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參數(shù)資料
| 型號： | LC410591 |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, QCC16 |
| 封裝： | 4 X 4 MM, VQFN-16 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 352K |
| 代理商： | LC410591 |
1
LC410591
Charge Pump White LED Supply
General Description
The LC410591 is a White LED Supply that provides
four regulated current sources with a fractional charge
pump DC-DC converter. It accepts an input voltage
range from 2.7V to 5.5V and maintains a constant
current. An external sense resistor determines 100%
full scale LED current.
The LC410591 delivers up to 105mA of load current to
drive one, two, three, or four White LEDs. When it
drives four LEDs, maximum 26mA of each LED is
available. When it drives three LEDs, maximum 35mA
of each LED is available. It operates with 600kHz
fixed-frequency switching without inductors, therefore
the EMI noise is very limited.
By pulsing the BRGT input, the LED brightness can be
controlled in multiple steps down to 5%.
Once the
desired brightness is set, LC410591 maintains the
brightness as long as the BRGT input keeps high. If an
BRGT input is kept low for more than 2ms, it enters
shutdown mode. The LC410591 is available in a FLGA
(WL-CSP), VQFN packages.
Typical Application Circuit
Features
Low noise, high efficiency CMOS charge pump
Built-in constant current circuit
2.7V to 5.5V input voltage
Drives one, two, three or four white LEDs with
maximum total current 105mA
Self-changing of charge pump mode (pass mode
and 1.5 boost mode)
Typical +-1.5% current matching of any two LED
outputs
Soft start limits inrush current
Charge pump frequency 600kHz
5%
to
100%
Brightness
control
through
single-wire serial input
Maximum 1uA shutdown current
Applications
White LED display backlights
White LED keypad backlights
1-Cell
Li-Ion
battery-operated
equipment
including PDAs, hand-held PCs, cellular phones
Flat panel displays
2004.09.07
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LC410591FN | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:CMOS IC Power Supply IC with Built-in White LED Charge Pump |
| LC4105V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Level Shifter |
| LC4115 | 制造商:AURIS 制造商全稱:AURIS 功能描述:Quartz SMD |
| LC4120 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:LCD Power Supply Switching IC |
| LC4120NV | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:LCD Power Supply Switching IC |
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