PAM8945 4.0W CLASS-G AUDIO AMPLIFIER WITH INTEGRATED BOOST CONVERTER AND BATTERY TRACKING AGC PROVISIONAL PRODUCT Description Pin Assignments (Top View) The PAM8945 is a high-efficiency Class-G audio power amplifier with an integrated boost converter. It drives up to 4.0W (10% THD+N) into a 4 speaker. With 85% typical efficiency, the PAM8945 helps extend battery life when playing audio. 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. The PAM8945 features battery tracking AGC function which adjusts the amplifier gain to limit battery current at lower battery voltage. SW 12 11 PVDD 1 10 VBAT OUT+ 2 9 AGC OUT- 3 8 EN PGND 4 7 IN+ 5 5 6 6 AGND IN- 5 The PAM8945 features DC input protection and all outputs are fully protected against output-to-output shorts. The PAM8945 is available in tiny W-QFN2030-12 package. 5 W-QFN2030-12 Features Applications Built-in Battery Tracking Automatic Gain Control (AGC) High-Efficiency Integrated Boost Converter Over 85% 4.0W into a 4 Load at 10% THD 3.2W into a 4 Load at 1% THD Operates from 2.8V to 5.2V Efficient Class-G 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 2.0mm x 3.0mm 12L W-QFN Package Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. "Green" Device (Note 3) Notes: BGND Cell Phones PDA GPS Portable Electronics Speakers 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated's definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green" products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. PAM8945 Document number: DS38267 Rev. 2 - 2 1 of 9 www.diodes.com June 2016 (c) Diodes Incorporated PAM8945 Typical Applications Circuit 2.2H 2.8V to 5.2V PROVISIONAL PRODUCT 100F + 10F 1F VBAT 10F SW PVDD PGND ON OFF EN OUT+ IN+ Audio Input IN- AGC AGC AGND OUTBGND Pin Descriptions Pin Number Pin Name Description 1 PVDD Boost Converter Output and Amplifier Power Supply 2 OUT+ Amplifier Positive Audio Output 3 OUT- Amplifier Negative Audio Output 4 PGND Power Ground 5 AGND Analog Ground 6 IN- Negative Audio Input 7 IN+ Positive Audio Input 8 EN Shutdown Terminal for the Chip 9 AGC AGC Setting Gain 10 VBAT Supply Voltage 11 SW 12 BGND PAM8945 Document number: DS38267 Rev. 2 - 2 Boost Convertor Switching Power Ground 2 of 9 www.diodes.com June 2016 (c) Diodes Incorporated PAM8945 Functional Block Diagram V BAT PROVISIONAL PRODUCT EN Bias SW PVDD Boos t Conv ertor IN+ + PWM Modulator AGC - IN- Gate Driv e OUT+ Gate Driv e OUT- SCP OTP DCP UVLO AGC VREF Startup Protec tion OSC AGND BGND PGND Absolute Maximum Ratings (@TA = +25C, unless otherwise specified.) Symbol VBAT Parameter Value Supply Voltage Unit -0.3 to 6.0 V VI Input Voltage, EN, IN+, IN-, AGC -0.3 to VBAT + 0.3 V TA Operating Free-air Temperature Range -40 to +85 C TJ Operating Junction Temperature Range -40 to +150 C Storage Temperature Range -65 to +150 C TSTG Recommended Operating Conditions (@TA = +25C, unless otherwise specified.) Symbol Parameter Min Supply Voltage Max Unit 2.8 5.2 V VIH High-Level Input Voltage EN 1.3 VBAT V VIL Low-Level Input Voltage EN GND 0.6 V TA Operating Free-Air Temperature -40 +85 C VBAT Thermal Information Symbol Parameter Package Max JA Thermal Resistance (Junction to Ambient) W-QFN2030-12 62 Jc Thermal Resistance (Junction to Case) W-QFN2030-12 11 PAM8945 Document number: DS38267 Rev. 2 - 2 3 of 9 www.diodes.com Unit C/W June 2016 (c) Diodes Incorporated PAM8945 Electrical Characteristics Symbol VBAT PROVISIONAL PRODUCT PO (@VBAT=3.6V, AGC=GND, TA = +25C, RL=4+33H, unless otherwise specified.) Parameter Supply Voltage Output Power Test Conditions Min Typ Max Unit -- 2.8 -- 5.2 V THD+N=10%, f=1kHz -- 4.0 -- W -- 3.2 -- W -- 0.07 -- -- 0.15 -- f=217Hz -- 70 -- f=1kHz -- 70 -- THD+N=1%, f=1kHz VBAT=3.6V THD+N Total Harmonic Distortion Plus Noise PO=1.0W, RL=8 PSRR Power Supply Ripple Rejection VBAT=3.6V, Input AC ground with C=1F f=10kHz -- 67 -- 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 -- V(PEAK) Output Noise Input AC-ground No A-weighting -- 100 -- A-weighting -- 60 -- Efficiency RL=8, PO=1W f=1kHz -- 86 -- % IQ Quiescent Current VBAT=3.6V No Load -- 4 -- mA ISD Shutdown Current VBAT=2.8V to 5.2V EN=0V -- -- 1 A Static Drain-to-Source OnState Resistor High Side PMOS, I=500mA Low Side NMOS, I=500mA VBAT=5V -- 260 -- m VBAT=5V -- 160 -- m Boost -- 1,200 -- Switching Frequency VBAT=2.8V to 5.2V Class D -- 300 -- VO_TH VN RDS(ON) fSW PO=2W, RL=4 f=1kHz % dB V kHz GV Closed-Loop Gain -- -- -- 20 -- dB RIN Input Impedance Av=20dB -- -- 24 -- K VOS Output Offset Voltage Input AC-ground -- -- -- 20 mV IPEAK Convertor SW Peak Current VBAT=3.6V -- -- 4 -- A tON Start-Up Time From EN -- -- -- 6 -- ms VIH En Input High Voltage VBAT=5V -- 1.3 -- -- VIL En Input Low Voltage VBAT=5V -- -- -- 0.6 PAM8945 Document number: DS38267 Rev. 2 - 2 4 of 9 www.diodes.com V June 2016 (c) Diodes Incorporated PAM8945 Performance Characteristics (@VBAT=3.6V, AGC=GND, TA = +25C, RL=8+33H, unless otherwise specified.) THD+N vs. Output Power (RL= 8) THD+N vs. Output Power (RL = 4) 20 10 5 20 10 f=100Hz/1kHz/10kHz (Red/Pink/Blue) PROVISIONAL PRODUCT 2 % 2 1 1 0.5 0.5 % 0.2 0.2 0.1 0.1 0.05 0.05 0.02 0.02 0.01 1m f=100Hz/1kHz/10kHz (Red/Pink/Blue) 5 2m 5m 10m 20m 50m 100m 200m 500m 1 2 0.01 1m 4 2m 5m 10m 20m 50m W 1 2 5 8 10 Po=0.3W/0.5W/1W (Red/Pink/Blue) 5 2 Po=0.3W/0.5W/1W (Red/Pink/Blue) 2 1 1 0.5 % 0.2 0.5 0.2 0.1 0.1 0.05 0.03 20 500m THD+N vs. Frequency (RL = 4) 10 % 200m W THD+N vs. Frequency (RL = 8) 5 100m 0.05 50 100 200 500 1k 2k 5k 10k 0.03 20 20k Hz 50 100 200 500 1k 2k 5k 10k 20k Hz PSRR vs. Frequency (RL = 8) +0 TT TT TT TTT -10 PSRR vs. Frequency (RL = 4) +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 PAM8945 Document number: DS38267 Rev. 2 - 2 -110 20 50 100 200 500 1k 2k 5k 10k 20k Hz 5 of 9 www.diodes.com June 2016 (c) Diodes Incorporated PAM8945 Performance Characteristics (@VBAT=3.6V, AGC=GND, TA = +25C, RL=8+33H, unless otherwise specified.) Noise Floor (RL =8) Gain vs. Supply Voltage +0 -10 -20 PROVISIONAL PRODUCT -30 -40 d B r -50 A -70 -60 -80 AGC=Float/GND/VBAT (Red /Blue/Green) -90 -100 -110 -120 20 50 100 200 500 1k 2k 5k 10k 20k Hz Efficiency vs. Output Power (RL 8) Quiescent Current vs. Supply Voltage Start Up PAM8945 Document number: DS38267 Rev. 2 - 2 Shutdown 6 of 9 www.diodes.com June 2016 (c) Diodes Incorporated PAM8945 Ordering Information (Note 4) PROVISIONAL PRODUCT PAM8945 X X X Pin Configuration P: 12 Pin Note: Package Packing J: W-QFN2030-12 R: Tape & Reel 7" Tape and Reel Part Number Package PAM8945PJR W-QFN2030-12 Quantity Part Number Suffix 3,000/Tape & Reel -7 4. For packaging details, go to our website at http://www.diodes.com/products/packages.html. Marking Information W-QFN2030-12 (Top View) P8945: Product Code X: Internal Code Y: Year 0~9 W: Week: A~Z: 1~26 weeks; a~z: 27~52 weeks; z represents 52 and 53 weeks. PAM8945 Document number: DS38267 Rev. 2 - 2 7 of 9 www.diodes.com June 2016 (c) Diodes Incorporated PAM8945 Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. PROVISIONAL PRODUCT W-QFN2030-12 D PIN 1# DOT BY MARKING b PIN #1 ID C0.125 W-QFN2030-12 E e La(x5) L(x7) A3 A Dim Min Max Typ A 0.700 0.800 0.750 A1 -0.050 -A3 0.203 REF b 0.200 0.300 0.250 D 1.950 2.050 2.000 E 2.950 3.050 3.000 e 0.500 BSC L 0.350 0.450 0.400 La 0.450 0.550 0.50 All Dimensions in mm A1 Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. W-QFN2030-12 X3 X2(5x) Y1(2x) Dimensions Value (in mm) C 0.500 X 0.350 X1 0.700 X2 0.600 X3 2.300 Y 0.600 Y1 0.700 Y2 0.350 Y3 3.300 Y2(8x) Y3 C Y(2x) X1(3x) X(4x) PAM8945 Document number: DS38267 Rev. 2 - 2 8 of 9 www.diodes.com June 2016 (c) Diodes Incorporated PAM8945 IMPORTANT NOTICE PROVISIONAL PRODUCT 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. 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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 (c) 2016, Diodes Incorporated www.diodes.com PAM8945 Document number: DS38267 Rev. 2 - 2 9 of 9 www.diodes.com June 2016 (c) Diodes Incorporated