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SF4711
The SF4711 is a high-precision, highly integrated BCM high-voltage step-down power switch suitable for offline low-power converter applications. It has a built-in power BJT to further reduce system costs. The SF4711 integrates a proprietary NC-Cap/HV step-down ITM series for CV control, eliminating the need for external compensation or filter capacitors. A built-in cable voltage drop compensation function provides excellent CV performance. The IC uses multi-mode control to improve efficiency and reliability and reduce audio noise energy at light loads. The SF4711 integrates proprietary "audio noise reduction" control to achieve audio noise-free operation. The IC features built-in "fast dynamic response" control to meet USB charging requirements. The SF4711 also integrates proprietary "zero output start" control to enable startup when the output voltage is near zero. The IC features proprietary "intelligent output short-circuit protection" to protect systems with large leakage inductance during output short circuits. The SF4711 integrates FB short-circuit protection, undervoltage lockout (UVLO), VDD overvoltage protection (VDD OVP), soft start, cycle-by-cycle current limiting (OCP), pin float protection, and VDD clamping functions and protections. The SF4711 is available in a SOT23-6 package.
Category：
- Product Description
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- Commodity name: SF4711
- 封装: SOT23-6
- 品牌: Saiwei Technology
The SF4711 is a high-precision, highly integrated BCM high-voltage step-down power switch suitable for offline low-power converter applications. It has a built-in power BJT to further reduce system costs. The SF4711 integrates a proprietary NC-Cap/HV step-down ITM series for CV control, eliminating the need for external compensation or filter capacitors. A built-in cable voltage drop compensation function provides excellent CV performance. The IC uses multi-mode control to improve efficiency and reliability and reduce audio noise energy at light loads. The SF4711 integrates proprietary "audio noise reduction" control to achieve audio noise-free operation. The IC features built-in "fast dynamic response" control to meet USB charging requirements. The SF4711 also integrates proprietary "zero output start" control to enable startup when the output voltage is near zero. The IC features proprietary "intelligent output short-circuit protection" to protect systems with large leakage inductance during output short circuits. The SF4711 integrates FB short-circuit protection, undervoltage lockout (UVLO), VDD overvoltage protection (VDD OVP), soft start, cycle-by-cycle current limiting (OCP), pin float protection, and VDD clamping functions and protections. The SF4711 is available in a SOT23-6 package.
Features
◆ Built-in 800V power bipolar transistor and start-up resistor
◆ Low-cost bipolar transistor direct drive
◆ CV mode control
◆ Operating in BCM
◆ Cycle-by-cycle current limit
◆ Leading edge blanking (LEB)
◆ Pin floating protection
◆ VDD UVLO, clamping
Applications
◆ Emergency lights
◆ Household appliances
Product Message
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Official Account
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Company Address：
Room 819, Dongmei Building, Xiangnan Three District, Minqiang Community, Minzhi Street, Longhua District, Shenzhen
