Integrated High-Power DCDC controller
ICsense designed an ASIC that is used in Power-over-Ethernet Powered Devices (PoE-PD), which require high power (40W). The ASIC has a DC-DC converter controller to support a 9V auxiliary supply. One of the key blocks is a PWM controller for DC-DC conversion. The PWM controller is designed for DC-DC conversion under current-mode control and therefore includes a slope compensation technique. The chip supports flyback, buck and forward DC-DC converter topologies. The ASIC is marketed by OnSemi (NCP1083).
Features:
- 40W PoE powered device (RJ45 connector)
- PWM controller for flyback, buck and forward converters
- Programmable operational current limit of up to 1100mA for extended power ranges
- Adjustable UVL (under voltage lockout)
- Programmable inrush current limit
- Over temperature protection
- Wide duty cycle range with internal slope compensation circuitry
- Programmable oscillator frequency
- Temperature range of 40°C to 85°C with full operation up to 150°C junction temp