UC3843BDR2G Integrated Circuits (ICs) |
|
| Allicdata Part #: | UC3843BDR2GOSTR-ND |
| Manufacturer Part#: |
UC3843BDR2G |
| Price: | $ 0.15 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | ON Semiconductor |
| Short Description: | IC REG CTRLR FLYBACK 14SOIC |
| More Detail: | Boost, Flyback Regulator Positive Output Step-Up, ... |
| DataSheet: |  UC3843BDR2G Datasheet/PDF |
| Quantity: | 1000 |
| 2500 +: | $ 0.13476 |
| 5000 +: | $ 0.12606 |
| 12500 +: | $ 0.11737 |
| 25000 +: | $ 0.11128 |
Specifications
| Frequency - Switching: | Up to 500kHz |
| Base Part Number: | UC384*B |
| Supplier Device Package: | 14-SOIC |
| Package / Case: | 14-SOIC (0.154", 3.90mm Width) |
| Operating Temperature: | 0°C ~ 70°C (TA) |
| Control Features: | Frequency Control |
| Serial Interfaces: | -- |
| Clock Sync: | No |
| Synchronous Rectifier: | No |
| Duty Cycle (Max): | 96% |
| Series: | -- |
| Voltage - Supply (Vcc/Vdd): | 7.6 V ~ 30 V |
| Output Phases: | 1 |
| Number of Outputs: | 1 |
| Topology: | Boost, Flyback |
| Output Configuration: | Positive |
| Function: | Step-Up, Step-Up/Step-Down |
| Output Type: | Transistor Driver |
| Part Status: | Active |
| Packaging: | Tape & Reel (TR) |
Description
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The UC3843BDR2G is a polyphase, current-mode Pulse Width Modulation (PWM) controller that enables the realization of high-performance DC-DC switching regulators. This PWM controller offers improved performance and reduced external components. It can compensate for the overshoot and undershoot of the output voltage by minimizing the effects of varying input and load conditions.
Application Field
The UC3843BDR2G can be used in a variety of applications, including in DC-DC switching regulators, switch mode power supplies, lighting control, AC/DC controllers, and motor control. It is widely used in telecom and automotive applications, due to its multiphase operation and high power efficiency.Working Principle
This device utilizes a current-mode control, which works by monitoring and controlling the voltage of the output stage. This is done by comparing the variation of the input signal with the output voltage, and using a PWM signal to the drive the switch. When the input signal exceeds the output voltage, the controller will increases the duty cycle (amount of time the switch is on) of the signal, and decrease it when the input voltage is lower than the output voltage. This ensures that the output voltage remains at a constant level.The UC3843BDR2G uses an internal dead-time circuit that prevents short circuiting by resetting the output voltage when it is greater than an overshoot threshold value. This control circuit also contains a wide range of protection features, such as input current limitation, short circuit protection, and thermal shutdown, further ensuring reliable operation.Conclusion
The UC3843BDR2G is an advanced DC-DC switching controller that can be used in a variety of applications, including switching regulators, power supplies, lighting, and motor control. It utilizes a current-mode control and contains many safety features, making it an ideal choice for applications where high power efficiency and reliability is a must.The specific data is subject to PDF, and the above content is for reference
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