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.
|Frequency (Max) (kHz)|
|UVLO thresholds on/off (V)|
|Duty cycle (Max) (%)|
|Gate drive (Typ) (A)|
|Operating temperature range (C)|
|Package size: mm2:W x L (PKG)|
|-55 to 125|
CDIP | 16
CFP | 16
LCCC | 20
See datasheet (CDIP)
See datasheet (CFP)
20LCCC: 79 mm2: 8.89 x 8.89 (LCCC | 20)