(China (Mainland))
Product Summary
The UC2843BD is a high performance fixed frequency current mode controller. The UC2843BD is specifically designed for Off-Line and DC-DC converter applications offering the designer a cost-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 MOSFET. The UC2843BD has UVLO thresholds of 16 V (on) and 10 V (off),ideally suited for off-line converters.
Parametrics
UC2843BD absolute maximum ratings: (1)Bias and Driver Voltages (Zero Series Impedance, see also Total Device spec)VCC, VC: 30V; (2)Total Power Supply and Zener Current(ICC + IZ): 30mA; (3)Output Current, Source or SinkIO: 1.0A; (4)Output Energy (Capacitive Load per Cycle)W: 5.0mJ; (5)Current Sense and Voltage Feedback InputsVin: 0.3 to + 5.5V; (6)Error Amp Output Sink CurrentIO: 10mA.
Features
UC2843BD features: (1)Trimmed Oscillator for Precise Frequency Control; (2)Oscillator Frequency Guaranteed at 250 kHz; (3)Current Mode Operation to 500 kHz; (4)Automatic Feed Forward Compensation; (5)Latching PWM for Cycle-By-Cycle Current Limiting; (6)Internally Trimmed Reference with Undervoltage Lockout; (7)High Current Totem Pole Output; (8)Undervoltage Lockout with Hysteresis; (9)Low Startup and Operating Current; (10)Pb-Free Packages are Available.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 UC2843BD |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM |
Data Sheet |
Negotiable |
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UC2843BD1 |
STMicroelectronics |
Current Mode PWM Controllers PWM CONTROLLER |
Data Sheet |
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UC2843BD1013TR |
STMicroelectronics |
Current Mode PWM Controllers 0.5mA Current Mode |
Data Sheet |
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UC2843BD1G |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM w/96% Duty Cycle Max |
Data Sheet |
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UC2843BD1R2 |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM |
Data Sheet |
Negotiable |
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UC2843BD1R2G |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM w/96% Duty Cycle Max |
Data Sheet |
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UC2843BDG |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM w/96% Duty Cycle Max |
Data Sheet |
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UC2843BDR2 |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM |
Data Sheet |
Negotiable |
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