The UC1846 control IC provides all of the necessary features to implement
fixed-frequency, current-mode control schemes, while maintaining a minimum external parts count.
The superior performance of this technique can be measured in improved line regulation, enhanced
load-response characteristics, and a simpler, easier-to-design control loop. Topological advantages
include inherent pulse-by-pulse current-limiting capability, automatic symmetry correction for
push-pull converters, and the ability to parallel power modules, while maintaining equal current
sharing.
Protection circuitry includes built-in undervoltage lockout and programmable current
limit, in addition to soft-start capability. A shutdown function is also available, which can
initiate either a complete shutdown with automatic restart or latch the supply off.
Other features include fully latched operation, double pulse suppression and deadline
adjust capability.
The UC1846 features low outputs in the OFF state.
The UC1846 control IC provides all of the necessary features to implement
fixed-frequency, current-mode control schemes, while maintaining a minimum external parts count.
The superior performance of this technique can be measured in improved line regulation, enhanced
load-response characteristics, and a simpler, easier-to-design control loop. Topological advantages
include inherent pulse-by-pulse current-limiting capability, automatic symmetry correction for
push-pull converters, and the ability to parallel power modules, while maintaining equal current
sharing.
Protection circuitry includes built-in undervoltage lockout and programmable current
limit, in addition to soft-start capability. A shutdown function is also available, which can
initiate either a complete shutdown with automatic restart or latch the supply off.
Other features include fully latched operation, double pulse suppression and deadline
adjust capability.
The UC1846 features low outputs in the OFF state.