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TE CH
Preliminary T6316A/B
Low-Dropout, Constant-Current White LED Bias Supply
FEATURES
• Up to 400mA LED Bias Cur...
tm
TE CH
Preliminary T6316A/B
Low-Dropout, Constant-Current White LED Bias Supply
FEATURES
Up to 400mA LED Bias Current 3% LED Current Matching Simple LED Brightness Control www.DataSheet4U.com Low 0.05uA Shutdown Current 2.7V to 5V Supply
Voltage Range SOP-8 Package and Lead-free VSET Resistor Option : T6316A : External Resistor T6316B : 20, 85, 100, 125, 150, 175, 200, 250, 300 and 350mA Output Current Option by Internal Resistor Build in Thermat Protect 160 °C
GENERAL DESCRIPTION
The T6316A/B low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. The T6316A uses a single resistor to set the bias current for four LEDs, which are matched to 3%. The T6316B build in internal resistor to set the bias current for four LED. The T6316A/B 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 T6316A/B is available in SOP-8 package and lead-free.
Applications
Portable Communication Devices Handheld Electronics LED/Display Back Light Driver Lightings
PART NUMBER EXAMPLES
PART NO. T6316A-D T6316A-DG T6316B-20D T6316B-20DG T6316B-75D T6316B-75DG
PACKAGE
SOP-8 SOP-8 lead-free SOP-8 SOP-8 lead-free SOP-8 SOP-8 lead-free
Vset Output Current resistor External 20mA 20mA 75mA 75mA E...