ROHM Semiconductor introduces BD8676KN power supply chip for CCD cameras .
BD8676KN includes two power supplies built in for system ICs in addition to the positive/negative supplies required for CCD and can drive up to 4 channels .
Thanks to built-in switching and LDO regulators BD8676KN power supply for CCD cameras have a high efficiency greater than 80% during full-drive (all-channel) operation .
In addition ,a FET phase compensation and feedback resistor are integrated at each channel, reducing the number of parts required .
The integrated startup sequence control circuit of the BD8676KN for both positive and negative power supplies prevents damage to the CCD sensor while maximizing performance.
The input voltage of the BD8676KN power supply must be from 4.5 to 9 volts (18 volts maximum supported ) and the maximum output current for BD8676KN is 150mA for 1.2V and 3.3V output , 15mA for 15V and -5mA for -5.5V .
The switching frequency can be adjusted from 500kHz to 1.2MHz using an external resistor .
Other features offered by BD8676KN are : phase compensation and feedback resistor built into each channel , integrated high accuracy reset circuit (±1%) , abnormal output voltage detection , Off latch function , thermal shutdown , startup fault detection .