TDA4918

The TDA4918 supplies ICs for the direct control of SIPMOS power transistors comprise digital and analog functions. The features of TDA4918 are: (1)switching frequency up to 300kHz or 150kHz; (2)push-pull output driver with +700mA -500mA; (3)separate GND for the driver outputs; (4)feed-forward control; (5)soft start; (6)hysteresis adjustable at overvoltage and under voltage comparator; (7)current-saving starting circuit; (8)current mode and voltage mode operation are possible.

The following is about the absolute maximum ratings of TDA4918: (1)supply voltage: -0.3V min and 33V max; (2)voltage at RT; CT: -0.3V min and 6V max; (3)current at CT: 3mA; (4)CR input: -0.3V min and 6V max; (5)RR input: 0mA min and 3mA max; (6)reference voltage: -0.3V min and 6V max; (7)output Op Amp: -0.3V min and 6V max.

The electrical characteristics of the TDA4918 are: (1)current consumption with load at VREF: 6mA min and 18mA; (2)standby operation: 3.5mA max; (3)turn-on threshold for Vs rising: 9.6V max; (4)turn-on threshold for Vs falling: 7.8V min; (5)voltage: 2.475V min, 2.5V typical and 2.525V max; (6)load current: 0mA min and 3mA max; (7)voltage change: 10mV max; (8)temperature respomse: 0.3mV/K max.