Transcription of UC3842B - High Performance Current Mode Controllers
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UC3842B - High Performance Current Mode Controllers
Semiconductor Components Industries, LLC, 2013 September, 2013 Rev. 171 Publication Order Number: UC3842B /DUC3842B, UC3843B,UC2842B, UC2843 BHigh PerformanceCurrent Mode ControllersThe UC3842B , UC3843B series are high Performance fixedfrequency Current mode Controllers . They are specifically designed forOff Line and DC DC converter applications offering the designer acost effective solution with minimal external components. Theseintegrated circuits feature a trimmed oscillator for precise duty cyclecontrol, a temperature compensated reference, high gain erroramplifier, Current sensing comparator, and a high Current totem poleoutput ideally suited for driving a power included are protective features consisting of input andreference undervoltage lockouts each with hysteresis, cycle by cyclecurrent limiting, programmable output deadtime, and a latch for singlepulse devices are available in an 8 pin dual in line and surfacemount (SOIC 8) plastic package as well as the 14 pin plastic surfacemount (SOIC 14).
Power Supply Rejection Ratio (VCC = 12 V to 25 V) PSRR 60 70 − 60 70 − dB Output Current Sink (VO = 1.1 V, VFB = 2.7 V) Source (VO = 5.0 V, VFB = 2.3 V) ISink ISource 2.0 −0.5 12 −1.0 − − 2.0 −0.5 12 −1.0 − mA Output Voltage Swing High State (RL = 15 k to ground, VFB = 2.3 V) Low State (RL = 15 k to Vref, VFB = 2.7 V) UC284XB ...
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