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ADP1043AACPZ-RL датащи(PDF) 4 Page - Analog Devices |
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ADP1043AACPZ-RL датащи(HTML) 4 Page - Analog Devices |
4 / 72 page ADP1043A Rev. 0 | Page 4 of 72 The ADP1043A is a secondary side controller for switch mode power supplies (SMPS). It is designed for use in isolated redun- dant applications. The ADP1043A 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 • Current, voltage, and temperature sense • OrFET control • 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 multipath approach (patent pending). The ADP1043A combines 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 to allow easy programming of filter characteristics, which is of great value in customizing and debugging designs. The PWM block generates up to seven 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 provides 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 protec- tion (UVP), ground continuity monitoring, and ac sense. All these features are programmable through the I2C bus inter- face. 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 I2C 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 ADP1043A. For more information about the GUI, contact Analog Devices, Inc., for the latest software and a user guide. The ADP1043A operates from a single 3.3 V supply and is specified from −40°C to +85°C. FUNCTIONAL BLOCK DIAGRAM RES SHAREo VS3– VS3+ PGOOD1 VDD OUTA OUTB SR1 SR2 OUTC OUTD CS1 PSON SCL SDA VCORE AGND OUTAUX PGOOD2 SHAREi FLAGIN DGND RTD ADD ADC ADC ADC ADC UVLO PWM ENGINE VREF LDO ADC ADC 8kB EEPROM DIGITAL CORE I2C INTERFACE PWM OSC Figure 2. |
Аналогичный номер детали - ADP1043AACPZ-RL |
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Аналогичное описание - ADP1043AACPZ-RL |
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