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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ADP1043 데이터시트(PDF) 2 Page - Analog Devices |
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ADP1043 데이터시트(HTML) 2 Page - Analog Devices |
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2 / 8 page  ADP1043 Preliminary Technical Data Rev. PrA | Page 2 of 8 GENERAL DESCRIPTION The ADP1043 is a secondary side controller for switch mode power supplies (SMPS). It is designed for use in isolated redundant applications. The ADP1043 integrates the typical functions that are needed to control a power supply. These include • Output voltage sense and feedback • Digital loop filter compensation • PWM generation • Current sharing • OrFET control • Current, voltage, and temperature sense • Housekeeping and I2C interface • Calibration and trimming The main function of controlling the output voltage is performed using the feedback ADCs, the digital loop filter, and the PWM block. The feedback ADCs use a patented multipath approach. There is a combination of a high speed, low resolution (fast and coarse) ADC and a low speed, high resolution (slow and accurate) ADC. Loop compensation is implemented using the digital filter. This PID (proportional, integral, derivative) filter is implemented in the digital domain, allowing easy programming of filter characteristics, which is of great value in customizing and debugging designs. The PWM block generates up to six programmable PWM outputs for control of FET drivers and synchronous rectification FET drivers. This programmability allows many traditional and unique switching topologies to be realized. A current share bus interface is provided for parallel power supplies. The part also has hot-swap OrFET sense and control for N+1 redundant power supplies. Conventional power supply housekeeping features, such as remote and local voltage sense and primary and secondary side current sense, are included. An extensive set of protections is offered, including overvoltage protection (OVP), overcurrent protection (OCP), overtemperature protection (OTP), undervoltage protection (UVP), ground continuity monitoring, and ac sensing. All these features are programmable through the I2C bus interface. This bus interface is also used to calibrate the power supply. Other information, such as input current, output current, and fault flags, is also available through the digital bus interface. The internal 1024-byte EEPROM makes it possible to store all programmed values and allows standalone control without a microcontroller. Approximately 700 bytes of the EEPROM are available for user information, such as version and manufactu- ring date. The ADP1043 comes with a free downloadable GUI, which provides all the necessary software to program the part. The ADP1043 operates from a single 3.3 V supply and is specified from −40°C to +85°C. RES SHAREo VS3– VS3+ PGOOD1 VDD OUTA OUTB SR1 SR2 OUTC OUTD CS1 PSON SCL SDA VCORE AGND OUTAUX PGOOD2 SHAREi FLAGIN ADP1043 RTD ADD DGND ADC ADC ADC ADC ADC ADC UVLO PWM ENGINE VREF LDO OSC ADC ADC IREF 8kB EEPROM DIGITAL CORE I2C INTERFACE PWM Figure 2. Functional Block Diagram |
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