IDT公司的P95020是新一代標準的專用控制器，集成了通用微控制器，包括耳機輸出和2.5W D類音頻放大器的高清音頻CODEC，全部的功率管理功能，觸摸屏控制器和實時時鐘，特別適合手機，手持游戲設備，數字媒體播放器，手持導航系統等。本文介紹了P95020主要特性，方框圖，IDTP95020評估板主要特性，電路圖和材料清單。
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應用：
Smart Phones
Portable Gaming Device
Digital Media Players
Handheld Computers
Portable Navigational Devices
圖1。P95020方框圖
圖2。系統功能方框圖
IDTP95020評估板
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評估板主要特性：
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評估板包括：
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
圖3。IDTP95020評估板外形圖
圖4。IDTP95020 D類放大輸出連接圖
圖5。IDTP95020評估板電路圖（1）
圖6。IDTP95020評估板電路圖（2）
圖7。IDTP95020評估板元件分布圖
IDTP95020評估板材料清單：
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