
Emballages disponibles
Qté d'emballage(s) :
2 500
Style d'emballage :
SOIC-8
Méthode de montage :
Surface Mount
Quantité | Prix Internet |
---|---|
1 | $0.635 |
250 | $0.325 |
500 | $0.305 |
750 | $0.295 |
1 500+ | $0.275 |
Attributs
Supply Current-Max | 17mA |
Supply Voltage | 7.6V to 30V |
Turn On Threshold Voltage | 16V |
Turn Off Threshold Voltage | 10V |
Duty Cycle-Max | 96% |
Frequency-Max | 275kHz |
Operating Temp Range | -40°C to +105°C |
Fonctionnalités et applications
The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and DC−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 and surface mount (SOIC−8) 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 UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off−line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off). Key Features: To learn more about the UC3843B product family, Click Here