Introduction
•Energy saving
•Ease of adapting software for different lamps
•Ease of
•Software can simplify the hardware
•Diagnostic functions — fault state, tube
•Open to innovation
The MC68HC908LB8 is designed for light ballast applications. It contains a HRP that is assigned to control a lamp ballast circuit using
The PFC circuit uses an
The reference design is intended for all geographic regions, so 110V/60Hz and 230V/50Hz input voltage supplies are supported.
The application can be debugged using the MON08 CYCLONE debug tool in monitor mode.
WARNING
Since the application runs at high voltage, it is dangerous to connect development tools directly to the board. Therefore, it is recommended to use an
1.3 The MC68HC908LB8 Microcontroller
The MC68HC908LB8 is a member of the
Standard features of microcontroller MC68HC908LB8 are:
•8 MHz internal bus frequency
•Trimmable internal oscillator:
–4.0 MHz internal bus operation
–
–25% untrimmed
–2% trimmed
•8K bytes of 10K write/erase cycle typical
•128 bytes of
1.Non volatile memory that retains its data when the power is removed.
Dimmable Light Ballast with Power Factor Correction, Rev. 1
8 | Freescale Semiconductor |