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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ADP1052ACPZ-R7 데이터시트(PDF) 14 Page - Analog Devices |
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ADP1052ACPZ-R7 데이터시트(HTML) 14 Page - Analog Devices |
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14 / 113 page  ADP1052 Data Sheet Rev. B | Page 14 of 113 THEORY OF OPERATION The ADP1052 is designed as a flexible, easy to use, digital power supply controller. The ADP1052 integrates the typical functions that control power supply, such as • Output voltage sense and feedback • Voltage feedforward control • Digital loop filter compensation • PWM generation • Current, voltage, and temperature sense • Housekeeping and I2C/PMBus interface • Calibration and trimming The main function of controlling the output voltage is through the feedback ADCs, the digital loop compensator, and the digital PWM engine. The feedback ADCs feature a patented multipath architecture, with a high speed, low resolution (fast and coarse) ADC and a low speed, high resolution (slow and accurate) ADC. The ADC outputs are combined to form a high speed and high resolution feedback path. Loop compensation is implemented using the digital compensator. This proportional, integral, derivative (PID) compensator is implemented in the digital domain to allow easy programming of filter characteristics, which is of great value in customizing and debugging designs. The PWM engine generates up to six programmable PWM outputs for control of primary side FET drivers and synchronous rectification FET drivers. This programmability allows many generic and specific switching power supply topologies to be realized. Conventional power supply housekeeping features, such as input voltage sense, output voltage sense, primary side current sense, and secondary side current sense, are included. The device offers an extensive set of protections, including overvoltage protection (OVP), overcurrent protection (OCP), overtemperature protection (OTP), undervoltage protection (UVP), and synchronous rectifier (SR) reverse current protection (RCP). All of these features are programmable through the I2C/PMBus digital bus interface. This interface is also used for calibrations. Other information, such as input current, output current, and fault flags, is also available through this digital bus interface. The internal EEPROM can store all programmed values and allows standalone control without a microcontroller. A free, downloadable GUI is available that provides all the necessary software to program the ADP1052. To obtain the latest GUI software and a user guide, visit http://www.analog.com/digitalpower. The ADP1052 operates from a single 3.3 V power supply and is specified from −40°C to +125°C. RTD SDA SCL SYNI/FLGI SR2 SR1 OUTD OUTC ADD VCORE AGND RES PWM ENGINE ADC OSC DIGITAL CORE VREF PMBUS 8kB EEPROM VS– VS+ OVP CS1 OUTA ADC OUTB VF CS2– CS2+ CTRL VDD UVLO LDO DAC ADC ADC ADC PG/ALT Figure 11. Functional Block Diagram |
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