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T6311A Low-Dropout, Constant-Current White LED Bias Supply
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【Part No.】 T6311A【Category】 White LED Bias Supply
【Packing】 SOP8
【MFQ】 Tmtech
【Datasheet】T6311A Datasheet
GRNERAL DESCRIPTION
The T6311A low-dropout bias supply for white LEDs is a high-performance alternative
to the simple ballast resistors used in conventional white LED designs. The T6311A
uses a single resistor to set the bias current for four LEDs, which are matched to 0.3%.
The T6311A consumes only 40uA of supply current when enabled and 0.05uA when
disabled. The T6311A advantages over ballast resistors include significantly better LED to
LED bias matching, much lower bias variation with supply voltage variation, significantly
lower dropout voltage, and in some applications, significantly improved efficiency.
The T6311A requires a 200mV dropout at a 9mA load on each output to match the LED
brightness. The T6311A is available in SOP-8 and SOT23-6 package.
FEATURES
• Low 200mV Dropout at 9mA
• Up to 150mA LED Bias Current
• 0.3% LED Current Matching
• Simple LED Brightness Control
• Low 40uA Supply Current
• Low 0.05uA Shutdown Current
• 2.5V to 5.5V Supply Voltage Range
• SOP-8 and SOT23-6 Package
• Output channel :
SOP-8 package for four channel
SOT23-6 package for three channel
Applications
• Cellular Phones
• Portable Communication Devices
• Handheld Electronics
• Digital Cameras
• PDAs
• LED/Display Back Light Driver
• LEDs for Camera Flash
Contact person:
Frances New
Phone:+86-755-81832961
Fax:+86-755-83299282
Email:sumzi@sumzi.com
MSN:sumzi-frances@msn.com
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