UC3842B/43B/44B/45B CURRENT MODE PWM CONTROLLER
■ The UC3842B/43B/44B/45B are fixed frequency current mode PWM controller.
■They are specially designed for OFF Line and DC to DC converter applications with a minimal external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, currentsensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Protection circuitry includes built under voltage lockout and current limiting.
■The UC3842B, UC3844B have UVLO thresholds of 16 V (on) and 10 V (off).
■The corresponding thresholds for the UC3843B, UC3845B are 8.4V (on) and 7.6V (off).
■The UC3842B, UC3843B can operate within 100% duty cycle.
■The UC3844B, UC3845B can operate within 50% duty cycle.
■The UC3842B/43B/44B/45B is characterized for operation from TA = -40°C to 85°C.
●FEATURES
■ Low Start-Up and Operating Current
■ High Current Totem Pole Output
■ Under voltage Lockout With Hysteresis
■ Operating Frequency Up To 500KHz
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UC3842B 、 UC3843B 、 UC3844B 、 UC3845B 、 UC3842BN 、 UC3843BN 、 UC3844BN 、 UC3845BN 、 UC3842BM/TR 、 UC3843BM/TR 、 UC3844BM/TR 、 UC3845BM/TR |
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CURRENT MODE PWM CONTROLLER 、 fixed frequency current mode PWM controller |
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Datasheet |
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Please see the document for details |
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DIP-8;SOP-8 |
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English Chinese Chinese and English Japanese |
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2024-3-4 |
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1.2 MB |
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