资料下载
×
LM3433,pdf datasheet (Common A
消耗积分:3 |
格式:rar |
大小:554 |
2009-09-30
微风挽雨
分享资料个
The LM3433 is an adaptive constant on-time DC/DC buck
(step-down) constant current controller (a true current
source). The LM3433 provides a constant current for illuminating
high power LEDs. The output configuration allows the
anodes of multiple LEDs to be tied directly to the ground referenced
chassis for maximum heat sink efficacy. The high
frequency capable architecture allows the use of small external
passive components and no output capacitor while maintaining
low LED ripple current. Two control inputs are used to
modulate LED brightness. An analog current control input is
provided so the LM3433 can be adjusted to compensate for
LED manufacturing variations and/or color temperature correction.
The other input is a logic level PWM control of LED
current. The PWM functions by shorting out the LED with a
parallel switch allowing high PWM dimming frequencies. High
frequency PWM dimming allows digital color temperature
control, interference blanking, field sequential illumination,
and brightness control. Additional features include thermal
shutdown, VCC under-voltage lockout, and logic level shutdown
mode. The LM3433 is available in a low profile LLP-24
package.
(step-down) constant current controller (a true current
source). The LM3433 provides a constant current for illuminating
high power LEDs. The output configuration allows the
anodes of multiple LEDs to be tied directly to the ground referenced
chassis for maximum heat sink efficacy. The high
frequency capable architecture allows the use of small external
passive components and no output capacitor while maintaining
low LED ripple current. Two control inputs are used to
modulate LED brightness. An analog current control input is
provided so the LM3433 can be adjusted to compensate for
LED manufacturing variations and/or color temperature correction.
The other input is a logic level PWM control of LED
current. The PWM functions by shorting out the LED with a
parallel switch allowing high PWM dimming frequencies. High
frequency PWM dimming allows digital color temperature
control, interference blanking, field sequential illumination,
and brightness control. Additional features include thermal
shutdown, VCC under-voltage lockout, and logic level shutdown
mode. The LM3433 is available in a low profile LLP-24
package.
声明：本文内容及配图由入驻作者撰写或者入驻合作网站授权转载。文章观点仅代表作者本人，不代表电子发烧友网立场。文章及其配图仅供工程师学习之用，如有内容侵权或者其他违规问题，请联系本站处理。 举报投诉
评论(0)
发评论
- 相关下载
- 相关文章
