Features
• PWM controller + CoolMOS™ within one compact package
• 650V (1) avalanche rugged CoolMOS™
• Typical RDSon= 3 Ohm
• Standard DIP-8 package up to 20W
• Only few external components required
• Low start up current
• Improved current mode control for low load conditions
• Input Undervoltage Lockout
• Max duty cycle 72%
• latched thermal shut down whenTj =140°C of PWM controller
• Overload and open loop protection by hiccup mode
• Overvoltage protection during hiccup mode
• Overall tolerance of current limiting < ±5%
• adjustable peak current limitation via external resistor
• current overshoot minimization
The TDA 16822 is a current mode pulse width modulator with built in CoolMOS™ transistor. It fulfils the requirement of minimum external control circuitry for a flyback application.
Current mode control means that the current through the CoolMOS™ transistor is compared with a reference
signal derived from the output voltage of the flyback application. The result of that comparision determines
the on-time of the CoolMOS™ transistor.
The accuracy of the switching frequency is highly sophisticated due to temperature compensation. Furthermore overload and open loop protection is implemented by sensing the feedback line. This means in case of overload or open loop the IC is working in protection mode.
(Picture: Pinout)
