 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AAT3129ITP-60-T1 Datasheet(PDF) 11 Page - Advanced Analogic Technologies |
|
||||||||||||||||||||||||||||||
AAT3129ITP-60-T1 Datasheet(HTML) 11 Page - Advanced Analogic Technologies |
|
|
11 / 14 page  AAT3129 High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications 3129.2005.11.1.3 11 Color Registers R, G, and B The individual color brightness is set using the three R, G, and B registers. The data register con- tents determine the on-time for each color channel during a PWM cycle. The first level is 0, or off, and is set with a single EN/SET rising edge. This setting eliminates a given color from the spectrum. The remaining 15 levels progressively increase the brightness for a particular color by increasing that channel’s on-time. Using the red channel as an example, the resulting on-time is on-time = (R - 1) · 128µs where R is the data setting (from 1 to 16). The same applies to G and B. Intensity Register T The overall intensity level is set by the T register. Once a particular mixing of colors is set to produce the desired color, the overall intensity can be adjusted while keeping constant the ratio of colors to one another. The brightest level is set by pro- gramming the T register with 1 edge. Programming the T register with 16 edges produces the dimmest setting. The T register adjusts the overall intensity by controlling the PWM off-time. Under the dimmest setting, the off-time is the longest. The off- time that results from the data in the T register is off-time = (T - 1) · 512µs Diode Current Timing (R - 1) · 128 µs (T - 1) · 512 µs 128 µs (G - 1) · 128 µs 128 µs (B - 1) · 128 µs 128 µs I SRC I SRC Red Green Blue I SRC I SRC Mode Register M The mode register determines the method of update for the R, G, and B channels. When the mode register is set to 1, the addressed color updates immediately. When the mode register is set to 2, the colors will update when the T register is written (synchronized updating). Under immediate updating, an addressed channel will update as soon as new data has latched for it. Under synchronized updating, the channels that have been assigned new data will not update until data for the T register latches. By using synchronized updating, discrete changes in color can be achieved. Synchronized updating allows the intensity for all three colors to be updat- ed simultaneously. All three color registers can be loaded with new data prior to the update. Then, upon loading the T register, all three colors will change to their new states together. This allows a user to transition from one mixed color to another without having to traverse intermediate colors. Under immediate updating color changes can only be achieved serially, or one color at a time. |
Similar Part No. - AAT3129ITP-60-T1 |
|
Similar Description - AAT3129ITP-60-T1 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
