also to measure the board or chip power consumption. For chip power consumption meausring, the JP3 and JP1 jumpers must be unplugged to disconnect the MOTOR and LED booster loads. Figure 2. Board battery powering with JP2 jumper 5 Input selection 5.1 Dual slope controlled oscillator demonstration mode Plugging JP5, JP6 and JP7 connectes a capacitor between TRIGGER and VSS and resistors between pin TRIGGER and pins CHARGE and DISCHARGE. It builds a 1Hz oscillator which ramp-up is controlled by R2*C2 and ramp-down by R1*C2. JP5 TRIGGER JP6 SX8122 VDD R1 DISCHARGE JP7 R2 CHARGE VSS C2 Figure 3. Dual slope controlled oscillator 5.2 User Mode Disconnect the JP5, JP6 or JP7 jumpers. ACS - Revision 1.0 © Semtech Corp. October 2010 Page 5 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING 6 Outputs 6.1 Motor interface USER GUIDE VDD D1 JP4 SX8122 JP3 VDD MOTOR Q1 VSS VSS Figure 4. Board Motor output options 6.2 LED booster interface When the SX8122 is active, the LED pin sends a 43kHz burst to control a LED or boost a command voltage. VDD LED1 Red L2 SX8122 VDD User area JP1 VSS LED2 Blue LED Q2 VSS Figure 5. LED booster JP1 selector allows to select LED1 (red), LED2 (blue), or disconnect the SX8122 LED output from board components for user specific component. The 1.27mm wrap user area close to the LEDs allows an access to VDD and VSS. ACS - Revision 1.0 © Semtech Corp. October 2010 Page 6 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING 6.3 USER GUIDE NiMH pin Pin NIMH goes high when VDD is below the NIMH threshold of 1.41V and low when VDD is above the same threshold. A 30mV hysteresis allow to remove NiMH pin oscillation when the VDD voltage is near the threshold. The supply voltage on VDD pin is checked at a 1Hz rate, so the NiMH pin can switch with a delay of 1 seconds max. 7 Pin access and prototype areas The EVK features prototype areas, which allows custom interfacing with the SX8120 I/O and power lines to other circuitry in support of system evaluation. Figure 6 shows the EVK’s layout as viewed from the component side of the board. Figure 6. Prototype areas Connections can also be broken out via on-board headers immediately adjacent to the device. ACS - Revision 1.0 © Semtech Corp. October 2010 Page 7 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING USER GUIDE HARDWARE DESCRIPTION 8 EVK Features Evaluation board allowing the access to every SX8122 pins. VDD: double battery socket footprint AA/AAA. AAA socket mounted. Credit card format: 85x55mm. Mounted RC for dual slope oscillator demo Motor-vibror and red/blue LED boosters demo, optionally disconnected (jumper). 2.5 Amp. NPN transistor on MOTOR and LED outputs External voltage supply 2.54 and 1.27 mm wrap user zones All components on top side, 2 layers ACS - Revision 1.0 © Semtech Corp. October 2010 Page 8 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING 9 USER GUIDE Board Schematic Figure 7. SX8122EVK schematic ACS - Revision 1.0 © Semtech Corp. October 2010 Page 9 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING 10 USER GUIDE Board Layout and Dimensions 85mm 55mm Figure 8. SX8120EVK Board Layout and Dimensions ACS - Revision 1.0 © Semtech Corp. October 2010 Page 10 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING 11 Table 1. USER GUIDE EVK Bill of Material List SX8122EVK Bill of Material Name Quantity Type Package Reference/Value Comment BAT1 1 battery AAA KEYSTONE 2466 C1 1 capacitor 603 100nF C2 2 capacitor 1206 C1206C226M8PAC D1 1 diode 805 1N4148 IC1 1 IC SO8 SX8122 JP1 1 jumper 3x2 JP2,JP3,JP 4,JP5,JP6,J 2 P7 jumper 1x2 L2 1 passive inductance LQH43CN221K03L LED1 1 led 603 SML-310VTT86L red LED2 1 led 603 KPG-1608QBC-D blue Q1,Q2 2 transistor SOT23 ZXT11N20DF R1 2 resistor 603 47k R2 1 resistor 603 27k U1 1 motor ACS - Revision 1.0 © Semtech Corp. October 2010 22uF 6mm Vibration Motor (Mounted) Type 306-006 Page 11 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING 12 USER GUIDE Board Limitations Parameter Limite Unit -0.3 to 2.5 V Supply Voltage Range 0 to 2.0 V IC1 Full Spec Voltage Range 0 to1.8 V SX8122ISTRT Motor/LED timer Ambient Temperature -40 to 85 °C -100 to 100 mA VSS-0.3 to VDD+0.5 V Collector-Base Voltage 40 V Collector-Emitter Voltage 20 V Emitter-Base Voltage 7.5 V 5 A Continuous Collector Current 2.5 A Base Current 500 mA Max. of DC resistance 4.0 ohm Rated Current 110 mA 220uH inductance tolerance 10 % Max Supply Voltage Sink current on any pin Pin voltage (non-supply pins) Q1, Q2 NPN transistors for Motor and LED booster Peak Pulse Current L2 Inductance for LED booster ACS - Revision 1.0 © Semtech Corp. October 2010 Page 12 www.semtech.com/products/ SX8122EVK Evaluation Kit for SX8122 1V Motor/LED Timer ADVANCED COMMUNICATIONS & SENSING USER GUIDE © Semtech 2010 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. 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