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SF5533P
The SF5533P is a high-performance, high-efficiency, and highly integrated current mode PWM controller suitable for offline flyback converter applications. The OLP debounce time can be programmed according to the SF5533P. In the SF5533P, the PWM switching frequency with random playback is fixed at 65KHz and is adjusted to a narrower range. When the output power demand decreases, the IC will reduce the switching frequency according to the proprietary η-balance TM series control to improve the power conversion efficiency at light loads. When the output power is below a given value, the IC enters burst mode, and the no-load power can be reduced to below 75mW. This IC can achieve "zero OCP/OPP recovery gap" using SiFirst's proprietary control algorithm. The SF5533P also incorporates a proprietary "audio noise-free OCP compensation" to achieve constant power limiting and audio noise operation under heavy loads when the line input is approximately 90VAC. The SF5533P integrates undervoltage lockout (UVLO), VDD overvoltage protection (OVP), cycle-by-cycle current limiting (OCP), pin float protection, overload protection (OLP), gate clamping, RT pin to ground short circuit protection, leading edge blanking (LEB), soft start, and other functions and protections. The SF5533P is available in a SOT23-6 package.
Category：
- Product Description
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- Commodity name: SF5533P
- 封装: SOT23-6
- 品牌: Saiwei Technology
The SF5533P is a high-performance, high-efficiency, and highly integrated current mode PWM controller suitable for offline flyback converter applications. The OLP debounce time can be programmed according to the SF5533P. In the SF5533P, the PWM switching frequency with random playback is fixed at 65KHz and is adjusted to a narrower range. When the output power demand decreases, the IC will reduce the switching frequency according to the proprietary η-balance TM series control to improve the power conversion efficiency at light loads. When the output power is below a given value, the IC enters burst mode, and the no-load power can be reduced to below 75mW. This IC can achieve "zero OCP/OPP recovery gap" using SiFirst's proprietary control algorithm. The SF5533P also incorporates a proprietary "audio noise-free OCP compensation" to achieve constant power limiting and audio noise operation under heavy loads when the line input is approximately 90VAC. The SF5533P integrates undervoltage lockout (UVLO), VDD overvoltage protection (OVP), cycle-by-cycle current limiting (OCP), pin float protection, overload protection (OLP), gate clamping, RT pin to ground short circuit protection, leading edge blanking (LEB), soft start, and other functions and protections. The SF5533P is available in a SOT23-6 package.
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