代理產線

SC441A

 2013-07-17

【基本資料】

【產品特性】

+/- 2% string-to-string current matching
1. Up to 90% efficiency
2. Wide 0.2% to 100% PWM dimming range
3. Possible analog dimming
4. Integrated 3.0A power switch
5. 700KHz switching frequency for small size
6. Adjustable OVP for cost-effective output cap selection
7. Open/short LED protection
8. Thermal protection with auto-recovery


1. Wide input voltage range from 4.5V to 21V
2. 36V maximum output voltage
3. Drives up to 40 WLEDs in 4 strings
4. Programmable LED current for up to 150mA per string
5. +/- 2% string-to-string current matching
6. Up to 90% efficiency
7. Wide 0.2% to 100% PWM dimming range
8. Possible analog dimming
9. Integrated 3.0A power switch
10. 700KHz switching frequency for small size
11. Adjustable OVP for cost-effective output cap selection
12. Open/short LED protection
13. Thermal protection with auto-recovery
14. Thermally enhanced TSSOP-20 EDP package
15. Fully WEEE and RoHS compliant
16. AEC-Q100 Grade 3 qualified


【產品應用】

1. Medium-sized LCD panel
2. Notebook Display
3. Automotive Car Navigation Display
4. Sub-Notebook and Tablet Computer Displays
5. Portable Media Players

【文字介紹】

SC441C是一個內含升壓線路的高效率可多串的白光LED驅動器.它擁有4.5~27V的高壓輸入和42V/2.5A 的高輸出負載.可驅動高至48顆的白光LED且LED電流可至150mA.每一串對串的電流準確度可達±2%.因為它有很低阻抗的電源開關及低的電流回授電壓.所以效率可以輕易的超過90%.
SC441的切換頻率可以達700KHZ.可以去節省外部零件線路.在保護線路方面包括了LED 開路及短路保護.過電壓保護等等.重要的是SC441即將通過車用規格AEC-Q100.所以日後在汽車市場上的照明設備上將更有競爭力