DONAU SLIM WP 11x15x3.0 mm SPEAKER

Transcription

1 DONAU SLIM WP 11x15x3.0 mm SPEAKER The 11 x 15 x 3.0 mm rectangular speaker is a high end miniature speaker specifically designed for portable devices and smartphones where high quality sound is required. It delivers pure, uncolored sound reproduction in applications with small space. Suitable for mono and stereo applications. It offers a low resonance frequency of 800Hz in the 1cm³ back cavity. The speaker s compound membrane has an additional stiffening plate - made from a unique, lightweight composite material - that provides inner damping and results in extremely low Total Harmonic Distortion (THD) values. All materials used on the top surface of the speaker are tested to be water resistant. 100% leak measurement guarantees IPx8 waterproof compliance. Features: IPx8 waterproof tested in 1.5m for 30min. Waterproof compliance 100% tested for each single speaker device Rectangular shape that measures only 11 x 15 x 3.0 mm Pure, uncolored sound reproduction - Flat, wideband frequency response - Lowest resonance frequency (800 Hz) in 1cm³ back cavity Clear music and voice reproduction - Unique compound membrane with additional stiffening plate of lightweight composite material for inner damping and low THD Extremely robust spring connector 100% in-line measurement of all specified acoustical and electrical parameters. Power handling up to 600mw. Page 1 of 19

2 Contents 1. Theory of operation Mechanical Layout and Dimensions Main Dimensions Spring force PWB Layout Magnetic polarity Force layout Part Marking/Labeling Material List Water/gas tightness Electrical and Acoustical Specifications Frequency response Electro-Acoustic s Power definition for life time test Measured s Measurement setup Measurement adapter 1cm Environmental Storage Transportation Functionality Environmental tests Qualification tests Reliability tests Sample Size, Sequence Period of Shelf-Life Testing Procedures Related Documents Change History Disclaimer Page 2 of 19

3 1. Theory of operation Donau Slim WP 11x15x3.0 mm Speaker is an electro-dynamic transducer, designed to translate electrical analog signals into sound. The input signal is fed into a coil in a magnetic field, which is attached to a membrane. Through the principle of the electromagnetic force, the membrane is moved according to the contents of the input signal. Page 3 of 19

4 2. Mechanical Layout and Dimensions 2.1. Main Dimensions 2.2. Spring force Page 4 of 19

5 2.3. PWB Layout 2.4. Magnetic polarity 2.5. Force layout STATE STATICAL FORCES ON DIFFERENT STATES OF COMPONENT MIN. SURFACE OF PRESSURE [mm 2 ] MAX. PERMANENT FORCE [N] MAX. HANDLING FORCE [N] FROM FRONT TO BACK FROM SIDE 1 TO SIDE FROM SIDE 2 TO SIDE TO POT TO MEMBRANE PULL FORCE OF YOKE PULL OFF FORCE Page 5 of 19

6 2.6. Part Marking/Labeling Page 6 of 19

7 2.7. Material List 1. MATERIAL of BASKET: Polycarbonate 2. MATERIAL of MEMBRANE: Compound Foil 3. MATERIAL of POT: soft magnetic Iron 4. MATERIAL of MAGNET: Nd Fe B 5. MATERIAL of CONTACT CrNi-Steel, gold plated 6. MATERIAL of COVER: Polycarbonate 7. DIMENSION: 11x15x3.0mm 8. MASS: 1.4g 2.8. Water/gas tightness The products are 100% tested for leaks between cover and membrane. Method: Differential pressure measurement Down force on cover: 5 ±1 N Allowed leakage: < 133pa at duration of 10s. Page 7 of 19

8 3. Electrical and Acoustical Specifications 3.1. Frequency response Typical frequency response measured on baffle according to chapter 3.5 and 3.6 (distance d = 1cm calculated to 10cm, P= 600mW,1ccm) SPL limit: THD limit FRES(Hz) Min(dB) FRES(Hz) Max(dB) FRES(Hz) THD(%) Page 8 of 19

9 3.2. Electro-Acoustic s Loudspeaker mounted in 1cm³ measurement adapter acc. to Rated impedance Z: 8Ω 2. Voice coil DC resistance R: 7.4Ω±10% 3. Resonance frequency f 0 : 800Hz±10% 4. Maximum linear excursion(peak to peak) Xmax : 0.68mm 5. Characteristic sensitivity (@1W,1m) SPL average from 2kHz to 5kHz SPL at 2kHz 73±2dB 73.5±2dB 7. THD according chapter Rub & buzz no audible R&B at 600mW 9. Power handling 600mW All acoustic measurements at 23±2 C 10. Typical resonance frequency without back volume F 0 425Hz 3.3. Power definition for life time test Loudspeaker mounted in Lifetime test device (closed Box 1ccm, open front) Signal IEC268-1 with high-pass 12dB/Oct. at 800Hz, crest factor 2, used for all operating lifetime tests 1. Max short term power 1sec. ON, 1min. OFF, 60cycles 1200mW Ambient temperature 70 C 2. Max continuous power 1min. ON, 2min. OFF, 10cycles 800mW Ambient temperature 70 C 3. Max. noise power (PHC continuous) 500h 600mW Ambient temperature 70 C Page 9 of 19

10 3.4. Measured s Sensitivity SPL is expressed in db rel 20µPa, computed according to IEC Measurement set up and parameters according chapter 3.5. This test is performed for 100% of products in the production line Frequency response Frequency response is measured according test set up in chapter 3.5 data sheet and checked against the tolerance window defined in chapter 3.1. This Test is performed for 100% of products in the production line Total harmonic distortion (THD) Is measured according IEC (2nd to 5th harmonics) and test set up in chapter 3.5. This test is performed for 100% of products in the production line Rub& Buzz Rub & Buzz will be measured in the Inline-measuring device with a sinusoidal sweep. Rub and Buzz is defined as the maximum peak sound pressure in transmission range of the 5kHz high pass filter. This test is performed for 100% of products in the production line. Page 10 of 19

11 3.5. Measurement setup 3.6. Measurement adapter 1cm 3 Page 11 of 19

12 4. Environmental 4.1. Storage The transducer fulfills the specified data after treatment according to the conditions of ETS Specification of environmental test: Storage Test spec. T 1.2: Weather protected, not temperature controlled storage locations Transportation The transducer fulfills the specified data after treatment according to the conditions of ETS Specification of environmental test: Transportation Test Spec. T 2.3: Public Transportation 4.3. Functionality The transducer fulfills the specified data after treatment according to the conditions of ETS ETS Specification of environmental test: Ground vehicle installations Test spec. T 5.1: Protected installation Specification of environmental test: Portable and non-stationary use Test spec. T 7.3E: Partly weather protected and non-weather protected locations. Page 12 of 19

13 5. Environmental tests 5.1. Qualification tests According to our milestone plan (Product Creation Process), a complete qualification test will be done at design validation of products manufactured under serial conditions. 1x per year and product family a requalification takes place. The qualification process covers all tests described under 5.5 and a complete inspection Reliability tests 1x per month and product family samples are taken and submitted to tests described under Sample Size, Sequence Unless otherwise stated 20 arbitrary new samples will be used to perform each test for both, qualification and requalification test as described under 5.1 and Period of Shelf-Life The period of shelf-life is 2 years Testing Procedures Storage Tests Cold Storage Test Duration Low Temperature Storage (Ref. EN ) -40 C rel. humidity not controlled 168h Measurements after 2 hours recovery time. All samples fully operable. All acoustical parameters according specification with tolerances increased by 50 % Heat Storage Test Duration Dry Heat Storage (Ref. EN ) +85 C rel. humidity not controlled 168h Measurements after 2 hours recovery time. All samples fully operable. All acoustical parameters according specification with tolerances increased by 50 %. Page 13 of 19

14 Temperature Cycle Test Duration Change of Temperature (Ref. EN ) -40 C/+85 C Transition time <3 min. 100 cycles. 30min each temperature Measurements after 2 hours recovery time. All samples fully operable. All acoustical parameters according specification with tolerances increased by 50 % Temperature / Humidity Cycle Test Damp heat cyclic (modified) (Profile is modified from IEC Db: Damp heat, cyclic (12h + 12h).Variant 1) Temperature cycling between +30 C and +65 C with 93 % relative humidity DUTs powered off Duration Duration 18 cycles, 1 cycle = 8h Measurements after 2 hours recovery time. All samples fully operable. All acoustical parameters according specification with tolerances increased by 50 %. Page 14 of 19

15 Operating Tests Cold Operation Test Duration Cold Operation Test (Ref. EN ) -20 C rel. humidity not controlled 72h Measurements after 2 hours recovery time. All samples fully operable. signal acc. Chapter 3.3 THD may be increased after test. All other acoustical parameters according specification with tolerances increased by 50 % Heat Operation Test Duration Dry Heat Operation (Ref. EN ) +70 C rel. humidity not controlled 500h Measurements after 2 hours recovery time. All samples fully operable. signal acc. Chapter 3.3 The allowable change in sensitivity shall not be greater than 3 db. All other acoustical parameters according specification with tolerances increased by 50 % Salt Mist Test Salt Mist (Ref. IEC , Kb / Severity 2 The part must be subjected to 2 hours spray of 5% NaCl salt mist, at 35 C then be left at 40 C and 95% RH for 22h. Duration 3 cycles The samples shall be washed after the test with distilled water and dried at T< 50 C. Component may have reduced performance, but must still function properly. The allowable sensitivity difference shall not be greater than ±3dB from initial sensitivity. Page 15 of 19

16 Guided Free Fall Test - protected product / Sample size Mechanical shock (Ref. IEC Ed), Procedure 1 Speaker in drop test box or representative mechanics from a height of 1.5m onto concrete floor. 20 units Two drops on each side (2x6) One drop on each edge (1x12) Two drops on each corner (2x8) Component may have reduced performance, but must still function properly. The allowable sensitivity difference shall not be greater than ±3dB from initial sensitivity. (40 drops in total) Random Free Fall Test (Tumble Test) protected product / Sample size Impact durability (in a Tumble Tester) (Ref. IEC Ed) (SPR a7.1.1) Speaker in drop test box or representative mechanics. Random drops on steel base. 20 units 180 drops, 1m DUT power off Component may have reduced performance, but must still function properly. The allowable sensitivity difference shall not be greater than ±3 db from initial sensitivity Resistance to Electrostatic Discharge / Sample size Resistance to ESD IEC Level 4 (SPR c 2.5.1) One pole is grounded and the ESD pulse is applied to the other pole. The speaker must be stressed first with one polarisation and then with the other polarisation. DUT must be discharged between each ESD exposure. 10 exposures on each polarity / 5 units DUT Power off All samples fully operable. All acoustical parameters according specification with tolerances increased by 50%. Level 4: contact +/- 8kV, air +/- 15kV Page 16 of 19

17 Water-resistant / Sample size Water resistant acc. IPx8 (Ref. EN60529) The part must be immersed in 1,5m of water for 30min in a appropriate test adapter. 10 units 1,5m, 30min No ingress of water through the products allowed. Measurements after samples are dry. All samples fully operable. The allowable change in sensitivity shall not be greater than 3 db. All other acoustical parameters according specification with tolerances increased by 50 %. Page 17 of 19

18 6. Related Documents IEC IEC 68-2 EN ISO ISO 3951 ETS ETS ETS ETS Sound System equipment Part 5: Loudspeaker Environmental testing Environmental testing Sampling procedures for inspection by attributes Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection Sampling procedures and charts for inspection by variables for percent defectives. Specification of environmental test: Storage Test spec. T 1.2: Weather protected, not temperature controlled storage locations Specification of environmental test: Transportation Test spec. T 2.3: Public Transportation Specification of environmental test: Ground vehicle installations Test spec. T 5.1: Protected installation Specification of environmental test: Portable and non-stationary use Test spec. T 7.3E: Partly weather protected and non-weather protected locations Page 18 of 19

19 7. Change History Status Version Date ECR Comment / Changes Initials of owner Release A First Release Alice xiao Release B Change the Water proof spec Alice Xiao 8. Disclaimer Stresses above the Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only. The device may not function when operated at these or any other conditions beyond those indicated under Electrical and Acoustical Specifications. Exposure beyond those indicated under Electrical and Acoustical Specifications for extended periods may affect device reliability. The information contained in this literature is based on our experience to date and is believed to be reliable and it is subject to change without notice. It is intended as a guide for use by persons having technical skill at their own discretion and risk. We do not guarantee favorable results or assume any liability in connection with its use. Dimensions contained herein are for reference purposes only. For specific dimensional requirements consult factory. This publication is not to be taken as a license to operate under, or recommendation to infringe any exiting patents. This supersedes and voids all previous literature. Page 19 of 19