LTC2972

The DC2739A is a two-board demonstration system consisting of the DC2675A and DC2363A. The DC2675A contains all the circuitry needed to use two LTC^®2972 Power System Managers to control four power supplies. The DC2363A contains four power supplies (LTM^®4644-1quad 4A µModule^® regulator) which are configured to be controlled by the two LTC2972 devices. The DC2363A and DC2675A demo boards together provide a sophisticated 4-channel digitally programmable power supply system.

The LTC2972 is a 2-channel I²C/SMBus/PMBus Power System Manager that features accurate input current and energy measurement. The device monitors input current and input voltage, and calculates input power and energy. The DC2675A demonstrates the ability of the LTC2972 to sequence, trim, margin, supervise, monitor, and log faults for four power supplies. The LTC2972 monitors each channel’s output voltage and output current and also monitors its own internal die temperature.

The DC2363A is a single circuit board that contains four independent power supply rails. The board employs a single LTM4644 4-channel 4A DC/DC regulator. The board is pre-configured with 1.0V, 1.5V, 2.5V, and 3.3V supply rails and may be reconfigured with feedback resistors.

The LTpowerPlay^® graphical user interface (GUI) supports this demonstration system and enables complete control of all the features of the LTC2972. Together, the LTpowerPlay software and DC2739A hardware system create a powerful development environment for designing and testing configuration settings of the LTC2972. LTpowerPlay stores these settings in the LTC2972’s internal EEPROM or in a project file. The software displays all of the configuration settings and real time measurements from the Power System Management IC. Telemetry allows easy access and decoding of the fault log created by the LTC2972. The board comes preprogrammed with the EEPROM values appropriate for the four power supply rails on the DC2739A. Just plug and play!

Multiple DC2739A boards can be cascaded together to form a high channel count power supply (see Multi-Board Arrays). This cascaded configuration demonstrates features of the LTC Power System Management ICs which enable timing and fault information that is shared across multiple Power System Management ICs. The user can configure up to eight DC2739A boards, thereby controlling up to 32 separate power supply rails. Larger board arrays can be built using programmable I²C base addresses or bus segmentation.

Order preprogrammed devices from Linear Express using LTpowerPlay.
The following items are required:

• +12VDC Power Supply
• USB-to-I²C/SMBus/PMBus Controller (DC1613)
• LTpowerPlay Software

The DC2691A programming board contains the circuitry needed to program and verify the EEPROM of the LTC2972. It is shipped with a clamshell style programming socket installed. The LTpowerPlay^® *.proj file that corresponds to the factory default configuration can be found in the GUI.

To properly program and verify the contents of the EEPROM, download and install the LTpowerPlay software (GUI).

You also need a Linear Technology DC1613 USB to I²C/SMBus/PMBus Controller.

The DC2619A is a demonstration system for the LTC2972 power system manager that interfaces to various regulators. The board contains all the circuitry needed to demonstrate a power system that utilizes four 2-channel LTC2972 devices that manage eight power supplies. The eight power supplies include linear and switching regulators or the purpose of demonstrating a variety of methods to sense voltage and current. The demo board provides a sophisticated 8-channel programmable power supply system.

The LTC2972 is a 2-channel I²C/SMBus/PMBus power system manager that features accurate input current and energy measurement. The device monitors input current and input voltage, and calculates input power and energy. The DC2619A demonstrates the ability of the LTC2972 to sequence, trim, margin, supervise, monitor, and log faults for eight power supplies. The LTC2972 monitors each channel’s output voltage and output current and also monitors external temperature sensors and its own internal die temperature.

The DC2619A board contains eight independent power supply rails. The +5V/–5V rails are based on the switched capacitor LTC3260 regulator, the 1.0V/1.2V rails are powered by an LTC3633 switching regulator, the 1.5V/1.8V rails are powered by LTC3405A switching regulators, and the 2.5/3.3V rails are powered by LT3086/LT3055 linear regulators. The board is pre-configured with these voltages and may be re-configured with feedback resistors.

The LTpowerPlay® graphical user interface (GUI) supports this demonstration system and enables complete control of all the features of the LTC2972. Together, the LTpowerPlay software and DC2619A hardware system create a powerful development environment for designing and testing configuration settings of the LTC2972. LTpowerPlay stores these settings in the LTC2972’s internal EEPROM or in a project file. The software displays all of the configuration settings and real time measurements from the power system management IC. Telemetry allows easy access and decoding of the fault log created by the LTC2972. The board comes preprogrammed with the EEPROM values appropriate for the eight power supply rails on the DC2619A. Just plug and play!

Order pre-programmed devices from Linear Express® using LTpowerPlay.

The following items are required:

• +12VDC Power Supply
• USB-to-I2C/SMBus/PMBus Controller (DC1613)
• LTpowerPlay Software