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UC3825ADW
Dual 2 A, 1000 kHz
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製造商零件號 # : UC3825ADW
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包裝/封裝: SOIC-16
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製造商: Texas Instruments
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產品分類 : DC DC Switching Controllers
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UC3825ADW 數據表
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詳細說明
One of the standout features of the UC3825ADW is its programmable oscillator, which grants users the freedom to customize the switching frequency to their specific needs. This flexibility makes the device adaptable to various design requirements, enabling engineers to fine-tune their power supply designs for maximum performance. The inclusion of a voltage feedforward control loop further enhances the load regulation of the power supply, ensuring stable and reliable operation across different load conditions
主要特徵
應用
- Ensures high-frequency pulse-width modulation
- Optimal for power management systems
規格
以下是所選零件的基本參數，涉及零件的特性及其所屬類別。
| Topology | Boost, Buck, Flyback, Forward, Full bridge, Half bridge, Push pull | Control mode | Current, Voltage |
| Duty cycle (max) (%) | 50 | Switching frequency (max) (kHz) | 1000 |
| Features | Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Leading edge blanking, Multi-topology, Programmable max duty cycle, Soft start, Synchronization pin | UVLO thresholds on/off (V) | 9.2/8.4 |
| Operating temperature range (°C) | 0 to 70 | Rating | Catalog |
| Gate drive (typ) (A) | 2 | Vin (max) (V) | 22 |
數據表 PDF
數據表記錄了器件的特性、絕對最大額定值、應用等，這對於作為器件特定應用的整體指南大有裨益。
常見問題解答
What is UC3825ADW?
The UC3825ADW is a high-performance, current-mode PWM controller designed by Texas Instruments. It is commonly used in power supply applications to regulate the output voltage and control the power delivery to various electronic devices.
How Does UC3825ADW Work?
The UC3825ADW operates as a current-mode PWM controller, where it compares a current signal representing the output voltage with a reference voltage to generate a control signal that adjusts the duty cycle of the PWM waveform. This control method provides fast transient response and inherent current limiting, making it suitable for power supply designs.
How Many Pins does UC3825ADW have and What are the Functions of the Pinout Configuration?
The UC3825ADW is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:
- VCC: Power supply pin.
- COMP: Compensation pin for loop stability.
- RT/CT: Timing components (resistor and capacitor) for setting oscillator frequency.
- UVLO: Under Voltage Lock-Out control pin.
- SD, +SENSE, -SENSE: Shutdown and current sense pins.
- FB: Feedback pin for output voltage regulation.
- OUTA, OUTB: PWM outputs for driving external power switches.
What are the Pros and Cons of UC3825ADW?
Pros:
- Current-Mode Control: Offers fast transient response and inherent current limiting.
- Wide Input Voltage Range: Suitable for various power supply designs.
- Protection Features: Includes under-voltage lockout and shutdown pins for system protection.
- External Clock Synchronization: Supports synchronization to an external clock signal.
- Enhanced Efficiency: Improves power conversion efficiency in power supply applications.
Cons:
- Complex Design: Requires careful consideration of loop stability and component selection for optimal performance.
- External Components: May need additional external components for specific application requirements.
- Noisier Operation: Current-mode control can introduce noise in certain circuit layouts.
Are There Any Equivalents/Alternatives to UC3825ADW for Recommendation?
- The UC3842 from Texas Instruments is a similar current-mode PWM controller with slightly different features.
- Alternatives to the UC3825ADW include the SG3525A from STMicroelectronics and the IR2153 from Infineon Technologies.
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