iW3623丰富的组合集成功能使其成为非调光、商业SSL聚光灯、PAR、T8和平板吸顶灯等各种应用的理想解决方案。
iW3623采用Dialog的PrimAccurate原边控制专利技术，消除所需的次级调节器和光耦器件，从而节省BOM成本。同时，以低成本双极结型晶体管(BJT)替换场效应晶体管(FET)。采用BJT开关管可降低解决方案总体成本，但实现高转换效率面临挑战。为解决这个问题，iW3623升压和反激级均采用准谐振式开关技术和动态基极电流驱动技术，优化转换效率并降低电磁干扰(EMI)。此外，Dialog的EZ-EMI??技术简化EMI滤波，进一步减少外部器件数量。
大部分电源IC设计具有热关断功能，这种功能只是在高温环境下关断IC。这种方法可以保护IC，但不能保护LED驱动器电路。iW3623含有强大的内置过温保护和降额功能，可监控密封SSL灯泡内部实际的温度。过温保护功能通过NTC电阻配置。当灯泡内的温度条件达到设定温度时，iW3623自动逐渐减小LED驱动电流，从而降低功耗，使灯泡工作温度下降，防止系统中电解电容的温度超过温度额定值。降额功能使电容能够达到SSL灯最大使用寿命，实现灯泡的预期使用寿命。减小驱动电流时亮度减弱微乎其微，因此用户感觉不到亮度的变化。在极端温度条件下，iW3623将关断LED的驱动电流，避免安全和火灾风险。
此外，iW3623安全功能包括LED开路/短路、单点故障、过流、电流取样电阻短路、输入过压、憋灯和AC线路过压/频率保护。输出过压条件下，iW3623进入延长放电模式，同时保持快速恢复，支持LED模块热插拔，不会产生危险的高输出电压。
iW1810 3W(10V350mA), AC input (90-264)Vac, GU 10
iW1678/1706 2W(55V30mA), AC input (180-264)Vac, Candle Lamp
iW1678/1706 3W(110V30mA), AC input (180-264)Vac, Candle Lamp
iW1678/1706 6W(32V200mA), AC input (180-264)Vac, Candle Lamp
iW1678/1706 5W(16V350mA), AC input (90-264)Vac, Bulb Lamp
iW1678/1706 6W(100V60mA), AC input (90-135)Vac, Bulb Lamp
iW1706-00 6W(30V200mA), AC input (180-264)Vac, Bulb Lamp
iW1678/1706 7W(18V500mA), AC input (90-264)Vac, Bulb Lamp
iW3620 8W(27V350mA), AC input (90-264)Vac, Bulb Lamp
iW3620 9W(30V350mA), AC input (90-264)Vac, Bulb Lamp
iW3620 10W(38V280mA), AC input (90-264)Vac, Bulb Lamp
iW3620 15W(38V400mA), AC input (90-264)Vac, Bulb Lamp
iW3620 18W(40V450mA), AC input (90-264)Vac, T8
iW3620 30W(32V700mA), AC input (90-264)Vac, EX T8
iW3620 21W(24V1A), AC input (90-264)Vac, EX T8
iW3620 iW3620 Street light Module 20W*8
iW3623 18W(40V450mA), AC input (90-264)Vac, T8
iW3623 17W(24V700mA), AC input (90-264)Vac,EX Driver
iW3623 28W(40V700mA), AC input (90-264)Vac,EX Driver
SSL(dimmable):
iW3602-00 3W(10V350mA), AC input (90-135)Vac, Candle Lamp
iW3602-01 3W(12V400mA), AC input (90-135)Vac, GU 10
iW3602-01 3W(12V400mA), AC input (180-264)Vac, GU 10
iW3602-01/3612 4W(13V350mA), AC input (90-135)Vac, Bulb Lamp
iW3602-01/3612 4W(13V350mA), AC input (180-264)Vac, Bulb Lamp
iW3614-00 9W(30V350mA), AC input (90-135)Vac, Bulb Lamp
iW3614-00 9W(30V350mA), AC input (180-264)Vac, Bulb Lamp
iW3614-00 12W(40V350mA), AC input (90-135)Vac, PAR38
iW3614-00 12W(40V350mA), AC input (180-264)Vac, PAR38
iW3614-00 18W(21V700mA), AC input (90-135)Vac, PAR38
iW3614-00 18W(21V700mA), AC input (180-264)Vac, PAR38
iW3616-00 9W(30V350mA), AC input (90-135)Vac, Bulb Lamp
iW3616-01 9W(30V350mA), AC input (180-264)Vac, Bulb Lamp
iW3616-00 15W(24V620mA), AC input (90-135)Vac, Bulb Lamp
iW3616-01 15W(24V620mA), AC input (180-264)Vac, Bulb Lamp
iW3617-00 28W(40V700mA), AC input (90-135)Vac,EX Driver
iW3617-01 28W(40V700mA), AC input (180-264)Vac,EX Driver
iW3608-00 11W(30V350mA), AC input (90-135)Vac, Bulb Lamp
iW3608-01 11W(30V350mA), AC input (180-264)Vac, Bulb Lamp
iW3608-00 8W(80V110mA), AC input (90-135)Vac, Bulb Lamp
iW3608-01 8W(80V110mA), AC input (180-264)Vac, Bulb Lamp
iW3608-00 8W(32V500mA), AC input (90-135)Vac, Bulb Lamp
CR5608-01 8W(80V110mA), AC input (180-264)Vac, Bulb Lamp
iW3606-00 4.5W(30V150mA), AC input (90-135)Vac, GU10
SSL(PWM dimming) iW3630 28W, AC input (100-240)Vac, PF>0.95, THD <10%,
SSL( 0-10V dimming) iW3630 28W(30-55V700mA), AC input (100-277)Vac, PF>0.95, THD <10%
SSL(MCU dimming, Remove control) iW3630 iW1812 28W & 12V &5V, AC input (100-240)Vac, PF>0.95, THD <10%
1.0 Features
●● Isolated AC/DC off-line LED driver●● Power factor > 0.95 for wide input voltage range
100 – 277VAC
●● Total harmonic distortion (THD) < 10%
●● Under 5% 100Hz/120Hz output current ripple
●● Resonant control to achieve high efficiency
●● LED current foldback with external NTC
●● Small size design
xx Small size input bulk capacitor
xx Small size output capacitor
xx Small transformer
●● Primary-side sensing eliminates the need for
opto-isolator feedback and simplifies design
●● Tight LED current regulation ± 5%
●● Under 0.5 second start-up time
●● Hot-plug LED module support
●● Multiple protection features:
xx LED open circuit protection
xx Single-fault protection
xx Over-current protection
xx LED short-circuit protection
xx Current sense-resistor-short-circuit protection
xx Input over-voltage and brown-out protection
2.0 Description
The iW3623 is a high-performance AC/DC off-line power
supply controller for LED luminaires. The iW3623 combines
power factor correction and LED current regulation into one
controller. It achieves PF > 0.95 and THD < 10% for 100–
277VAC input voltage range.
The iW3623 operates in quasi-resonant mode to provide
high efficiency. The device uses iWatt’s advanced primaryside
sensing technology to achieve excellent line and load
regulation without secondary-feedback circuit. In addition,
the iW3623’s pulse-by-pulse waveform analysis technology
allows accurate LED current regulation. The iW3623
maintains stability over all operating conditions without the
need for loop compensation components.
3.0 Applications
●● Non-dimmable LED lamps and luminaires
●● Optimized for up to 40W output power
iW3623 18W(40V450mA), AC input (90-264)Vac, T8
iW3623 17W(24V700mA), AC input (90-264)Vac,EX Driver
iW3623 28W(40V700mA), AC input (90-264)Vac,EX Driver
