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PAM8902ZER-P

PAM8902ZER-P

  • 厂商:

    BCDSEMI(美台)

  • 封装:

    16-WFBGA,WLCSP

  • 描述:

    IC AMP AUD 30VPP CLASS D 16WCSP

  • 数据手册
  • 价格&库存
PAM8902ZER-P 数据手册
A Product Line of Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN USE PAM8902H PAM8902 30-VPP MONO CLASS-D AUDIO AMPLIFIER FOR PIEZO/CERAMIC SPEAKERS Description Pin Assignments The PAM8902 is a mono, Class-D audio amplifier with integrated boost converter designed for piezo and ceramic speakers.The PAM8902 is capable of driving a ceramic/piezo speaker with 30VPP(10.6Vrms) from a 3.6V power supply.The PAM8902's Boost converter operates at a fixed frequency of 1.5MHz, and provides a 17.5V supply with a minimum number of external components. PAM8902 features an integrated audio low pass filter that rejects high frequency noise thus improving audio fidelity. And three gain modes of 18dB, 22dB and 26dB for ease of use. PAM8902 also provides thermal, short, under- and over-voltage protection. The PAM8902 is available in a 16-ball 1.95mm x 1.95mm CSP package and 16-pin QFN4x4 package. Features   Supply Voltage Range From 2.5V to 5.5V 30 VPP Output Load Voltage From a 2.5V Supply         Integrated Boost Converter Generates 17.5V Supply Programmable Soft-Start Small Boost Converter Inductor Selectable Gain of 18dB, 22dB, and 26dB Selectable Boost Output Voltage of 8V, 12V and 17.5V Low Shutdown Current: < 1µA Built-in Thermal, OCP, OVP, Short Protection Available in Space Saving Packages:  16-ball 1.95mmx1.95mm CSP Package  16-pin QFN4x4 Package Applications      Wireless or Cellular Handsets Portable DVD Player Personal Digital Assistants (PDAs ) Electronic Dictionaries Digital Still Cameras PAM8902 Document number: DS36454 Rev. 2 - 3 1 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Typical Applications Circuit Pin Descriptions Pin Name PVCC VOUT SW PGND1 OUT+ VSET COMP AVDD OUTGSET VCM AGND PGND2 ENA INN INP Bump (CSP) A1 A2 A3 A4 B1 B2 B3 B4 C1 C2 C3 C4 D1 D2 D3 D4 Pin Number QFN4x4 16 1 2 4 15 3 5 6 14 11 7 8 13 12 10 9 PAM8902 Document number: DS36454 Rev. 2 - 3 Function Audio Amplifier Power Supply Boost Converter Output Boost Converter Switching Node Boost Converter Power Ground Positive Differential Audio Output Boost Converter Output Voltage Setting(8V,12V,17.5V) Boost Converter Compensation Power Supply Negative Differential Audio Output Amplifier Gain Setting ( 18dB , 22dB , 26dB) Common Mode Bypass Cap Analog Ground ClassD Power Ground Whole Chip Enable Negative Differential Audio Input Positive Differential Audio Input 2 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Functional Block Diagram Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground. Parameter Supply Voltage Input Voltage Maximum Junction Temperature Storage Temperature Soldering Temperature Rating 6.0 -0.3 to VDD +0.3 +150 -65 to +150 350, 10sec Unit V °C Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Parameter Supply Voltage Range Ambient Temperature Range Junction Temperature Range PAM8902 Document number: DS36454 Rev. 2 - 3 Rating 2.5 to 5.5 -40 to +85 -40 to +125 Unit V °C °C 3 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Thermal Information Parameter Thermal Resistance (Junction to Ambient) Thermal Resistance (Junction to Case) Electrical Characteristics Parameter Input Voltage Quiescent Current Package CSP QFN4x4-16 CSP QFN4x4-16 Symbol θJA θJC Max 90 52 75 30 Unit °C/W (@TA = +25°C, VDD = 3.6V, CL = 1µF, VSET Float, unless otherwise specified.) Symbol Test Conditions IQ Min Typ 2.5 VDD Max Units 5.5 V EN > 1.2V, VSET = High 30 48 EN > 1.2V, VSET = Floating 10 18 EN > 1.2V, VSET = GND 5 12 1 Shutdown Current ISD EN = 0V 0.1 Wake-Up Time TWU EN from Low to High 40 Chip Enable VEH Chip Disable VEL GSET/ VSET High VH VDD -0.5 VDD GSET/ VSET Floating VF 1 VDD -1 VL UVLO UVLO(H) OTP OTP(H) 0 0.5 GSET/ VSET Low Under Voltage Lockout Threshold Under Voltage Lockout Hysteresis Thermal Shutdown Threshold Thermal Shutdown Lockout Hysyeresis µA mS 1.2 0.4 VDD from High to Low VDD from Low to High mA 2.2 0.2 150 30 V V V °C °C Boost Converter Output Voltage V O1 VSET = GND, No Load 7.2 8 8.8 V V O2 VSET = NC, No Load 10.8 12 13.2 V 16 17.5 19 V V O3 VSET = AVDD, No Load Current Limit CL Average Input Current 0.8 A Lowside MOSFET RDS(ON) RLS IO = 50mA 0.5 Ω Boost Switching Frequency fOSCB 1.1 1.5 1.9 MHz 225 375 475 KHz Class D Class D Amplifier Switching Frequency fOSCD Common Mode Reject Ratio CMRR Output Offset Voltage RDS(ON) Closed-Loop Voltage Gain Input AC-GND 60 VIN = + -100mV, VDD = 3.6V 5 dB VOS Output Offset Voltage RP High Side Low Side 50 AV1 GSET = AVDD, VO = 1VRMS 25 26 27 AV2 GSET = NC, VO = 1VRMS 21 22 23 AV3 GSET = GND, VO = 1VRMS 17 18 19 mV Ω Ω 1.5 0.6 dB Power Supply Reject Ratio PSRR 200m VPP Supply Ripple @ 217Hz 70 Total Harmonic Distortion Plus Noise THD+N VO = 5VRMS Input AC Ground, A–Weighting 0.3 % 90 dB Signal to Noise Ratio PAM8902 Document number: DS36454 Rev. 2 - 3 SNR 4 of 13 www.diodes.com dB September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Typical Performance Characteristics (@TA = +25°C, VDD = 4.2V, Gain = 26dB, CIN = 1µF, CLOAD = 1µF, unless otherwise specified.) PAM8902 Document number: DS36454 Rev. 2 - 3 5 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Typical Performance Characteristics (cont.) (@TA = +25°C, VDD = 5V, Gain = 18dB, unless otherwise specified.) PAM8902 Document number: DS36454 Rev. 2 - 3 6 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Application Information Select Boost Converter Output Voltage Customer can use VSET pin to set boost converor output voltage between 8V, 12V and 17.5V. VSET pin configuration table as below: VSET Pin Configuration Min Max PVCC Voltage Audio Amplifier Maximum Output Voltage Connect to AVDD AVDD – 0.5 AVDD 17.5V 11 VRMS (VPP = 31.1V) Floating 1V AVDD – 1V 12V 8 VRMS (VPP = 22.6V) Connect to GND GND 0.5V 8V 5 VRMS (VPP = 14.1V) Input Resistance (RI) The input resistors (RI = RIN + REX) set the gain of the amplifier according to Equation 1 when anti-saturation is inactive. G = 20 Log [12.8*RF/ (RIN + REX)] (dB) GSET RIN RFB 77.4kΩ 122.6kΩ GSET = VDD GSET = Floating 100kΩ 100kΩ GSET = GND 122.6kΩ 77.4kΩ Where RIN is a 77.4KΩ internal resistor, REX is the external input resistor, RF is a 122.6KΩ internal resistor. Resistor matching is very important in fully differential amplifiers. The balance of the output on the reference voltage depends on matched ratios of the resistors. CMRR, PSRR, and cancellation of the second harmonic distortion diminish if resistor mismatch occurs. Therefore, it is recommended to use 1% tolerance resistors or better to keep the performance optimized. Matching is more important than overall tolerance. Resistor arrays with 1% matching can be used with a tolerance greater than 1%. Place the input resistors very close to the PAM8902 to limit noise injection on the high-impedance nodes. For optimal performance the gain should be set to lower. Lower gain allows the PAM8902 to operate at its best, and keeps a high voltage at the input making the inputs less susceptible to noise. In addition to these features, higher value of RI minimizes pop noise. Input Capacitors (CI) In the typical application, an input capacitor, CI, is required to allow the amplifier to bias the input signal to the proper DC level for optimum operation. In this case, Ci and the minimum input impedance RI form is a high-pass filter with the corner frequency determined in the follow equation: FC  1 2 RI CI It is important to consider the value of CI as it directly affects the low frequency performance of the circuit. For example, when RI is 150k and the specification calls for a flat bass response are down to 150Hz. Equation is reconfigured as followed: CI  1 2 RIFC When input resistance variation is considered, the CI is 7nF, so one would likely choose a value of 10nF. A further consideration for this capacitor is the leakage path from the input source through the input network (CI, RI + RF) to the load. This leakage current creates a DC offset voltage at the input to the amplifier that reduces useful headroom, especially in high gain applications. For this reason, a low-leakage tantalum or ceramic capacitor is the best choice. When polarized capacitors are used, the positive side of the capacitor should face the amplifier input in most applications as the DC level is held at VDD /2, which is likely higher than the source DC level. Please note that it is important to confirm the capacitor polarity in the application. PAM8902 Document number: DS36454 Rev. 2 - 3 7 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Application Information Decoupling Capacitor The PAM8902 is a high-performance CMOS audio amplifier that requires adequate power supply decoupling to ensure the output total harmonic distortion (THD) as low as possible. The optimum decoupling is achieved by using two different types of capacitors that target on different types of noise on the power supply leads. For higher frequency transients, spikes, or digital hash on the line, a good low equivalent series-resistance (ESR) ceramic capacitor, typically 1µF is placed as close as possible to the device AVDD pin for the best operation. For filtering lower frequency noise signals, a large ceramic capacitor of 10µF or greater placed near the AVDD supply trace is recommended. External Schottky Diode Use external schottky diode can get the best driving capability and efficiency. Since internal power diode has limited driving capability, only in following conditions customer can remove the external schottky diode to reduce the cost. 1. VSET = GND or Floating and CL less than 1µF. 2. The signal frequency less than 4KHz. 3. Haptic application (50-500Hz) Shutdown Operation In order to reduce power consumption while not in use, the PAM8902 contains shutdown circuitry amplifier off when a logic low is placed on the ENA pin. By switching the ENA pin connected to GND, the PAM8902 supply current draw will be minimized in idle mode. Under-Voltage Lock-Out (UVLO) The PAM8902 incorporates circuitry designed to detect supply voltage. When the supply voltage drops to 2.2V or below, the PAM8902 goes into a state of shutdown, and the device comes out of its shutdown state and restore to normal function only when reset the power supply or ENA pin. Short-Circuit Protection (SCP) The PAM8902 has short circuit protection circuitry on the outputs to prevent the device from damage when output-to-output shorted or output-toGND shorted occurs. When a short circuit occurs, the device goes into a latch state and must be reset by cycling the voltage on the ENA pin to a logic low and then back to the logic high state for normal operation. This will clear the short-circuit flag and allow for normal operation if the short was removed. If the short was not removed, the protection circuitry will again activate. Over-Temperature Protection (OTP) Thermal protection on the PAM8902 prevents the device from damage when the internal die temperature exceeds +150°C. There is a +15°C tolerance on this trip point from device to device. Once the die temperature exceeds the set point, the device will enter the shutdown state and the outputs are disabled in this condition both OUT+ and OUT- will become high impedance. This is not a latched fault. The thermal fault is cleared once the temperature of the die decreased by +30°C. This large hysteresis will prevent motor boating sound well and the device begins normal operation at this point with no external system interaction. PAM8902 Document number: DS36454 Rev. 2 - 3 8 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Ordering Information PAM8902 X X X - P Pin Configuration Package Type Number of Pins PAM Confidential R: 16 Part Number Part Marking BG YW P8902 XXXYW PAM8902ZER-P PAM8902KER-P Package Type Standard Package CSP-16L 3000Units/Tape&Reel QFN4x4-16L 3000Units/Tape&Reel Marking Information Y: Last Digital of Manufacturing Year 6: 2006 7: 2007 8: 2008 9: 2009 0: 2010 1: 2011 W: Week Code Item 1 2 3 4 5 6 7 8 9 10 11 12 13 Week Code A B C D E F G H I J K L M PAM8902 Document number: DS36454 Rev. 2 - 3 Item 14 15 16 17 18 19 20 21 22 23 24 25 26 Week Code N O P Q R S T U V W X Y Z Item 27 28 29 30 31 32 33 34 35 36 37 38 39 9 of 13 www.diodes.com Week Code A B C D E F G H I J K L M Item 40 41 42 43 44 45 46 47 48 49 50 51 52 Week Code N O P Q R S T U V W X Y Z September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Marking Information (cont.) PAM8902 Document number: DS36454 Rev. 2 - 3 10 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Package Outline Dimensions (All dimensions in mm.) CSP-16 PAM8902 Document number: DS36454 Rev. 2 - 3 11 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 Package Outline Dimensions (cont.) (All dimensions in mm.) QFN4x4-16 PAM8902 Document number: DS36454 Rev. 2 - 3 12 of 13 www.diodes.com September 2016 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8902 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2012, Diodes Incorporated www.diodes.com PAM8902 Document number: DS36454 Rev. 2 - 3 13 of 13 www.diodes.com September 2016 © Diodes Incorporated
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