High Frequency Current Sense Transformer CT11 Series for SMPS and Lighting Control
The CT11 series PCB-mount high-frequency current sense transformer is designed for switching power supply (SMPS) applications. It provides output feedback signals to pulse control circuits, enabling low-cost power regulation.Rated primary current is 25A (maximum 40A). Frequency range is up to 500kHz.The product uses a high-permeability ferrite core. Seven standard turns ratio options are available: 1:50, 1:100, 1:150, 1:200, 1:300, 1:500, and 1:1000, suitable for different detection accuracy requirements.The low-profile PCB-mount design is available in multiple structural styles.It is widely used in switching power supplies, lighting control, and switch control applications.
- High frequency current transformers for SMPS appllications
- High-permeability ferrite current transformers
- Low-profile current transformers
- PCB mount current transformers
- Reliable linear performance transformers
- Turns Ratio: 1:50 1:100,1:150,1:200,1:300,1:500,1:1000 available
- Many differennt kinds of structure and style for your selection.
- Custom-made are welcome.
- Current sense transformers provide output feedback to the pulse control circuitry allowing low-cost regulation of switch-mode power supplies
- 25A Rated primary current(40A Max)
- 500kHz maximum frequency
- switch-mode power supplies
- lighting
- switch controls
- Insulation resistance: 500V DC >100MΩ
- Hi-Pot : 4000V 1mA 60S
- Temperature range: -40℃ to +125℃
- Storage Temperature: -40℃ to +125℃
- Resistance to soldering heat:260℃ for 10 seconds
- Marking: Part number and date code
Notes: Product specifications can be customized
Q: What is the function of the CT11 series in switching power supplies?
A: The CT11 series current sense transformer detects primary side current and provides feedback signals to the pulse control circuit, enabling low-cost closed-loop regulation for switching power supplies. By sensing current changes, the control circuit adjusts the PWM duty cycle to achieve output voltage regulation and overcurrent protection.
Q: How to choose the right turns ratio?
A: Turns ratio selection depends on the primary current range and the required secondary sampling voltage. A lower turns ratio (e.g., 1:50) has fewer secondary turns, higher output current, and is suitable for larger current sensing. A higher turns ratio (e.g., 1:1000) has more secondary turns, lower output current, and is suitable for smaller currents or applications requiring higher output voltage. We recommend selecting based on the peak primary current and the sensitivity of the downstream sampling circuit.
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