Analog Devices LTC7878 | Demoboard EVAL-LTC7878-BZ

Beschreibung

The evaluation circuit EVAL-LTC7878-BZ features the LTC®7878: a 70V parallelable buck-boost controller with inductor DCR current sensing. The LTC7878 is a four-switch buck-boost switching regulator designed to operate above, below, or equal to the output voltage safely and easily. The constant-frequency, peak-current mode architecture allows phase-lockable switching frequency up to 600kHz. A programmable input or output current loop regulates the average input or output current loop, making it suitable for battery charging applications. Additionally, with a wide 5V to 70V input and output range and seamless, low-noise transition between operating regions, the LTC7878 is ideal for industrial and telecom systems.The EVAL-LTC7878-BZ operates from a 36V to 65V input voltage range and generates an output of 48V and at least a 5.5kW output power. The board features five LTC7878’s in parallel to achieve very high power. The parallel operation is set to a switching frequency of 150kHz, which results in an efficient circuit. The adjacent outputs are phase shifted by 72° offset to interleave the switching while still providing great current sharing.The LTC7878 has a precision voltage reference that can generate an output voltage with a 1% tolerance over the full operating conditions. The converter achieves over 98% efficiency with a 5.5kW output power at full operating VIN.

Eigenschaften

Single Inductor Architecture Allows VIN Above, Below or Equal to the Regulated VOUTSynchronous Rectification: Up to 98% EfficiencyWide VIN Voltage Range: 5V to 70V±1% Output Voltage Accuracy: 1V ≤ VOUT ≤ 70VDCR or RSENSE Current SensingPeak Current Mode Control in Buck/Boost/Buck-Boost ModeProgrammable Input or Output Current Regulation7V NMOS Gate DriversPhase-Lockable Frequency (100kHz to 600kHz)Multiphase/Multi-ICs Parallel OperationSelectable Continuous or Pulse-Skipping Mode Operation and Inductor Peak Current LimitsSmall 32-Lead 5mm × 5mm QFN Package48-Lead 7mm x 7mm x 0.75mm LFCSP Package

Typische Anwendungen

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers