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SF1528
The SF1528 is a high-performance, high-efficiency, and highly integrated current mode PWM controller suitable for offline flyback converter applications. In the SF1528, 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-balancing TM series control to improve 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 SF1528 also incorporates a proprietary "audio-free OCP compensation" to achieve constant power limiting and audio noise operation under heavy loads when the line input is approximately 90VAC. The SF1528 integrates functions and protection features such as undervoltage lockout (UVLO), VDD overvoltage protection (OVP), cycle-by-cycle current limiting (OCP), pin float protection, overload protection (OLP), gate clamping, VDD clamping, leading edge blanking (LEB), and soft start. The SF1528 is available in an ESOP-6 package.
Category：
- Product Description
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- Commodity name: SF1528
- 封装: ESOP6
- 品牌: Saiwei Technology
The SF1528 is a high-performance, high-efficiency, and highly integrated current mode PWM controller suitable for offline flyback converter applications. In the SF1528, 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-balancing TM series control to improve 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 SF1528 also incorporates a proprietary "audio-free OCP compensation" to achieve constant power limiting and audio noise operation under heavy loads when the line input is approximately 90VAC. The SF1528 integrates functions and protection features such as undervoltage lockout (UVLO), VDD overvoltage protection (OVP), cycle-by-cycle current limiting (OCP), pin float protection, overload protection (OLP), gate clamping, VDD clamping, leading edge blanking (LEB), and soft start. The SF1528 is available in an ESOP-6 package.
◆ Standby power consumption less than 75mW
◆ Built-in 650V super junction power MOSFET proprietary η -Balance TM series Control to improve light load efficiency
◆ Proprietary "zero OCP/OPP recovery gap" control
◆ Proprietary "audio noise-free OCP compensation"
◆ Dmax up to 80%
◆ Fixed 65KHz switching frequency
◆ Built-in frequency conversion
◆ Built-in soft start function
◆ Frequency reduction and burst mode control, energy saving
◆ Built-in synchronous slope compensation
◆ Cycle-by-cycle current limit
◆ Built-in leading edge blanking (LEB)
◆ Current mode control
◆ Pin floating protection
◆ Ultra-low start-up current
◆ Audio noise-free operation
◆ VDD UVLO, OVP and Clamp
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