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ADP1053 Folha de dados(PDF) 4 Page - Analog Devices |
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ADP1053 Folha de dados(HTML) 4 Page - Analog Devices |
4 / 84 page ADP1053 Data Sheet Rev. A | Page 4 of 84 The ADP1053 provides local and remote differential sensing of the output voltage, which is converted to the digital domain using high speed, high resolution Σ-Δ converters. The proprie- tary conversion system maximizes the bandwidth of the converter and minimizes output noise due to digital quantization error, thus dramatically reducing the power consumption of the digital controller. Configurable compensation networks provide three poles and two zeros to control feedback loop stability and optimize output response. In addition, a programmable feedforward feature can be enabled to enhance input voltage response. The ADP1053 provides extensive protection and monitoring capabilities. For example, each regulated output has its own independent voltage threshold, and overvoltage protection is provided for each regulated output. The protection and moni- toring features combine to eliminate the possibility of a single point of failure. Fast overcurrent protection is provided to protect the system from short circuits. Accurate current sensing and overcurrent limit protections are also included. In addition, two overtemp- erature protection circuits are provided for use with 100 kΩ thermistors to sense the hot spots. Other protection and monitoring features include a program- mable power-on (PSON) function and power-good monitoring for Channel A and Channel B. All these features are programmable through the PMBus/I2C interface. This interface is also used for calibration. Additional information, such as input current, output current, and fault flag status, can be read via the PMBus/I2C interface. The built-in EEPROM is used to store programmed values and instructions. System reliability is improved through a built-in checksum and redundancy of critical circuits. In the event of a system fault, the EEPROM can be configured to capture the first instance of failure; this stored fault data can be analyzed to improve overall system reliability and reduce failure mode analysis time. The ADP1053 is designed to maximize ease of use and reduce time to market with the provision of a comprehensive, easy to use graphical user interface (GUI) that allows programming of most parameters and protection and monitoring limits. The ADP1053 is available in a 40-lead LFCSP package and operates from a single 3.3 V supply. FUNCTIONAL BLOCK DIAGRAM ADP1053 ADC ADC ADC ADC ADC ADC DAC DAC PWM ENGINE DIGITAL CORE 1.2V 1.2V 1.2V ADC ADC CS1_A CS1_B CS OUT1 8kBYTE EEPROM I2C INTERFACE CS2+_A CS2–_A CS2–_B CS2+_B VS+_A VS–_A VS–_B VS+_B OVP_A PGND_A PGND_B OVP_B OUT3 OUT4 OUT2 OUT5 OUT6 OUT7 OUT8 PGOOD_A FLGI/SYNI FLGO/SYNO PSON_A PSON_B PGOOD_B RTD2 RTD1 ADD ADC ACSNS ADC UVLO LDO OSC VREF RES VDD DGND VCORE AGND SDA SCL Figure 2. |
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