SI8251

Si8250/1/2 D I G I TA L P O W E R C O N T R O L L E R Features Single-Chip, Flash-based digital power controller Supports isolated and non-isolated applications Enables new system capabilities such as: - Adaptive dead-time control for higher efficiency - Nonlinear control for faster transient response - Self diagnostics for higher reliability - Full PMBus command set implementation for system connectivity Highly integrated control solution: High-speed digital hardware control loop In-system programmable supervisory processor Programmable system protection functions Hardware cycle-by-cycle current limiting and OCP External clock and frame synchronization inputs Performs system management functions such as external power supply sequencing and fan control/monitoring In-system Flash programmable Flash can also be used as NV memory for data storage Low cost, comprehensive development tool kit includes: Graphical, easy-to-use system design tools Integrated development environment In-system, on-line debugger Turnkey isolated 35 W digital half-bridge target board Typical Applications Isolated and non-isolated DC/DC converters AC/DC converters Fully Pb-free and ROHS compliant packages 32-pin LQFP 28-pin 5 x 5 mm QFN Temp Range: –40 to +125 ºC Pin Assignments: See page 23 32-pin LQFP GND VDD PH1 PH2 PH3 PH4 PH5 32 31 30 29 28 27 26 RST/C2CK IPK VSENSE GNDA VDDA VREF P1.0/VIN/AIN0 P1.1/AIN1 1 2 3 4 5 6 7 8 25 PH6 24 23 22 P0.0 P0.1 P0.2 P0.3 / XCLK P0.4 P0.5 P0.6 P0.7 Si8...