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參數(shù)資料
| 型號(hào)： | CAT3643HL1-T2 |
| 英文描述： | 3-Channel Ultra High Efficiency Quad-Mode TM LED Driver |
| 中文描述： | 3通道超高效率的Quad - Mode商標(biāo)LED驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 10/17頁(yè) |
| 文件大?。?/td> | 321K |
| 代理商： | CAT3643HL1-T2 |
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CAT3643
Doc. No. 5022 Rev. B
10
2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
BLOCK DIAGRAM
Figure 2. CAT3643 Functional Block Diagram
BASIC OPERATION
At power-up, the CAT3643 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 LED 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 into 1.33x mode
(after a fixed delay time of about 400
μ
s). In 1.33x
mode, the output voltage is approximately equal to
1.33 times the input supply voltage (less any internal
voltage losses).
The above sequence repeats in the 1.33x and 1.5x
mode until the driver enters the 2x mode. In 1.5x mode,
the output voltage is approximately equal to 1.5 times
the input supply voltage. While in 2x mode, the output is
approximately equal to 2 times the input supply voltage.
If the device detects a sufficient input voltage is present
to drive all LED currents in 1x mode, it will change
automatically back to 1x mode. This only applies for
changing back to the 1x mode. The difference between
the input voltage when exiting 1x mode and returning to
1x mode is called the 1x mode transition hysteresis
(V
HYS
) and is about 500mV.
Mode Control
1, 1.3MHz
Oscillator
1x mode (LDO)
1.33x, 1.5x, 2x Charge Pump
V
IN
C
1-
C
2-
C
1+
C
2+
V
OUT
GND
LED1
LED2
LED3
LED Channel
Current Regulators
Current
Setting DAC
Serial
Interface
Registers
Referece
Voltage
EN/DIM
RSET
100k
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| CAT3644 | 4-Channel Ultra High Efficiency Quad-Mode TM LED Driver |
| CAT3644HV3-T2 | 4-Channel Ultra High Efficiency Quad-Mode TM LED Driver |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT3643HV2-GT2 | 功能描述:LED照明驅(qū)動(dòng)器 LED Driver,Quad mode,3 ch 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 |
| CAT3643HV2-T2 | 功能描述:LED照明驅(qū)動(dòng)器 LED Driver,Quad mode,3 ch 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 |
| CAT3643HV3 | 制造商:ON Semiconductor 功能描述:IC 3-LED DRIVER QUAD HI EFFICIENCY |
| CAT3643HV3-GT2 | 功能描述:LED照明驅(qū)動(dòng)器 LED Driver,Quad mode,3 ch 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 |
| CAT3643HV3-T2 | 功能描述:LED照明驅(qū)動(dòng)器 3-Channel Quad-Mode 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 |
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