(China (Mainland))
Product Summary
The UC2843BD is a High Performance Current Mode Controller. It is specifically designed for Off-Line and DC-DC converter applications offering the designer a cost-effective solution with minimal external components. The UC2843BD features 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. The UC2843BD is 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).
Parametrics
UC2843BD absolute maximum ratings: (1)Bias and Driver Voltages (Zero Series Impedance, see also Total Device spec) VCC, VC: 30 V; (2)Total Power Supply and Zener Current (ICC + IZ): 30 mA; (3)Output Current, Source or Sink IO: 1.0 A; (4)Output Energy (Capacitive Load per Cycle) W: 5.0 μJ; (5)Current Sense and Voltage Feedback Inputs Vin: -0.3 to + 5.5 V; (6)Error Amp Output Sink Current IO: 10 mA; (7)Operating Junction Temperature TJ: +150 ℃; (8)Operating Ambient Temperature: -25 to + 85 ℃; (9)Storage Temperature Range Tstg: -65 to +150 ℃.
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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 UC2843BD1G |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM w/96% Duty Cycle Max |
Data Sheet |
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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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UC2843BDR2 |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM |
Data Sheet |
Negotiable |
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UC2843BDR2G |
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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UC2843BD1R2 |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM |
Data Sheet |
Negotiable |
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UC2843BD1013TR |
STMicroelectronics |
Current Mode PWM Controllers 0.5mA Current Mode |
Data Sheet |
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UC2843BD1 |
STMicroelectronics |
Current Mode PWM Controllers PWM CONTROLLER |
Data Sheet |
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