30W Active Clamp Flyback PWM Controller
The device provides ease-of-design of a simple flyback controller with all the benefits of an ACF design, including recycling of the flyback transformer leakage energy and clamping of the primary FET drain voltage. Employing Silanna's OptiMode™ digital control architecture, the SZ1110 adjusts the devices's mode of operation on a cycle-by-cycle basis to maintain high efficiency, low EMI, and fast dynamic load regulation.
Unlike conventional ACF designs, tight tolerances of the clamp capacitor and leakage inductance values are not required for proper operation of the circuit. Moreover, a small 3.3nF clamp capacitor is sufficient to realize the benefits of ACF operation. The SZ1110 is well suited for high efficiency and high-power density AC/DC power adapters. The device is designed for up to 30 w output power, including USB PD and Quick Charge applications.
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Application note & Design Guide |
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Please see the document for details |
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SOD |
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English Chinese Chinese and English Japanese |
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2/26/2021 |
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Ver. 1.0 |
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11380;AN1110 |
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2.5 MB |
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