IR IRDC3477 SupIRBuck 15A DC电源解决方案
The IR3477 SupIRBuckTM is an easy-to-use, fully integrated and highly efficient DC/DC voltage regulator. The onboard constant on time hysteretic controller and MOSFETs make IR3477 a space-efficient solution that delivers up to 15A of precisely controlled output voltage. IR3477 is housed in a 20-lead 5mmx6mm QFN package.
Key features offered by IR3477 include: programmable switching frequency, soft start, temperature compensated over current protection, and thermal shutdown allowing a very flexible solution suitable for many different applications and an ideal choice for battery powered applications.
Additional features include pre-bias startup, a very precise 0.5V reference, forced continuous conduction mode option, over/under voltage protection, power good output, and enable input with voltage monitoring capability.
This user guide contains the schematic, bill of materials, and operating instructions of the IRDC3477 evaluation board. Detailed product specifications, application information and performance curves at different operating conditions are available in the IR3477 data sheet.
VIN = +12V
VCC = +5V
VOUT = +1.05V
IOUT = 0 to 15A
FS = 300kHz @ CCM
L = 1μH
CIN = 22μF (ceramic 1210) + 68μF (electrolytic)
COUT = 47μF (ceramic 0805) + 330μF (PC-CON)