| Allicdata Part #: | UC3844BVDGOS-ND |
| Manufacturer Part#: |
UC3844BVDG |
| Price: | $ 0.27 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | ON Semiconductor |
| Short Description: | IC REG CTRLR PWM CM 14-SOIC |
| More Detail: | Boost, Flyback Regulator Positive Output Step-Up, ... |
| DataSheet: |  UC3844BVDG Datasheet/PDF |
| Quantity: | 1000 |
| 770 +: | $ 0.24860 |
| 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: | -40°C ~ 105°C (TA) |
| Control Features: | Frequency Control |
| Serial Interfaces: | -- |
| Clock Sync: | No |
| Synchronous Rectifier: | No |
| Duty Cycle (Max): | 48% |
| Series: | -- |
| Voltage - Supply (Vcc/Vdd): | 10 V ~ 36 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: | Tube |
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UC3844BVDG Application Field and Working Principle
Introduction
The UC3844BVDG is a high-performance pulse width modulation controller that is housed in the compact 8-pin mini-DIP package. Developed by ON Semiconductor, it works as a low-power DC-DC switching converter with multiple features. As one of the advanced members of the UC38800 family, it is perfect for applications with limited space and is suitable for a wide range of power supplies, including offline and DC to DC converters, as well as inductive load drivers.
Application Field
The UC3844BVDG is designed for those applications where low output voltage and low cost are required. It has a wide input voltage range of up to 1 volts and its output voltage is adjustable from 0.2 to 12.6 volts. This makes it suitable for use in a wide variety of power supplies and inverter systems. It is also capable of operating at high speeds and can achieve a PWM frequency of up to 25kHz. In addition, the UC3844BVDG also has good electrical characteristics, such as low startup current, low operating current, low thermal resistance and high efficiency. Due to these characteristics, it is ideal for use in small-sized power supplies.
Working Principle
The UC3844BVDG operates on a standard peak current mode control. The controller continuously monitors the output of the secondary power supply and compares it with the ramp voltage when PWM switching is being undertaken. If the voltage at the secondary output is above the ramp voltage, then PWM switching will be performed; otherwise, it will be stopped until the output voltage is again higher than the ramp voltage. This ensures that the output voltage is always within pre-set limits and will not go too high or low. In addition, the UC3844BVDG also features a soft start circuit to ensure the output voltage rises slowly and steadily over time.
Conclusion
The UC3844BVDG is an advanced pulse width modulation controller from ON Semiconductor that is designed for low cost and low output voltage applications. It has a wide input voltage range and can achieve a PWM frequency of up to 25kHz. It also features low startup current, low operating current, low thermal resistance and high efficiency. It is ideal for use in small-sized power supplies and inverter systems. The UC3844BVDG operates on the standard peak current mode control and ensures that the output voltage is always within pre-set limits.
The specific data is subject to PDF, and the above content is for reference
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