1. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 Advanced Headphone Solution DIOO Microcircuits Ltd 1

2. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 Advanced Headphone System Design Concept DIOO Products USB 2.0 Data Switch: DIO3232A, DIO3202A, DIO3722 Low Ron Audio Switch: DIO1523 Depletion MOS Based Hi-Fi Audio Switch: DIO1500 (Compliant with FSA550) Power On/off Pop-Noise Elimination Audio Driver: DIO2115E 2.8W Class D Audio Amplifier DIO2140 1.5A Linear Charger IC DIO5158 5V/1A Buck DCDC P2P RP507K DIO6507 DCDC Boost DIO1500 Class D Audio Amplifier DIO2140 Pop Noise Elimination IC DIO2115E LRLR Bluetooth with Codec Audio Switch DIO1523 USB 2.0 data Switch DIO3232A/DIO3202A USB 2.0 Controller 1 USB 2.0 Controller 2 D1+ D1- D2+ D2- D+ D- SEL VCC=0 IN=OUT IN+ IN- OUT+ OUT- DIO5158 1A Linear charger

3. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 Recommended Parts 3

4. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 DIO1500 Depletion MOS Based Hi-Fi Audio Switch Features  Support 4-pole single-throw  Depletion Mode MOSFETs  V CC(OFF) : 1.6V to 3.0V  R ON : 0.8Ω Typical  R ON-Flat : 0.01Ω Typical  Package: 12-Ball WLCSP, (with Back side Laminate), 3x4 Array, 0.4mm Pitch, 250 µm Ball QFN3*3-16 Typical Applications Applications  Cell phones  Smart Phones  Tablets  MP3  GPS 4 Packages 12-Ball WLCSP QFN3*3-16 (Compliant with FSA550)

5. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 DIO5158 1A Li+ battery linear charger Features  One-chip Li+ battery charging solution  In-built power MOSFET, guarantee maximum power output  1A max charging current  Small quantity of external components required  Auto sleep mode  Charging status indicators: charging and finished  EP-SOIC-8 Pb-free packages Applicaionts 5 Charging Curves

6. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 DIO2115E Power On/off Pop-Noise Elimination Audio Driver: 6 Key Features  Voltage Output at 10kΩ Load 2 Vrms With 3.3V Supply Voltage  Ultra Low Distortion SNR>100dB  Typical Vn<10µVrms  THD+N<0.001% at 2 Vrms  No Pop/Clicks Noise when Power ON/OFF  Featuring external under voltage mute  Green available in DQFN-16 package Application Diagram DIO2115E is capable to drive 32 ohm headphone， No pop/click noise Applications  Set-Top Boxes  High Definition DVD Players  Car Entertainment System  Medical

7. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 RECOMMENDATION DIO6507 Features  Low RDS(ON) for internal switches (top/bottom) 230mΩ/170mΩ, 1.0A  2.5-5.5V input voltage range  40μA typical quiescent current  High light load efficiency  High switching frequency 1.5MHz minimizes the external components  Internal soft start limits the inrush current  100% dropout operation  Green package: DFN1.6*1.6-6 is pin compatible. Block Diagram High-Efficiency 1.5MHz, 1A Output Synchronous Step Down Converter Applications  Portable Navigation Device  Set Top Box  USB Dongle  Media Player  Smart phone 7 Compatible with RP507K

8. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 DIO3202A USB2.0 High-Speed and Audio Switch Features  Low Ron Audio/USB analog switch  Low USB Con: 5pF  Negative Signal Swing Capable  Low Audio Distortion  USB Switch -3dB Bandwidth: 720MHz  High Crosstalk and Off-isolation  Voltage Supply Operation: 2.7 to 5.25V  Three Green Packaged:  DIO3202A: DQFN10, QFN10, MSOP10  DIO3202B:DQFN10 Application Diagram Applications  Cell-Phone/PDA  MP3/MP4/PMP  Portable Instrumentation 8 Perfect solution for Multiplexing a Micro USB connector for headphone and USB device in smart phone design. Perfectly compatible with FSA221 ， TS5USBA224 和 FSA321

9. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 DIO3202A Eye Pattern USB2.0 Hi-Speed Eye PatternRon (Audio) Cross Talk 9

10. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 DIO3232A Low-Power, USB2.0 High-Speed Switch Features  Over-Voltage Tolerance (OVT)  VCC operation at 2.7V to 4.3V  Low Con: 6.5pF Typical  Low Ron: 6Ω Typical  Low Power Consumption: 1μA Maximum  -3dB Bandwidth: > 720MHz  Packaged in Green MSOP-10 and DQFN-10  8kV HBM ESD Rating  Power-Off/On Protection on Common port.  D+/D- Pins Tolerate up to 5.25V  Packages: MSOP-10, DQFN-10 Application Diagram Applications  Cell Phones  PDAs and MP3s  Portable Instrumentation  Battery Powered Communications  Computer Peripherals 10 Compatible with FSUSB30

11. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 Hi-Speed USB Switch Comparison DIOOS Company DIO3232ASXXXX Supply Voltage (Vcc)4.3V ESD (HBM) HBM: 8kV All Pin CDM: 2kV HBM:4kV (CDM not Specified ） (Corss-Talk)-45dB @240MHz-41dB @250MHz On Capitance6.5pf Over Voltage Protection (Common Pin)YesNot Specified Power Off ProtectionYes Package MSOP DQFN (1.4 x 1.8mm)WQFN (1.4 x 1.8mm) QFN (1.5*2.0mm) Price （ USD ） 11

12. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 DIO1523 Low Ron Audio Switch Audio Switch Features  Switch Type: SPDT(2X)  Voltage Operation: 1.8V to 4.2V  Ultra-Low On Resistance: 0.75Ω @ +4.2V  -3dB Bandwidth: 40MHz  High Off-isolation: -78dB@100kHz  Low Crosstalk: -103dB@100kHz  Excellent On Resistance Matching: 0.04Ω  Low Total Harmonic Distortion (THD)  Rail-to-Rail Input and Output Operation  Break-Before-Make Switching  Green Packaged: 10-DQFN  8kV HBM ESD Block Diagram Applications  Cell-Phone/PDA  MP3/MP4/PMP  Portable Instrumentation  Battery Powered Communications  Computer Peripherals 12 IN1, IN2NONC LOFFON H OFF Truth Table

13. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 DIO2140 2.8W Audio Power Amplifier Features  Maximum Output: 2.8W (VDD=5.0V, RL=4Ω, THD+N=10%)  Distortion Rate (THD): 0.05% (VDD=5.0V, PO=1W)  High Efficiency up to 90% at 400mW  Filter-Free Class D architecture  Needs only three External Components  Low Shutdown and Quiescent Current  2.8mA Quiescent Current  50nA Shutdown Current  Short Circuit Protection Function  Thermal Shutdown Function  Under Voltage Lockout Function  Low Shutdown and Quiescent Current  Green Package: FCQFN 1.5*1.5-9,  DFN 3.0*3.0-8 and MSOP-8 Application Diagram Applications  Wireless or Cellular Handsets and PDAs  Personal Navigation Devices  General Portable Audio Devices  Linear Vibrator Drivers 13

14. Dioo Headphone Solution ©Dioo Microcircuits Co., Ltd 2016 14