PAM8905PZR

NOT RECOMMENDED FOR NEW DESIGN USE PAM8945 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC Description PAM8905 Pin Assignments The PAM8905 is a high efficiency Class-D audio power amplifier with an integrated boost converter. It drives up to 1.9W (1% THD+N) into an 8Ω speaker. With 85% typical efficiency, the PAM8905 helps extend battery life when playing audio. 1 The built-in boost converter generates the voltage rail for the output stage. This provides a louder audio output than a stand-alone amplifier connected directly to the battery. It also maintains a consistent loudness, regardless of battery voltage. 2 3 A PVDD SW BGND B OUT + AGC VBAT C OUT- EN IN+ D PGND AGND IN- The PAM8905 features battery tracking AGC function which adjusts the Class-D gain to limit battery current at lower battery voltage. (TOP VIEW) PAM8905 features DC input protection and all outputs are fully protected against output-to-output shorts. The PAM8905 is available in U-WLB1520-12 package. Features Applications                  Built-In Battery Tracking Automatic Gain Control (AGC) High Efficiency Integrated Boost Converter Over 85% 1.9W into an 8Ω Load from a 3.6V Supply Operates from 2.8V to 5.2V Efficient Class-D Prolongs Battery Life Minimized ON/OFF Pop Noise Superior Low Noise High PSRR DC Input Protection Auto-Recovery Short-Circuit Protection Thermal Shutdown Available in U-WLB1520-12 Package Cell Phones PDA GPS Portable Electronics Speakers Typical Applications Circuit 2.8V to 5.2V V BAT 10uF 2.2uH V BAT SW EN IN+ Audio Input INAGC PAM8905 Document number: DS37026 Rev. 3 - 3 AGC AGND 1 of 9 www.diodes.com PVDD 10uF~22uF AGND OUT+ OUTPGND September 2020 © Diodes Incorporated 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC PAM8905 Pin Descriptions Pin Name Pin Number Description PVDD A1 Boost Converter Output and Class D Amplifier Power Supply OUT+ B1 Amplifier Positive Audio Output OUT- C1 Amplifier Negative Audio Output PGND D1 Class-D Power Ground SW A2 AGC B2 EN C2 AGND D2 Boost Convertor Switching AGC Inflection Point Select Connect to VBAT, GND or Float. Voltage at AGC pin is only read at device power-up. A power cycle is required to change inflection points. Device Enable Set to logic high to enable Analog Ground BGND A3 Boost Converter Power Ground VBAT B3 Supply Voltage IN+ C3 Positive Audio Input IN- D3 Negative Audio Input Block Diagram V BAT EN Bias SW IN+ AGC PVDD Boost Convertor + PWM Modulator - IN- Gate Drive OUT+ Gate Drive OUT- SCP OTP DCP UVLO AGC VREF OSC AGND PAM8905 Document number: DS37026 Rev. 3 - 3 BGND 2 of 9 www.diodes.com Startup Protection PGND September 2020 © Diodes Incorporated 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC PAM8905 Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) VALUE UNIT –0.3 to 6.0 V –0.3 to VBAT + 0.3 V VBAT Supply voltage VI Input voltage, EN, IN+, IN–, AGC TA Operating free-air temperature range –40 to 85 °C TJ Operating junction temperature range –40 to 150 °C Tstg Storage temperature range –65 to 150 °C Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) VBAT Supply voltage VIH High-level input voltage VIL Low-level input voltage TA Operating free-air temperature MIN MAX UNIT 2.8 5.2 V EN 1.3 VBAT V EN GND 0.6 V –40 85 °C Thermal Information Parameter Thermal Resistance (Junction to Ambient) PAM8905 Document number: DS37026 Rev. 3 - 3 Symbol Package Maximum Unit JA U-WLB1520-12 85 °C/W 3 of 9 www.diodes.com September 2020 © Diodes Incorporated 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC Electrical Characteristics Symbol VBAT Po PAM8905 (@VBAT=3.6V, AGC=GND, TA = +25°C, RL=8Ω+33µH, unless otherwise specified.) Parameter Test Conditions MIN TYP MAX UNIT 2.8  5.2 V VBAT=3.6V  1900  VBAT=3.0V  1750  VBAT=2.8V  1600   0.07   0.15  f=217Hz  -70  f=1kHz  -70  Supply Voltage Output Power THD+N=1%,f=1kHz mW Total Harmonic Distortion Plus Noise Po=1.0W,RL=8Ω Power Supply Ripple Rejection VBAT=3.6V, Inputs ACGrounded with C=1μF SNR Signal-to-Noise Ratio A-Weighting THD+N=1%  95  dB Vop Peak Output Voltage Boost Convertor Auto-Pass Through Threshold VBAT=3.6V f=1kHz  5.75  V   2  Vpk Output Noise Inputs AC-Grounded No A-Weighting  100  A-Weighting  60  η Efficiency VBAT=4.2V, Po=1.5W f=1kHz  85  % IQ Quiescent Current VBAT=3.6V No Load  4  mA Isd Shutdown Current VBAT=2.8V to 5.2V EN=0V   1 μA High Side PMOS,I=500mA VBAT=5V  260  mΩ Low Side NMOS,I=500mA VBAT=5V  160  mΩ Boost  1200  Class D  300    20  dB THD+N PSRR Vo_TH Vn Rdson fsw Static Drain-to Source OnState Resistor Switching Frequency f=1kHz Po=2W,RL=4Ω  % dB VBAT=2.8V to 5.2V  μV kHz Gv Closed-Loop Gain RIN Input Impedance Av=20dB   24  KΩ Vos Output Offset Voltage Input AC-Ground    10 mV Convertor SW Peak Current VBAT=3.6V   2  A   6  mS Ipeak  Ton Start-up Time From EN VIH EN Input High Voltage VBAT=5V  1.3 VIL EN Input Low Voltage VBAT=5V   PAM8905 Document number: DS37026 Rev. 3 - 3 4 of 9 www.diodes.com    0.6 V September 2020 © Diodes Incorporated 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC PAM8905 Performance Characteristics (@VBAT=3.6V, AGC=GND, TA = +25°C, RL=8Ω+33µH, unless otherwise specified.) THD+N Vs. Output Power (RL=8Ω) THD+N Vs. Output Power (RL=4Ω) 20 20 f=100Hz/1kHz/10kHz 10 (Red/Pink/Blue) 10 5 5 2 2 1 1 % f=100Hz/1kHz/10kHz (Red/Pink/Blue) % 0.5 0.5 0.2 0.2 0.1 0.1 0.05 0.05 0.02 0.02 0.01 1m 0.01 1m 2m 5m 10m 20m 50m 100m 200m 500m 1 2 2m 5m 10m 20m 4 50m 100m 200m 500m 1 2 5 8 W W THD+N Vs. Frequency (RL=8Ω) THD+N Vs. Frequency (RL=4Ω) 10 5 10 Po=0.3W/0.5W/1W (Red/Pink/Blue) 5 2 2 1 % Po=0.3W/0.5W/1W (Red/Pink/Blue) 1 0.5 % 0.2 0.5 0.2 0.1 0.1 0.05 0.05 0.03 20 50 100 200 500 1k 2k 5k 10k 20k 0.03 20 Hz 50 100 200 500 1k 2k 5k 10k 20k 5k 10k 20k Hz PSRR Vs. Frequency(RL=8Ω) +0 TT TT TT TTT -10 PSRR Vs. Frequency(RL=4Ω) +0 TT TT TT TTT TT T TT -10 AGC=GND -20 -20 -30 -30 -40 -40 -50 d B -50 d B -60 -60 -70 -70 -80 -80 -90 -90 -100 -100 -110 20 AGC=GND 50 100 200 500 1k 2k 5k 10k 20k Hz PAM8905 Document number: DS37026 Rev. 3 - 3 -110 20 50 100 200 500 1k 2k Hz 5 of 9 www.diodes.com September 2020 © Diodes Incorporated 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC PAM8905 Performance Characteristics (@VBAT=3.6V, AGC=GND, TA = +25°C, RL=8Ω+33uH, unless otherwise specified.) Noise Floor (RL=8Ω) Gain Vs. Supply Voltage +0 -10 -20 -30 -40 d B r -50 A -70 -60 Vin=50mVrms AGC=Float/GND/VBAT (Red /Blue/Green) -80 -90 -100 -110 -120 20 50 100 200 500 1k 2k 5k 10k 20k Hz Efficiency Vs. Output Power (RL=8Ω) Quiescent Current Vs. Supply Voltage Start-Up PAM8905 Document number: DS37026 Rev. 3 - 3 Shutdown 6 of 9 www.diodes.com September 2020 © Diodes Incorporated 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC PAM8905 Ordering Information PAM8905 X X X Pin Configuration P: 12 Pin Package Type Z: U-WLB1520-12 Shipping Package R: Tape & Real Part Number Package Standard Package PAM8905PZR U-WLB1520-12 3,000Units/Tape & Reel Marking Information U-WLB1520-12 FS: Product Code Y: Year W: Week PAM8905 Document number: DS37026 Rev. 3 - 3 7 of 9 www.diodes.com September 2020 © Diodes Incorporated 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC PAM8905 Package Outline Dimensions (All dimensions in mm.) Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. D b Ø(12x) SE Pin #1 ID U-WLB1520-12 Dim Min Max Typ A 0.500 0.600 0.550 A1 0.185 0.235 0.210 A2 0.315 0.365 0.340 b 0.208 0.308 0.258 D 1.420 1.500 -D2a 0.950 1.050 1.000 E 1.920 2.000 -E2a 1.450 1.550 1.500 e 0.500 BSC SD 0.250 BSC SE 0.000 BSC All Dimensions in mm e E E2a SD e D2a A2 A A SEATING PLANE Suggested Pad Layout Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. D Ø(12x) C Y1 Dimensions C D X Y Y1 Y C Value (in mm) 0.500 0.258 1.000 0.250 1.500 X PAM8905 Document number: DS37026 Rev. 3 - 3 8 of 9 www.diodes.com September 2020 © Diodes Incorporated 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC PAM8905 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 © 2020, Diodes Incorporated www.diodes.com PAM8905 Document number: DS37026 Rev. 3 - 3 9 of 9 www.diodes.com September 2020 © Diodes Incorporated