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ERM

Or

LRA

OUT+

OUT-

100k

100k

470 pF

470 pF

Ch1-Ch2

(Differential )

Oscilloscope

Ch1

Ch2

Measurement and Analysis

www.ti.com

The DRV2604L drives LRA and ERM actuators using a 20-kHz PWM modulated waveform, but only the
frequencies around the LRA resonant frequency or the ERM DC drive voltage are relevant to the haptic
actuator vibration. The higher frequency switching content does not contribute to the vibration strength of
the actuator and can make it difficult to interpret the modulated output waveform on an oscilloscope. The
oscilloscope image on the left shows the DRV2604L unfiltered waveform and the image on the right
shows a filtered version used for observation and measurement.

Figure 25. DRV2604L Unfiltered Waveform

Figure 26. DRV2604L Filtered Waveform

If the DRV2604LEVM-CT filter is not used, TI recommends using a 1st-order, low-pass filter with a cutoff
between 1kHz and 3.5kHz . Below is a recommended output filter for use while measuring and
characterizing the DRV2604L in the lab.

Figure 27. Measuring the DRV2604L Output Signal with an Analog Low-Pass Filter

20

DRV2604L ERM, LRA Haptic Driver Evaluation Kit

SLOU390A – May 2014 – Revised June 2014

Submit Documentation Feedback

Copyright © 2014, Texas Instruments Incorporated

Содержание DRV2604L ERM

Страница 1: ...microcontroller linear actuator eccentric rotating mass motor and capacitive touch buttons which can be used to completely demonstrate and evaluate the DRV2604L This document contains instructions to...

Страница 2: ...Board 1 2 Board Diagram 4 3 DRV2604LEVM CT Mode Sets 5 4 ERM Click and Bounce Waveform Button 1 7 5 LRA Ramp Up and Click Waveform Button 2 7 6 ERM Closed Loop Click Waveform Button 1 7 7 ERM Open Lo...

Страница 3: ...LEVM CT Schematic 23 30 X Ray Top View 24 31 Top Copper 24 32 Layer 2 Copper 25 33 Layer 3 Copper 25 34 Bottom Copper 26 List of Tables 1 Mode and Effects Table 6 2 Waveform Effects 11 3 Binary Counti...

Страница 4: ...4LEVM CT to an available USB port on your computer using the included mini USB cable The demo begins with a board power up sequence and then enters the demo effects mode The four larger buttons B1 B4...

Страница 5: ...put to DRV2604L IN TRIG JP2 Shorted 3 3 V reference for I2 C JP3 JP4 Shorted Connect on board actuators to DRV2604L MSP USB to MSP Select USB 5 V or VBAT power for the MSP430 DRV USB to DRV Select USB...

Страница 6: ...Bump Release Internal Trigger B3 Double Strong Click Ext Edge Trig B4 Click Open Loop Controller PWM Mode 3 B1 Strong Click LRA RAM Ext Level Trig LED M3 On B2 Single Cycle Click Internal Trigger B3 S...

Страница 7: ...ERM Clicks Mode 4 shows the difference in open loop and closed loop ERM clicks In closed loop the driver automatically overdrives and brakes the actuator In open loop the waveform must be predefined w...

Страница 8: ...with a static drive frequency and overdrive and braking times Figure 10 shows a closed loop waveform with overdrive and braking while Figure 11 shows open loop mode that does not have overdrive or bra...

Страница 9: ...rm has 43 more acceleration Figure 12 LRA Auto Resonance ON Figure 13 LRA Auto Resonance OFF Waveform Button 1 Waveform Button 2 The reason for higher acceleration can be seen in the acceleration vers...

Страница 10: ...Braking is not supported in open loop thus there is no reverse operation of the actuator shown in the graph Figure 16 LRA Click with Braking in Open Loop Figure 17 LRA Click with Braking in Auto Reso...

Страница 11: ...the or buttons B1 Press to select ERM B2 Press to select LRA 2 Then use the RAM effects as described above 2 4 Waveform Library Effects List Table 2 lists the descriptions of the waveforms embedded in...

Страница 12: ...ncrement mode button for approximately 3 seconds until the mode LEDs flash and the colored LEDs flash once 2 Press and hold the increment mode button one more time until the mode LEDs flash and the co...

Страница 13: ...crement amplitude using B3 and B2 Test Buzz OFF B4 Test new amplitude using B2 Choose actuator using buttons B1 and B2 in Mode 0 LEDs 00110 or Mode 1 B3 Decrease output voltage 1 B4 Increase output vo...

Страница 14: ...urations 4 1 Input and Output Overview The DRV2604LEVM CT allows complete evaluation of the DRV2604L though test points jacks and connectors Table 4 gives a brief description of the hardware Table 4 H...

Страница 15: ...preferred while using the USB as the power source remove R5 and add a 0 resistor across R4 4 3 Using an External Actuator Figure 19 Terminal Block and Test Points The DRV2604LEVM CT can be used with a...

Страница 16: ...V2604L using PWM follow the instructions below 1 Enter Additional Hardware Modes 2 Select Mode 2 00010 b using the increment mode button B1 Disable Amplifier B2 ERM Mode B3 LRA Mode B4 No function 3 C...

Страница 17: ...int 4 5 1 MSP430 Trigger Control 1 Enter Additional Hardware Modes 2 Select Mode 0 00000 b using the increment mode button B1 Select the on board ERM B2 Select the on board LRA B3 Trigger Select 1 Int...

Страница 18: ...rolled by an external I2 C source Attach the external controller to the I2 C header at the top of the board be sure to connect SDA SCL and GND from the external source I2 C communication is possible o...

Страница 19: ...igure 23 2 Enter Additional Hardware Modes 3 Select Mode 5 00101 b using the increment mode button 4 In Mode 5 choose button B1 B4 depending on the actuator and input coupling B1 AC Coupling ERM B2 DC...

Страница 20: ...oscope The oscilloscope image on the left shows the DRV2604L unfiltered waveform and the image on the right shows a filtered version used for observation and measurement Figure 25 DRV2604L Unfiltered...

Страница 21: ...4 Connect the programmer to an available USB port 5 Connect the programmer to the SBW header on the DRV2604LEVM CT 6 In CCS a Open the project file by selecting Project Import Existing CCS Project b...

Страница 22: ...ode Selection 8 NC 9 P2 0 Button 1 10 P2 1 Button 2 11 P2 2 Button 3 12 P3 2 PWM 13 P3 3 WLED 0 14 P3 4 WLED 1 15 P2 3 Button 4 16 P2 4 Button 17 P2 5 Button 18 P3 5 WLED 2 19 P3 6 WLED 3 20 P3 7 WLED...

Страница 23: ...02 249 R18 249 0402 R19 TPS73633DBV 3 3V 400mA U3 GND White 0603 M4 249 0402 R15 WCSP6 YFP U5 TS5A12301EYFPR GND LRA_OUT LRA_OUT JP3 0402 DNP R31 DNP 0402 R30 0402 0 0 R32 Vbat 0 1ufd 16V 0402 C12 GND...

Страница 24: ...Layout Figure 30 X Ray Top View spacer Figure 31 Top Copper 24 DRV2604L ERM LRA Haptic Driver Evaluation Kit SLOU390A May 2014 Revised June 2014 Submit Documentation Feedback Copyright 2014 Texas Inst...

Страница 25: ...Figure 32 Layer 2 Copper spacer Figure 33 Layer 3 Copper 25 SLOU390A May 2014 Revised June 2014 DRV2604L ERM LRA Haptic Driver Evaluation Kit Submit Documentation Feedback Copyright 2014 Texas Instrum...

Страница 26: ...ayout www ti com Figure 34 Bottom Copper 26 DRV2604L ERM LRA Haptic Driver Evaluation Kit SLOU390A May 2014 Revised June 2014 Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporate...

Страница 27: ...5R ROHS TDK CORP 0BC 13 C1005X5R0J104K 3 C8 C9 C10 445 1266 1 CAP SMD0402 CERM 0 1UFD 6 3V 10 X5R ROHS TDK CORP 14 0805YD106KAT2A 1 C6 478 5165 1 CAP SMD0805 CERM 10UFD 16V X5R 10 ROHS AVX 15 GRM155R6...

Страница 28: ...ON 2PIN 6A 125V GREEN 100LS ROHS PHOENIX CONTACT Test Points and Switches 36 5011 2 GND TP1 Solder so 5011K PC TESTPOINT BLACK 063 HOLE ROHS KEYSTONE ELECTRONICS that color ring is secured 37 5003 4 P...

Страница 29: ...inal May 2014 to A Revision Page Changed C1 and C2 designator value to 1 0 F in schematic 23 Changed contents of item 12 in BOM 27 29 SLOU390A May 2014 Revised June 2014 Revision History Submit Docume...

Страница 30: ...dling and use of EVMs and if applicable compliance in all respects with such laws and regulations 10 User has sole responsibility to ensure the safety of any activities to be conducted by it and its e...

Страница 31: ...his 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 Opera...

Страница 32: ...age et ayant un gain admissible maximal et l imp dance requise pour chaque type d antenne Les types d antenne non inclus dans cette liste ou dont le gain est sup rieur au gain maximal indiqu sont stri...

Страница 33: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

Страница 34: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments DRV2604LEVM CT...

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