Application Note AN-1200 for the RIC7113 Vdd/Vcc Power Sequencing

Application Note for the RIC7113/IR2113 family of HVIC's have served many thousands of applications ranging from DC to DC converters to motor drives to ultrasonic and induction heaters. Application spaces include consumer/industrial applications as well as military applications that require Rad Hard IC's. The architecture of the IC is tried and true. The IC has two different power supply inputs. The input referred to as Vdd is the front end of the IC. This supplies the input circuitry. For a 5V TTL input, this supply would be tied to a 5V source. It can be tied to a supply as low as 3.3V to accept 3.3V TTL signals directly on the inputs