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Overview
| Topology | Buck Converter |
| Input voltage | 36-72 V |
| Output 1 | 12 V / 20 A |
Description
Demonstration circuit 2995A is a buck regulator featuring the LTC7891. The DC2995A operates from a 36V to 72V input voltage range and generates a 12V, 20A output. The LTC7891 has a precision voltage reference which can generate an output voltage with 2% tolerance over the full operating conditions. The 500kHz switching frequency operation results in a small and efficient circuit. The converter achieves over 96% efficiency with 20A load.The demonstration circuit can be easily modified to regulate output voltages from 0.8V to 60V.The DC2995A provides a high performance cost-effective solution for generating a 12V output. The LTC7891 data sheet gives a complete description of this part, its operation and application information and must be read in conjunction with this demo manual.
Features
- GaN drive technology fully optimized for GaN FETs
- Wide VIN range: 4 V to 100 V
- Wide output voltage range: 0.8 V ≤ VOUT ≤ 60 V
- No catch, clamp, or bootstrap diodes needed
- Internal smart bootstrap switches prevent overcharging of high-side driver supplies
- Internally optimized, smart near zero dead times or resistor adjustable dead times
- Split output gate drivers for adjustable turn on and turn off driver strengths
- Accurate adjustable driver voltage and UVLO
- Low operating IQ: 5 μA (48 VIN to 5 VOUT)
- Programmable frequency (100 kHz to 3 MHz)
- Phase lockable frequency (100 kHz to 3 MHz)
- Spread spectrum frequency modulation
- 28-lead (4 mm × 5 mm) side wettable QFN package
Typical applications
- Telecommunications power systems
- Military avionics and medical systems
- Industrial power systems
- medical systems
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Wire Type | Pins | Type | Mount | L(mm) | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCF SMT High Current Inductor, 3.1 µH, 33.15 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCF SMT High Current Inductor | Inductance3.1 µH | Performance Rated Current33.15 A | Saturation Current @ 10%41 A | Saturation Current @ 30%45 A | DC Resistance2.3 mΩ | Self Resonant Frequency29 MHz | Wire TypeFlat | Pins2 | – | MountSMT | Length20.8 mm | Height13.5 mm | Rated Current26 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WR-PHD Jumper, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | – | Pins2 | – | – | – | – | Rated Current3 A | Working Voltage200 V (AC) | Operating Temperature -25 °C up to +105 °C | |||
 | WR-PHD Pin Header, –, – | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | Pins6 | TypeStraight | MountTHT | Length6 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C |