Synchronous boost controller reaches 97 percent efficiency, eliminates heat sink
The LTC3787 can produce a 24V at 10A output from a 12V input. According to Linear, it reaches an efficiency of up to 97 percent under these operation conditions. The LTC3787's 135uA standby quiescent current when configured for Burst Mode operation makes it ideal for high power automotive audio amplifiers, as well as industrial and medical applications where a step-up DC/DC converter must deliver high power in a small solution size.
The LTC3787 operates from an input voltage ranging from 4.5V to 38V during start-up, maintains operation down to 2.5V after start-up and can regulate an output voltage as high as 60V. The 1.2Ohm onboard N-channel MOSFET gate drivers are capable of slewing large MOSFET gates quickly. The device's current mode architecture, clock output and phase modulation enables easy paralleling of multiple devices for up to 12 phase operation. The LTC3787 has a phase-lockable frequency from 75kHz to 850kHz or a selectable fixed frequency from 50kHz to 900kHz. In applications where the input voltage exceeds the regulated output voltage, the LTC3787 keeps the synchronous MOSFET on continuously so that the output voltage follows the input voltage with minimal power loss. In addition, this device features adjustable cycle-by-cycle current limit and can use a sense resistor or monitor the voltage drop across the inductor (DCR) for current sensing. Furthermore, the LTC3787 has adjustable soft-start, a power good output and maintains +1% reference voltage accuracy over an operating junction temperature range of -40°C to 125°C.
The LTC3787 is available in SSOP-28 and 4mm x 5mm QFN-28 packages. The 1,000-piece price starts at $4.12 each.
For more information, visit www.linear.com/3787.
- 4 Mbps CAN transceiver with ±60V fault protection
- Spread Spectrum Frequency Modulation Reduces Automotive LED Driver EMI
- Configurable buck DC/DCs deliver 8 A from 2 to 4 independent outputs
- 150°C, 45V LDO has 3 µA quiescent current for automotive, industrial designs
- Synchronous buck-boost controller regulates up to 250W
- Toyota adopts LEDs for adaptive high beam technology
- Microchip adds enhanced noise immunity, ECC flash to MCUs
- USB 4-port controller hub connects smartphone to infotainment system
- Supercapacitor innovation promises panel-powered cars
- All-in-one controller family to offer flexibility in driving small motors
- Automotive MCU system power supplies for idling-stop systems
- Synchronous step-down DC/DC offers 93% efficiency at automotive voltages
- 40V, 400mA output, step-down regulator has dual tracking LDOs
- Breakthrough for traction batteries? Ultra-fast battery charges in 2 minutes
- Research platform refines EV battery production processes
- Is this the Tesla killer?
- Self-driving cars in real-world traffic with real customers
- Flow cell powertrain stuns with extreme data
- Audi launches lighting lab
- Supercapbatteries, thermoelectrics to power future cars
- Fuel cells in trucks: silent power instead of idling motors
- Connected Car: Dramatic growth ahead
- Rear axle becomes steerable… by wire
- Ballard IP to boost Audi’s fuel cell developments
- Infineon, Hella make radar sensor more affordable
- Volvo cars share road-condition info in the cloud
- Scalable electric powertrain targets utility vehicles
- OLED exterior lighting soon in series vehicles, Osram says
- Driver chip reduces LED taillight complexity
- Industrial production of li-ion cells in Germany comes closer
- Making cars safer through technology innovation
- Supplying DC input power for HEV testing
- NSR Noise Suppressors: Wirewound Resistors
- Virtual Hardware “In-the-Loop”: Earlier Testing for Automotive Applications
- Open Standards and Product Differentiation
- Camera Solutions with Micrel Power Management and Networking