Manufacturer:
onsemi
UC3844BNG
Current Mode PWM Controller 1A 8-Pin PDIP Rail
Avnet Manufacturer Part #:
UC3844BNG
RoHS 10 Compliant
The UC3844BNG is a high-performance fixed frequency current-mode Pulse Width Modulation (PWM) Controller specifically designed for off-line and DC to DC converter applications offering the designer a cost-effective solution with minimal external components. It features an oscillator, 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, a latch for single pulse metering and a flip-flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50 to 70%.
Key Features
- Trimmed oscillator for precise frequency control
- Automatic feed forward compensation
- Internally trimmed reference with undervoltage lockout
- High current totem pole output
- Undervoltage lockout with hysteresis
- Low startup and operating current
Technical Attributes
Find Similar Parts|
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Description | Value |
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Switching Frequency Min | 49 kHz |
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Product Range | UC3844B Series |
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Operating Temperature Min | 0 °C |
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IC Mounting | Through Hole |
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IC Case / Package | PDIP |
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Control Mode | Current Mode Control |
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Switching Frequency Max | 55 kHz |
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Output Current Max | 1 A |
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Supply Voltage Max | 36 V |
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Power Supply Controller Type | Single Ended Controller |
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Supply Voltage Min | 11.5 V |
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Duty Cycle Min | 0 % |
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Switching Frequency Typ | 52 kHz |
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Operating Temperature Max | 70 °C |
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Duty Cycle Max | 50 % |
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Topology | Boost, Flyback, Flyback, In |
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No. of Channels | 1 |
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No. of Pins | 8 |
ECCN / UNSPSC / COO
| Description | Value |
|---|---|
| ECCN: | EAR99 |
| SCHEDULE B: | PARTS... |
| HTSN: | PARTS... |