IS31AP2036 HIGH EFFICIENCY, CLASS-K AUDIO POWER AMPLIFIER WITH INTEGRATED CHARGE PUMP CONVERTER DESCRIPTION RECOMMENDED EQUIPMENT The IS31AP2036 is a Class-K audio power amplifier with high efficiency and automatic gain control. It drives up to 2.0W (10% THD+N) into an 8Ω speaker from a 4.2V VCC supply. The IS31AP2036 integrates advanced high efficiency charge pump and whole power amplifier efficiency can be up to 75%. The output power will be maintained in 0.8W, 1.0W and 1.2W. The IS31AP2036 provides low cost, space saving solution for portable equipments which need audio output with higher power by boosting up supply voltage. Its external components just include a few capacitors and resistors (no inductor). The demo board has four modes to test the functionality of the IS31AP2036. FEATURES Operates from 3.0V to 5.0V Ultra low output noise floor Low EMI -65dB (217Hz) high PSRR 0.05% low THD+N Pulse Count Control serial interface Thermal and short-circuit protection Integrated Click-and-Pop suppression circuitry Available in FCQFN-16 (2mm × 2mm) package QUICK START 3.0~5.0V, 2A power supply Audio source (i.e. MP3 player, Notebook PC, etc.) 8Ω or 4Ω speakers ABSOLUTE MAXIMUM RATINGS ≤ 5.0V power supply Caution: Do not exceed the conditions listed above, otherwise the board will be damaged. PROCEDURE The IS31AP2036 demo board is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) 2) 3) 4) 5) 6) Connect a 4Ω (or larger) speaker across the OUTterminal and OUT+ terminal or the RCA female connector (AUDIO OUT). Connect the ground terminal of the power supply to the GND (TP1) and the positive terminal to the VCC (TP2). Or connect DC power to connector (DC IN) with a 2.5 mm Jack. If the audio source is differential, remove jumper JP2, connect the negative of the audio source to the IN- terminal, and connect the positive of the audio source to IN+ terminal. If the audio source is single-ended, connect the audio source to the IN+ terminal, and close jumper JP2; or connect audio source to the audio mono connector (AUDIO IN) and close jumper JP2. Turn on the audio source. Turn on the power supply Figure 1: Photo of IS31AP2036 Evaluation Board Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 03/10/2015 1 IS31AP2036 HIGH EFFICIENCY, CLASS-K AUDIO POWER AMPLIFIER WITH INTEGRATED CHARGE PUMP CONVERTER ORDERING INFORMATION Part No. Temperature Range Package IS31AP2036-CLS2-EB -40°C ~ +85°C (Industrial) FCQFN-16, Lead-free Table 1: Ordering Information For pricing, delivery, and ordering information, please contact ISSI’s analog marketing team at [email protected] or (408) 969-6600. EVALUATION BOARD OPERATION GAIN SETTING The IS31AP2036 demo board has an LPC922 MCU to read the status of the button (K1) which select between the different modes. The current operating mode is indicated by the illuminated LED on the left side. The default mode is shutdown. The IS31AP2036 demo board is shipped with a gain of 16.4V/V, and is set by resistors RIN (RInternal (16.5kΩ) + RExternal (R7 or R8)).Change resistors R7 and R8 to reconfigure the gain of the board .Gain determined in Equation (1) Gain MODE SETTINGS The operating mode is controlled by Pulse Count Control (PCC wire) serial interface. The interface records rising edges of the SDB pin and decodes them into 4 operating mode as below. Mode 1 SDB Mode 2 SDB 320k RInternal RExternal V V (1) HIGH-PASS FILTER The evaluation board’s high-pass filter consists of the input capacitors CIN (C7 or C8) and RIN (RInternal (16.5kΩ) + Rexternal (R7 or R8)). The filter’s corner frequency, fC, is determined by Equation (2). 1 f c 2R C IN IN (2) Mode 3 SDB SHUTDOWN MODE Mode 4 SDB tHI tLO tOFF Shutdown Jumper (JP1) controls the shutdown pin of the IS31AP2036 IC. Connect the shunt across pin 1 and 2 of the jumper (JP1) to enter the shutdown mode of the board. SDB SDB Status Function 1 Pulse Mode1(NCN power 1.2W) RL= 8Ω 2 Pulse Mode2(NCN power 1.0W) RL= 8Ω 3 Pulse Mode3(NCN power 0.8W) RL= 8Ω 4 Pulse Mode4(NCN OFF) Pull low(1ms) Shutdown tHI and tLO are from 0.75μs to 10μs and 2μs is recommended. Switch modes: it should pull down the SDB pin low over tOFF (recommended 1ms) to shut down the IC and send pulse again to switch modes. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 03/10/2015 2 IS31AP2036 HIGH EFFICIENCY, CLASS-K AUDIO POWER AMPLIFIER WITH INTEGRATED CHARGE PUMP CONVERTER 2.2uF 2.2uF VCC C1P A3,B3 C3 1uF TP1 C6 D1 C1 U1 C1N VCC D2 C5 C1 10uF C2 0.1uF C2P VCC C2N CON1 DC IN B1,B2 TP2 D3 PVCC C4 TP3 4.7uF C7 15nF R7 A1 3K IN- C8 15nF R8 CON3 B4 OUT+ A2 OUT+ IN- 3K SDB A4 TP4 TP6 IN+ SDB JP2 CLOSE=SE D4 OUT- GND IN+ OUTAUDIO OUT TP5 JP1 IS31AP2036 C2,C3,C4 CON2 AUDIO IN CLOSE=SD R10 0R U2 VCC VCC LED4 1 LED3 2 RST 4 P0.0 P1.7 RST VDD P0.1 P0.2 R9 100K 3 8 9 K1 10 6 7 5 P0.6 P1.6 P0.4 INT1/P1.4 P0.5 INT0/P1.3 P0.3 15 T1/P0.7 TXD/P1.0 RXD/P1.1 3 C9 1uF 20 LED1 2 VDD 5 VOUT SD GND 4 BP 10nF PAM3101 14 17 P0.4 16 P0.5 18 SDB 13 12 11 LPC922 C11 1uF C10 19 LED2 T0/P1.2 OSC1 OSC2 GND 3V 1 3V U3 R6 NC R5 100K LED4 R1 1K LED3 R2 1K D3 Mode3 LED2 R3 1K D2 Mode2 LED1 R4 1K D1 Mode1 VCC 3V D4 Mode4 TP7 3V P0.5 P0.4 RST GND 5 4 3 2 1 ICP Figure 2: IS31AP2036 Application Schematic Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 03/10/2015 3 IS31AP2036 HIGH EFFICIENCY, CLASS-K AUDIO POWER AMPLIFIER WITH INTEGRATED CHARGE PUMP CONVERTER BILL OF MATERIALS Name Symbol Amplifier U1 LDO Description Qty Supplier Part No. Class-K audio amplifier 1 ISSI IS31AP2036-CLS2-TR U2 Low-dropout regulator 1 PAM PAM3101 MCU U3 Microcontroller 1 NXP LPC922 LED D1~D4 LEDs Blue, SMD 4 Everlight 19-217/BHC-ZL1M2RY/3T Resistor R1~R4 RES,1K,1/16W,±5%,SMD 4 Yageo RC0603JR-071KL Resistor R5,R9 RES,100K,1/16W,±5%,SMD 2 Yageo RC0603JR-07100KL Resistor R7,R8 RES,3K,1/16W,±1%,SMD 2 Yageo RC0603FR-073KL Resistor R10 RES,0R,1/16W,±5%,SMD 1 Yageo RL0603JR-070KL Resistor R6 NC Capacitor C1 CAP,10µF,10V,±10%,SMD 1 Yageo CC0805KRX7R6BB106 Capacitor C3,C9,C11 CAP,1µF,50V,±10%,SMD 3 Yageo CC0805KRX7R9BB105 Capacitor C2 CAP,0.1µF,50V,±10%,SMD 1 Yageo CC0603KRX7R9BB104 Capacitor C9,C11 CAP,0.1µF,50V,±10%,SMD 2 Yageo CC0805KRX7R9BB104 Capacitor C10 CAP,10nF,50V,±10%,SMD 1 Yageo CC0603KRX7R8BB103 Button K1 Button SMD 1 Connector DC IN 2.5mm DC JACK 1 Connector AUDIO OUT RCA type plugs 1 Connector AUDIO IN 3.5mm min plug 1 TP1~TP6 TP1~TP6 Test pins 6 Bill of materials refers to Figure 2 above. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 03/10/2015 4 IS31AP2036 HIGH EFFICIENCY, CLASS-K AUDIO POWER AMPLIFIER WITH INTEGRATED CHARGE PUMP CONVERTER 0 0 2 2 1 1 2 2 2 1 2 1 1 2 2 1 1 2 2 1 1 2 0 1 2 0 0 0 Figure 3: Board Component Placement Guide - Top Layer Figure 4: Board PCB Layout - Top Layer Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 03/10/2015 5 IS31AP2036 HIGH EFFICIENCY, CLASS-K AUDIO POWER AMPLIFIER WITH INTEGRATED CHARGE PUMP CONVERTER 0 0 2 2 1 1 2 2 2 1 2 1 1 2 2 1 1 2 2 1 1 2 0 1 2 0 0 0 Figure 5: Board Component Placement Guide - Bottom Layer Figure 6: Board PCB Layout - Bottom Layer Copyright © 2015 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and before placing orders for products. Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that: a.) the risk of injury or damage has been minimized; b.) the user assume all such risks; and c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 03/10/2015 6