Analog Devices LTC3889 | Demoboard DC2595A

Description

Demonstration circuit 2595A is a high voltage, dual out¬put step-down synchronous buck converter featuring the LTC®3889EUKG, a 60V dual-phase current mode control¬ler. The LTC3889 has the PMBus interface and the power system management functions. The DC2595A uses discrete MOSFET as the power stage. The input range of this board is from 36V to 54V, and the default outputs are 12V/20A (VOUT0) and 24V/20A (VOUT1). DC2595A also has an on-board dynamic load circuit, which makes it easy for the customer to evaluate the transient performances. Please be aware that the DC2595A default connects VOUT0 (12V) to the LTC3889 EXTVCC pin through R168. As a result, the DRVCC can be adjusted to 6.3V, 7.4V or 9V by setting DRVSET to 0, 1 or 2 in LTpowerPlay®. If you want to adjust VOUT0 to a voltage higher than 12V, R168 must be removed first to avoid damaging the IC.Please be aware that the DC2595A default connects VOUT0 (12V) to the LTC3889 EXTVCC pin through R168. As a result, the DRVCC can be adjusted to 6.3V, 7.4V or 9V by setting DRVSET to 0, 1 or 2 in LTpowerPlay®. If you want to adjust VOUT0 to a voltage higher than 12V, R168 must be removed first to avoid damaging the IC.The DC2595A powers up to default settings and produces power based on configuration resistors or NVM without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter aspects of the LTC3889. To fully explore the extensive power system management features of the parts, download the GUI software LTpowerPlay onto your PC and use LTC’s I2C/ SMBus/PMBus Dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on-the-fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.

Features

• PMBus/I2C Compliant Serial Interface
  • Telemetry Read-Back IncludesVIN, IIN, VOUT, IOUT, Temperature and Faults
  • Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV/OC, Frequency, and Control Loop Compensation
• Output Error Less Than ±0.5% Over Temperature
• Integrated 16-Bit ADC and 12-Bit DAC
• Integrated High Side Current Sense Amplifier
• Internal EEPROM with ECC and Fault Logging
• Integrated N-Channel MOSFET Gate Drivers
• Power Conversion
• WideVIN Range: 5Vto 60V
• VOUT0, VOUT1 Range: 1V to 40V
• Analog Current Mode Control
• Accurate PolyPhase® Current Sharing for Up to 6 Phases (85kHzt o 500kHz)
• Available in a 52-Lead (7mm× 8mm) QFN Package

More information

• Datasheet
• IC product information