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參數(shù)資料
| 型號： | LP5520TL |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | RGB Backlight LED Driver |
| 中文描述： | LED DISPLAY DRIVER, PBGA25 |
| 封裝： | 2.77 X 2.59 MM, 0.60 MM HEIGHT, SMD-25 |
| 文件頁數(shù)： | 15/34頁 |
| 文件大?。?/td> | 790K |
| 代理商： | LP5520TL |
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20186117
Pulse positions in the PWM cycle
SEQUENTIAL MODE
Completely non-overlapping timing can be obtained by using
the sequential mode as shown in the graph below. The timing
is defined with external PWM control inputs. The minimum
trigger pulse width in the PWM inputs is 1 μs. There is no
limitation on the maximum width of the pulse as long as it is
shorter than the whole sequence.
20186118
Non-overlapping external synchronized sequential mode
In sequential mode the PWM cycle is synchronized to trigger
pulses and the amount of PWM pulses per trigger can be de-
fined to 2, 3 or 4 using the
<seq_mode0>
and
<seq_mode1>
control bits. This makes possible to use se-
quence lengths of about 5 ms, 7.5 ms or 10 ms. Fast PWM
can be used in sequential mode, but the frame timing is as
with normal PWM.
The PWM timing and synchronization timing originate from
different clock sources. Some margin should be allowed for
clock tolerances. This margin shows as a dead time in the
waveform graph. Some dead time should be allowed so that
no PWM pulse will be clipped. Clipping would distort the in-
tensity balance between the LEDs. The dead time will cause
some intensity reduction, but will assure the current balance.
15
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP5520TLX | RGB Backlight LED Driver |
| LP5521 | Programmable Three Channel LED Driver |
| LP5521TM | Programmable Three Channel LED Driver |
| LP5521TMX | Programmable Three Channel LED Driver |
| LP5521YQ | Programmable Three Channel LED Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP5520TL/NOPB | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP5520TLX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:RGB Backlight LED Driver |
| LP5520TLX/NOPB | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP5521 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Programmable Three Channel LED Driver |
| LP5521TM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Programmable Three Channel LED Driver |
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