Unitrode UC1825 UC2825 UC3825 DATA SHEET
Update: 28 September, 2023
The UC1825 family of PWM control ICs is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward. Protection circuitry includes a current limit comparator with a 1V threshold, a TTL compatible shutdown port, and a soft start pin which will double as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance. These devices feature totem pole outputs designed to source and sink high peak currents from capacitive loads, such as the gate of a power MOSFET.
Brand: UNITRODE
File format: PDF
Size: 1018 KB
MD5 Checksum: 59DB1F596707D74D54706F22804860EC
Publication date: 09 May, 2012
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PDF Link: Unitrode UC1825 UC2825 UC3825 DATA SHEET PDF