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Leobot Electronics South Africa - Electronic Component Supplier & Development Service Provider
Leobot Electronics Online Shop
R2.38
The UC3842A, UC3843A series of high performance fixed frequency current mode controllers are specifically designed for off−line and DC−to−DC converter applications offering the designer a cost effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle−by−cycle current limiting, programmable output deadtime, and a latch for single pulse metering. These devices are available in an 8−pin dual−in−line plastic package as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14 package has separate power and ground pins for the totem pole output stage. The UCX842A has UYLO thresholds of 16 V (on) and 10 V (off), ideally suited for off−line converters. The UCX843A is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
Datasheet available here:https://leobot.net/datasheets/UC3843AN.pdf
Manufacturer: Texas Instruments Product Category: Switching Controllers Topology: Boost, Buck, Flyback, Forward Number of Outputs: 1 Output Switching Frequency: 500 kHz Duty Cycle - Max: 100 % Input Voltage: 12 V to 28 V Output Voltage: 5 V Output Current: 200 mA Minimum Operating Temperature: 0 C Maximum Operating Temperature: + 70 C Mounting Style: Through Hole Package/Case: PDIP-8 Brand: Texas Instruments Fall Time: 50 ns Operating Supply Current: 25 mA Operating Supply Voltage: 12 V to 28 V Product Type: Switching Controllers Rise Time: 50 ns Series: UC3843A
Length: 10.00mmWidth: 5.00mmHeight: 5.00mm
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