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參數(shù)資料
| 型號(hào)： | CAT3626HV4-T2 |
| 英文描述： | 6-Channel LED Driver with I2C Interface |
| 中文描述： | 6通道LED驅(qū)動(dòng)器，帶有I2C接口 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大小： | 807K |
| 代理商： | CAT3626HV4-T2 |
CAT3626
2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
9
Doc. No. 5014 Rev. A
BLOCK DIAGRAM
Figure 2. CAT3626 Functional Block Diagram
BASIC
OPERATION
At power-up, the CAT3626 starts operating in 1x
mode where the output will be approximately equal to
the input supply voltage (less any internal voltage
losses). If the output voltage is sufficient to regulate all
LEDs currents the device remains in 1x operating
mode.
If the input voltage is insufficient or falls to a level
where the regulated currents cannot be maintained,
the device automatically switches (after a fixed time of
400μs) into 1.5x mode.
In 1.5x mode, the output is approximately equal to 1.5
times the input supply voltage (less any internal
voltage losses).
The above sequence is repeated each and every time
the chip is either powered-up or taken out of shutdown
(via EN pin), or the RegEn register is accessed by
write cycle.
LED CURRENT SETTING
The LED current setting is programmed via the I
2
C
serial interface and is stored in four
8-bit registers RegA, RegB, RegC and RegEn as
follows:
RegA stores the LED current for group A
(LEDA1 and LEDA2 channels),
RegB stores the LED current for group B
(LEDB1 and LEDB2 channels),
RegC stores the LED current for group C
(LEDC1 and LEDC2 channels),
RegEn selects the on/off state of each of the
6 LED channels.
At each write access to RegEn, the driver
automatically reconfigures to the mode (1x or 1.5x)
that provides the highest efficiency.
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| CAT3636_07 | 6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3 |
| CAT3636HV3-T2 | 6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3 |
| CAT3636 | 6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3 |
| CAT3636HV32 | 6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT3636 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:6-Channel Quad-Mode Fractional LED Driver in TQFN 3x3 |
| CAT3636_07 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3 |
| CAT3636_08 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3 |
| CAT3636HV3 | 制造商:ON Semiconductor 功能描述:IC 6-LED DRIVER QUAD HI EFFICIENCY |
| CAT3636HV32 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3 |
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