深圳市鸿宇电子科技有限公司
主营产品:
集成IC:
主营品牌:NIIKOS、SIFIRST、UTC、SIPOWER、芯联、微盟、RZC、TXC（晶振）
产品封装:SOT-23-6 . DIP-7. SOT-32-5 .
贴片二.三极管:
主营品牌:ST ON NXP长电ROHM东芝.
产品封装:SOT-23 . SOT-89 . SOD-323 . SOD-123 . SOD-523 .LL34 . DO-214AC(SMA) .
贴片电容:
主营品牌:国巨风华 高科三星TDK村田华新科技 太诱
产品封装:0201 0402 0603 0805 1206 1210 0.
贴片电阻:
主营品牌:厚声 丽智风华高科国巨 旺诠华新科技.
产品封装:0201 0402 0603 0805 1206 1210 0.
贴片钽电容:
主营品牌:AVX 基美 NEC三星
产品封装:0603 0805 3216(A型) 3528(B型) 6032(C型) 7343(D型) 7343H (E型)
贴片磁珠:
主营品牌:台庆. JW.顺络.风华高科.
产品封装:0201 0402 0603 0805 1206 1812.
贴片电感:
主营品牌:台产.顺络.TDK
产品封装:0201 0402 0603 0805 1206 1812.
24小时技术支持
Q Q: 2629841296
集成IC：SF5773
产品特点：
1.η-Balance 专利技术，提升效率；6级能效；
2.外置MOS管，系统设计灵活，可获得更大输出功率； 3.内置抖频功能，改善EMC。内置软启动功能； 4.优化降频，提高轻载效率。待机功耗≤75mW；
5.适用于对待机功耗、性能有要求的大功率场合；
6.封装形式SOT23-6
SF5773
EPS Level 6
- Easily Meet EPS Level 6
- Proprietary QR-||TM Technology: Digital Anti-jitter for Audio Noise Free Operation, Digital Frequency Foldback, Digital Frequency Jittering for Better EMI
- Less than 100mW Standby Power
- Multi-Mode Operation for High Efficiency
- 12.7us Maximum Duty Cycle.
- 80KHz Maximum On Time
- 52KHz Frequency Low Clamping in QR Mode
- 65% Maximum Duty Cycle
- Adaptive Slope Compensation for CCM Mode
- Built-in soft start function
- Built-in synchronous slope compensation
- Constant power limiting
Application:
Offline AC/DC fly-back converter for
- AC/DC adapters
- Open-frame SMPS
- Set-top box power supplies
- ATX standby power
SF5773 is a high performance, 2nd Generation Quasi-Resonant (QR-||TM) PWM controller for offline flyback power converter applications. The built-in proprietary QR-||TM technology with high level protection features improves the SMPS reliability and performance.
In SF5773, the "Digital Anti-Jitter' function can automatically select and lock a valley at a given loading, which can achieve audio noise free operation. On the other hand, the "Digital Frequency Jittering" function makes the system have superior EMI performance than conventional QR system.
SF5773 is a multi mode controller. When full loadings, the IC works in CCM mode or QR mode based on the AC line input . When the loading goes low, the IC enters into "Digital Frequency Foldback" mode to boost power conversion efficiency. When the output power is very small, the IC enters into burst mode and can achieve less than 100mW no load power.
SF5573 integrates functions and protections of Under Voltage Lockout (UVLO), VCC Over Voltage Protection (OVP), Output Over Voltage Protection (Output OVP), cycle-by-cycle Current Limiting (OCP), pins Floating Protection, Over load Protection (OLP), Soft Start , VCC Clamping, Gate Clamping, In SF5773, the protection functions are auto-recovery mode protection.
SF5773 is available in SOT23-6 packages.
应用领域:
1.LED照明驱动；
2.手机/无绳电话、PADS、数码相机、MP3等产品的充电器，适配器；
3.小功率电源适配器；
4.电脑、电视等产品的辅助电源或待机电源；