The UC1846-SP control devices provide 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 UVLO 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, deadline adjust capability, a ±1% trimmed bandgap reference, and low outputs in the OFF state.
|Vin (Min) (V)|
|Vin (Max) (V)|
|Duty Cycle (Max) (%)|
|Frequency (Max) (kHz)|
|UVLO Thresholds On/Off (V)|
|Operating Temperature Range (C)|
|Package Size: mm2:W x L (PKG)|
|-55 to 125|
See datasheet (CDIP)
See datasheet (CFP)
20LCCC: 79 mm2: 8.89 x 8.89(LCCC)