NCP2811AMTTXGEVB

NCP2811AMTTXGEVB NCP2811AMTTX Evaluation Board User's Manual Description NCP2811 is a dual audio power amplifier designed for portable communication device applications such as mobile phones. This board showcases the A version of this part in the WQFN12 package. This part is capable of delivering 27 mW of continuous average power into a 16 W load from a 2.7 V power supply with a THD+N of 1%. Based on the power supply delivered to the device, an internal power management block generates a symmetrical positive and negative voltage. Thus, the internal amplifiers provide outputs referenced to Ground. In this True Ground configuration, the two external heavy coupling capacitors can be removed. It offers significant space and cost savings compared to a typical stereo application. http://onsemi.com EVAL BOARD USER’S MANUAL Figure 1. NCP2811AMTTXGEVB Board Picture © Semiconductor Components Industries, LLC, 2011 July, 2011 − Rev. 2 1 Publication Order Number: EVBUM2010/D NCP2811AMTTXGEVB Figure 2. NCP2811AMTTXGEVB Board Schematic http://onsemi.com 2 NCP2811AMTTXGEVB Figure 3. NCP2811AMTTXGEVB Board Layout (Top View) Figure 4. NCP2811AMTTXGEVB Board Layout (Bottom View) http://onsemi.com 3 NCP2811AMTTXGEVB Table 1. BILL OF MATERIALS Item Part Description Ref. PCB Footprint Manufacturer 1 NCP2811 Audio Amplifier 2 SMD Resistor 10KW R1, R2, R3, R4 0603 Panasonic 3 Ceramic Capacitor 1 mF 6.3 V X5R C1, C2, C3, C4, C5 0603 Murata GRM185R60J105KA01 4 Stereo Connector U2 CUI Inc. SJ1−3515N 5 Jumper Header Vertical Mount, 2 positions, 100mils J16 100 mils Tyco Electronics / AMP 5−826629−0 6 I/O Connector, 2 positions J8, J19, J15 200 mils Phoenix Contact 7 Jumper Connector J18, J20 400 mils Harwin 8 Not Mounted R5, J9, J10, J6, J17,C6, C7 9 Shorted R6, R7 ON Semiconductor Manufacturer Reference NCP2811 ERJ−3GEY103V 1757242 D3082−B01 0603 NCP2811A OR NCP2811B CONFIGURATION V.1 NCP2811A Connect J11, J12. Put 10kohms on R1, R2, R3, R4. Disconnect J7, J14. V.1 NCP2811B Connect J7, J14. Disconnect J11, J12, R1, R2, R3, R4. NCP2811 TEST PROCEDURE Output Power: 1. Set Vp = 3.6 V to power supply connector (J16). 2. Set an 16 W load (resistance) on the output connectors (J8 and J17). 3. With the function generator, set a single ended signal at 1 kHz and 0.5 Vrms input signal on the left and right inputs. Apply this signal J5 and J13 connectors. a. On the NCP2811A, as R1 = R2 = R3 = R4 = 10k, OUTL_C and OUTR_C will see 0.5 Vrms. Place an oscilloscope probe on each output. You should get 0.5 Vrms output signal with a “perfect sine wave”. That is to say no clipping at the minima and maxima of the sine wave. b. On the NCP2811B, the gain is internally set to -1.5 V/V, OUTL_C and OUTR_C will see 0.75 Vrms. Place an oscilloscope probe on each output. You should get 0.75 Vrms output signal with a “perfect sine wave”. That is to say no clipping at the minima and maxima of the sine wave. Quiescent Current: Check the quiescent current. Place an 16 W load on each output (J8, J17); no input signal. Vp set to 3.6 V and J6 closed. You should measure around 6 mA. http://onsemi.com 4 onsemi, , and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. onsemi is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. The evaluation board/kit (research and development board/kit) (hereinafter the “board”) is not a finished product and is not available for sale to consumers. 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