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SF1585
The SF1585 is a high-performance, cost-effective, and highly integrated current mode PWM controller suitable for large and medium-sized offline flyback power converter applications. In the SF1585, 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 reduces the switching frequency according to the proprietary η-balancing TM series to improve power conversion efficiency at light loads. When the current setpoint is below a given value, such as when the output power demand decreases, the IC enters burst mode and provides excellent efficiency with no audio noise. The SF1585 uses SiFirst's proprietary control algorithm to achieve "zero OCP/OPP recovery gap". It also incorporates a proprietary "audio noise-free OCP compensation" to achieve constant power limiting and enable audio noise operation under heavy loads when the line input is approximately 90VAC. The SF1585 integrates undervoltage lockout (UVLO), VCC overvoltage protection (OVP), cycle-by-cycle current limiting (OCP), externally programmable overtemperature protection (OTP), all-pin floating protection, overload protection (OLP), gate clamping, VCC clamping, leading edge blanking (LEB), and other functions and protections. In the SF1585, OTP and VDD OVP are latching plug protections. Other protection functions are automatic recovery mode protections. The SF1585 is available in SOT23-6 and DIP-8 packages.
Category：
- Product Description
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- Commodity name: SF1585
- 封装: SOT23-6
- 品牌: Saiwei Technology
The SF1585 is a high-performance, cost-effective, and highly integrated current mode PWM controller suitable for large and medium-sized offline flyback power converter applications. In the SF1585, 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 reduces the switching frequency according to the proprietary η-balancing TM series to improve power conversion efficiency at light loads. When the current setpoint is below a given value, such as when the output power demand decreases, the IC enters burst mode and provides excellent efficiency with no audio noise. The SF1585 uses SiFirst's proprietary control algorithm to achieve "zero OCP/OPP recovery gap". It also incorporates a proprietary "audio noise-free OCP compensation" to achieve constant power limiting and enable audio noise operation under heavy loads when the line input is approximately 90VAC. The SF1585 integrates undervoltage lockout (UVLO), VCC overvoltage protection (OVP), cycle-by-cycle current limiting (OCP), externally programmable overtemperature protection (OTP), all-pin floating protection, overload protection (OLP), gate clamping, VCC clamping, leading edge blanking (LEB), and other functions and protections. In the SF1585, OTP and VDD OVP are latching plug protections. Other protection functions are automatic recovery mode protections. The SF1585 is available in SOT23-6 and DIP-8 packages.
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