IDT公司的P95020是新一代标准的专用控制器，集成了通用微控制器，包括耳机输出和2.5W D类音频放大器的高清音频CODEC，全部的功率管理功能，触摸屏控制器和实时时钟，特别适合手机，手持游戏设备，数字媒体播放器，手持导航系统等。本文介绍了P95020主要特性，方框图，IDTP95020评估板主要特性，电路图和材料清单。
The IDT P95020 is the first of a new generation of standardized application-specific controllers that incorporates a General Purpose Microcontroller, a high fidelity Audio CODEC including Headphone Outputs and a 2.5W Class D Audio Amplifier, full Power Management functionality, a Touch Screen Controller and a Real Time Clock all of which are required by portable consumer devices such as cellular phone handsets, portable gaming devices, digital media players, portable navigational devices, etc.
The IDTP95020 is designed to provide maximum flexibility to system designers by providing full customization and programmability. It is a highly integrated single chip device that incorporates an embedded general purpose microcontroller, a high fidelity audio CODEC, full power management functionality, backlight driver, battery charger, touch screen controller, and real time clock, all of which make it an ideal solution for portable consumer devices, such as cellular phone handsets, portable gaming devices, digital media players, and portable navigational devices.
The device compact footprint optimizes board area and reduces component count.
The IDTP95020 embedded Microcontroller features 4kB factory-programmable ROM, or the I²C master can load a custom program from an external EEPROM module. The system power-on/power-off sequencing and general system housekeeping can be programmed in internal ROM or external EEPROM. The I²C slave can be used during operation to communicate with the host to accept commands and report status.
The IDTP95020 operates from an adapter or USB power source to deliver power to the system load while charging the battery; up to 1.5A charging current. The input current is limited to the value set by the host for adapter source (up to 2A) or for USB source (100mA or 500mA). The switch-mode EnergyPathTM Battery Charger operates with a high efficiency buck regulator to transmit the power to the load with minimal loss.
The IDTP95020 power management features along with the switching regulators and LDOs can provide power for most extremely complex hand-held devices.
The device is offered in a small 132-ld 10x10x0.85mm QFN package and guaranteed to operate over the commercial temperature range 0°C to 70°C.

P95020主要特性：
􀂃 Quick Turn Customization
􀂃 Embedded Microcontroller
- Master controller during power-up and power-down
- Power up/down sequence field programmable with external EEPROM
- Dynamic power management via I²C bus interface
- Up to 10 general purpose I/Os
- Housekeeping for IDTP95020 and other devices
􀂃 Audio - 4 Channel CODEC with 24-bit resolution
- Integrated 2.5W mono Class D amplifier with filterless operation
- Stereo cap-less headphone driver
- Differential analog audio line inputs
- Dual mode microphone inputs (analog or DMIC)
􀂃 Battery Charger for Li-Ion / Li-Polymer up to 1.5A
- High efficiency switch-mode EnergyPath™ controller with advanced safety features
- USB or AC adaptor power input (5V)
- Programmable current limit
- Internal 180mΩ ideal diode with external ideal diode controller
􀂃 Buck DC-DC PWM converters with PFM mode
- 2x at 500mA, 0.75V to 3.7V output
- 1x at 1000mA, 0.75V to 3.7V output
􀂃 Boost DC-DC PWM converter
- 1x at 1.5A peak current, 4.05V to 5.0V output
􀂃 2-ch white LED driver with 2W total output power
- Two programmable current sinks, 25mA each
- Voltage limited to rating of external FET and diode
􀂃 Linear regulators
- 3x at 150mA, 0.75V to 3.7V output
- 4x at 50mA, 0.75V to 3.7V output
- 1x at 10mA, 3.3V or 3.0V output, always-on
􀂃 ADC and Touch Screen Controller
- 12 bit resolution, Sample rate 62.5kSPS, DNL -
1~+2LSB, INL +/-2LSB, on chip 2.5V reference
- On-chip temperature, charging current, SYS voltage and battery voltage measurement
- Touch pressure measurement
- 4-wire Touch Screen interface (shared with GPIO pins and ADC input channels)
􀂃 0℃ to 70℃ operating temperature range
􀂃 132-ld 10x10x0.85mm dual-row QFN package

P95020应用：
􀂃 Smart Phones
􀂃 Portable Gaming Device
􀂃 Digital Media Players
􀂃 Handheld Computers
􀂃 Portable Navigational Devices

图1。P95020方框图

图2。系统功能方框图

IDTP95020评估板
The IDTP95020 evaluation board serves to demonstrate the features and performance of the IDTP95020 Audio, Power Management and Control integrated circuit. The intuitive top-level layout and control switches simplify the user experience to emphasize the impressive level of integration and abundance of useful features that this device offers.
The device can be powered and controlled by a single mini-USB input. If more input power is required, a DC input from wall adapter can be connected.
The external EEPROM memory chip is pre-programmed with a basic start-up script that is automatically loaded when power is applied. The device can be reprogrammed to suit the needs of your specific application using the IDTP92020 software tool.
The core layout is a 6-layer reference that can be copied and integrated into a larger system design.

IDTP95020评估板主要特性：
􀂃 Reference design layout for easy system integration
􀂃 Low-cost 6-layer PCB with 1 oz. copper traces
􀂃 Fully assembled with test points and stand-offs
􀂃 User-friendly switches (jumper-free)
􀂃 Single input operation with mini-USB
􀂃 USB to I2C hardware converter for PC connectivity
􀂃 EEPROM to store and load start-up script
􀂃 Software tool for full register and settings control
􀂃 Optional DC power adapter input for high power applications
􀂃 LED status indicators for most inputs and outputs
􀂃 Thermal vias below package for improved heat dissipation

IDTP95020评估板包括：
􀂃 Evaluation board
􀂃 3.7V Li+ battery
􀂃 USB type A to mini-USB type B cable
􀂃 AC to DC power adapter
􀂃 2pcs 3.5mm male to male stereo cable
􀂃 4Ω portable speaker
􀂃 IDTP95020-EVAL evaluation board manual
􀂃 IDTP95020 product datasheet
􀂃 CD containing:
- IDTP95020 control software tool
- Reference layout Gerber Files
- Reference layout Cadence Allegro board files
- Electronic copy of IDTP95020 product datasheet
- Electronic copy of IDTP95020-EVAL manual

图3。IDTP95020评估板外形图

图4。IDTP95020 D类放大输出连接图

图5。IDTP95020评估板电路图（1）

图6。IDTP95020评估板电路图（2）

图7。IDTP95020评估板元件分布图
IDTP95020评估板材料清单：