DATASHEET
ISL78227 FN8808
Rev.4.00
Sep 18, 2017 2-Phase Boost Controller with Integrated Drivers
The ISL78227 is an automotive grade (AEC-Q100 Grade 1),
2-phase, 55V synchronous boost controller that simplifies the
design of high power boost applications. It integrates strong
half-bridge drivers, an analog/digital tracking input, and
comprehensive protection functions. Features The ISL78227 enables a simple, modular design for systems
requiring power and thermal scalability. It offers peak-current
mode control for fast line response and simple compensation.
Its synchronous 2-phase architecture enables it to support
higher current while reducing the size of input and output
capacitors. The integrated drivers feature programmable
adaptive dead time control offering flexibility in power stage
design. The ISL78227 offers a 90В° output clock and supports
1-, 2-, and 4-phases. Peak current mode control with adjustable slope
compensation Input/output voltage range: 5V to 55V, withstands 60V
transients Supports synchronous or standard boost topology Secondary average current control loop Integrated 5V 2A sourcing/3A sinking N-channel MOSFET
drivers Switching frequency: 50kHz to 1.1MHz per phase External synchronization Programmable minimum duty cycle The ISL78227 offers a highly robust solution for the most
demanding environments. Its unique soft-start control
prevents large negative current even in extreme cases, such as
a restart under high output pre-bias on high volume …
