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LT3825EFE
+BOMSwitching Voltage Regulators LT3825 - Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range
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Nhà sản xuấtAnalog Devices
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Ông. Phần #LT3825EFE
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Bảng dữ liệu LT3825EFE DataSheet
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Description
Key features include programmable switching frequency, current-mode control, and robust overcurrent protection. It also offers a start-up feature from high-impedance source VIN, which is useful in energy-efficient systems. The device is housed in a thermally enhanced 16-lead TSSOP package, optimizing it for space-limited and heat-sensitive applications.
The LT3825EFE's integrated slope compensation and feedback loop simplify design and improve system stability. It is well-suited for industrial, telecommunications, and automotive applications where reliability and compact form factor are essential. Overall, the LT3825EFE provides a flexible and efficient solution for demanding power management tasks.
Features
Key features include high efficiency due to its synchronous rectification capability, which minimizes power loss during operation. It offers a constant-frequency, current-mode control architecture, which ensures excellent transient response and easy loop compensation. The LT3825EFE also includes an adjustable switching frequency from 100kHz to 500kHz, allowing designers to optimize the trade-off between efficiency and component size.
Additional features include programmable soft-start, which helps manage inrush current during start-up, as well as a power good output for system monitoring. The device also incorporates protection features like overvoltage and overcurrent protection, enhancing reliability in demanding environments. Overall, the LT3825EFE is highly versatile, providing efficient and reliable performance for various power management applications.
Pinout
1. VIN: Input supply voltage.
2. UVLO: Undervoltage lockout threshold setting.
3. SS (Soft-Start): Soft-start control for limiting inrush current.
4. ILIM (Current Limit): Sets the current limit threshold.
5. FB (Feedback): Receives feedback voltage from the output.
6. COMP: Compensation for the error amplifier.
7. GND: Ground reference.
8. DRIVE: Drives the gate of the external MOSFET.
9. SENSE: Senses current through an external sense resistor.
10. SYNC: Synchronizes the switching frequency to an external clock.
11. RT (Timing Resistor): Sets the switching frequency.
12. VCC: Supply voltage for internal circuits.
13. PGOOD (Power Good): Indicates when the output is within regulation.
14. RUN/SS: Controls the run and soft-start functions.
15. BG (Boost Ground): Ground for the gate drive.
16. BOOST: Bootstrap capacitor connection for driving the high-side MOSFET gate.
These pins collectively support the controller’s functions such as voltage regulation, synchronization, protection, and control.