IS31AP2110 20W Stereo Class-D Audio Amplifier with Power Limit And Dynamic Temperature Control DESCRIPTION RECOMMENDED EQUIPMENT The IS31AP2110 is a high efficiency stereo class-D audio amplifier with adjustable power limit function and dynamic temperature control. The evaluation board operates from a single 8~26V supply voltage and can deliver 20W/CH into an 8 loudspeaker without the need for an external heat sink. It supports parallel BTL mode to deliver 40W into a 4 loudspeaker with 0.11% THD+N. The adjustable power limit function allows the user to set a voltage rail lower than half of 3.3V to limit the amount of current through the speaker. 8~26V, 3A power supply Audio source with 3.5mm mini plug Pair of speakers (4Ω or 8Ω) with RCA-type plugs ABSOLUTE MAXIMUM RATINGS ≤ 26V power supply ≥ 4Ω and ≤ 8Ω speaker Caution: Do not exceed the conditions listed above; otherwise the board will be damaged. PROCEDURE FEATURES Single supply voltage - 8V ~ 26V board operation - Built-in 3.3V LDO 87% efficient Class-D operation eliminates need for heat sink Board Selectable settings Four user selectable gain settings PBTL or BTL mode Auto recovery mode Adjustable power limit function for speaker protection (requires potentiometer VR1) IS31AP2110 IC features Short-Circuit protection with auto recovery option Under-voltage detection Over-voltage protection Pop noise and click noise reduction Over temperature protection with auto recovery Dynamic temperature control prevents chip from over heating QUICK START Figure 1: Photo of IS31AP2110Evaluation Board Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/20/2014 The IS31AP2110 demo board is fully assembled and tested. Follow the steps listed below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) 2) 3) 4) 5) 6) With JP3 = L, connect a pair of 4Ω (or 8Ω) speakers to the SPKR RCA Jack (ROUT connector) and SPKL RCA Jack (LOUT connector). Connect the power supply ground to the GND terminal and positive to the VCC terminal or connect a power jack to CON2. If the audio is stereo, connect audio source to the audio connector (3.5mm) and close jumpers JP4 and JP5, default is closed. If the audio source is differential, connect the audio source to LINP/LINN terminals (left channel) and RINP/RINN terminals (right channel). JP4 and JP5 jumpers should be open. Turn on the power supply. Turn on the audio source. PERFORMANCE DESCRIPTION There are five configuration jumpers to enable the following IC functions: 1) JP8 - Enable/disable the IC. Jumper is closed to H is enable, closed to L to disable. When JP8 is closed to H and JP6 is closed, the short-circuit auto recovery function is enabled. 2) JP3–Enable/disable PBTL (MONO) Mode. Jumper J3 closed to L is BTL Mode. Jumper J3 closed to H is PBTL Mode. If PBTL jumper is set to H (PBTL mode), the Left outputs (OUTPL and OUTNL) as well as the Right outputs (OUTPR and OUTNR) are synchronized and in phase. This allows the connection of OUTPL to OUTNL and OUTPR to OUTNR. 3) JP1 and JP2 – Output Gain Selection. Four gain levels can be selected based on the table below. JP1=L JP2=L JP1=L JP2=H JP1=H JP2=L JP1=H JP2=H 20dB 26dB 32dB 36dB 1 IS31AP2110 20W Stereo Class-D Audio Amplifier with Power Limit And Dynamic Temperature Control 4) Power limit adjustment: add a potentiometer (100K) VR1 from PLIMIT pin to ground to adjust the output voltage limit. The voltage Vplimit sets a limit on the output peak-to-peak voltage. The maximum BTL output voltage of the gain control amplifier is limit to 2*(1.55v-Vplimit), The Class-D BTL output voltage on loudspeaker is amplified by 9.95 of 2*(1.55V-Vplimit), - VIN is the input peak voltage. - Gv is the gain of gain control amplifier, the four gain levels are 1V/V, 2V/V, 4V/V, 6.34V/V, corresponding to 20dB, 26dB, 32dB, 36dB overall gain. -Vplimit>1.55V or Vplimit=GND are all without power limit feature. For normal BTL operation (Stereo) and PBTL (Mono) operation: POUT 2 VP 9.95 2 RL 2 for unclipped power (1) Where: - VP is the peak voltage of gain control amplifier output if (VIN×Gv /2) < (1.55V–VPLIM), then VP = (VIN×Gv /2). 5) Please refer to the IS31AP2110 datasheet for additional device information. if (VIN×Gv/2) > (1.55V–VPLIM), then VP = (1.55V–VPLIM). Jumper Setting Table Jumper JP1 (GAIN1), JP2 (GAIN0) Options Select between four amplifier gain levels JP3 (PBTL) Enable/Disable PBTL JP4 (LINN) JP5 (RINN) JP6 JP8 Single ended audio input Setting (note: Jumper on “H” for logic 1, on “L” for logic 0) JP1 – JP2 0 - 0 : 20dB Gain 0 - 1 : 26dB Gain 1 - 0 : 32dB Gain 1 - 1 : 36dB Gain 0 - BTL mode 1 - PBTL mode (Parallel BTL) Insert header to ground unused negative audio line input Auto-Recovery enable Audio amp shutdown Insert header to enable auto-recovery of short circuit faults H (1) – outputs enabled L (0) – outputs Hi-Z ORDERING INFORMATION Part No. Temperature Range Package IS31AP2110-ZLS2-EB -40°C to +85°C (Industrial) TSSOP-28, Lead-free Table 1: Ordering Information For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing team at [email protected] or (408) 969-6600. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/20/2014 2 IS31AP2110 20W Stereo Class-D Audio Amplifier with Power Limit And Dynamic Temperature Control PVCC H PVCC R7 R3 100K 100K U1 3 SD 2 L 24V-JACK 1 1 JP8 C25 VCCL VCCL JP6 2 100uF/35V CON2 SDB BEAD 28 27 C12 AVDD FAULTB JP1 H GND L JP2 100K H 3 2 R2 GAIN1 1 NC 5 GAIN0 1 6 PLMIT C2 GAIN1 OUTL+ 1uF 3 C3 1uF 4 OUTL- RINN C4 C5 RINP 1uF 1uF PVCC R4 100K H INL- 11 12 RINPP1 14 INROUTR+ INR+ PBTL NC VCCR VCCR R8 24 C13 23 R12 0R L7 NC BEAD NC NC R10 NC C19 NC NC 20 L4 19 NC BEAD C16 NC R9 NC C20 NC C17 18 L6 17,21,22,26 16 15 1 2 CON3 1 2 0R L8 MONO ROUT L10 NC R13 BEAD SPK L LOUT 0R R15 NC C23 NC L9 NC R14 R11 NC C15 C21 NC C18 NC C24 NC C22 NC NC SPK R 1 2 CON4 0R BEAD PVCC C10 0.1uF C9 1nF 3 2 L L5 L3 BEAD PGND JP5 VR1 INL+ OUTR- AUDIO IN NC C14 C1 JP4 LINN R5 25 LINPP1 NC CON1 10 GAIN0 PGND LINP 100uF/35V R6 10K 1uF 8 100K 3 2 L AGND L1 9 C6 R1 C7 0.1uF 1nF FAULTB PVCC PVCC C11 C8 L2 100uF/35V IS31AP2110 1 JP3 Figure 2: IS31AP2110 Application Schematic BILL OF MATERIALS Name Symbol Audio Amplifier U1 Resistors Description Qty Supplier Part No. Class-D Audio Amplifier 1 ISSI IS31AP2110 R1~R3,R7 RES,100K,1/16W,±5%,SMD 4 Yageo RC0603JR-07100KL Resistor R6 RES,10K,1/16W,±5%,SMD 1 Yageo RC0603JR-0710KL Resistors R12~R15 RES,0R,1/10W,±5%,SMD 4 Yageo RL0805JR-0700KL Capacitors C10,C11, CAP,0.1µF,16V,±20%,SMD 2 Yageo CX0603MRX7R7BB104 Capacitors C12,C9 CAP, 1nF,16V,±20%,SMD 2 Yageo CX0603MKX7R7BB102 Capacitors C1,C3~C6 CAP, 1µF,16V,±20%,SMD 5 Yageo CX0603MKX7R7BB105 Capacitors C7,C8,C25 CAP,100µF,35V,±20%,SMD 3 Bead L1~L6 BEAD,80ohm/100MHZ,SMD 6 Yageo UPB321611T-800Y–S Connector CON2 2.5mm DC connector 1 Connector CON1 3.5mm min plug 1 connector CON3,CON4 RCA –type plugs 2 Headers J1,J2,J3,J8 3 pin headers 4 Headers J4,J5,J6 2 pin headers 4 Headers LOUT,ROUT, MONO 2 pin headers 3 Table 2: Bill of Materials, refers to Figure 2 above. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/20/2014 3 IS31AP2110 20W Stereo Class-D Audio Amplifier with Power Limit And Dynamic Temperature Control Figure 3: Board Component Placement Guide -Top Layer Figure 4: Board PCB Layout- Top Layer Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/20/2014 4 IS31AP2110 20W Stereo Class-D Audio Amplifier with Power Limit And Dynamic Temperature Control Figure 5: Board Component Placement Guide -Bottom Layer Figure 6: Board PCB Layout-Bottom Layer Copyright © 2014 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, 07/20/2014 5