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PDF T6313A Data sheet ( Hoja de datos )
| Número de pieza | T6313A | |
| Descripción | High Efficiency WhiteLED Charge Pump | |
| Fabricantes | Taiwan Memory Technology | |
| Logotipo |  |
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tm TE
CH
FEATURES
• 4 Current Source Outputs
• 20mA Full Scale Current for each LED
www.DataSheet•4UP.coowmer efficency up to 93%
• 32 levels for brightness
• 2 wires interface
• Low Noise Constant Frequency Operation
• High Accuracy Brightness Matching
• White LED Backlighting
• 0.5% LED current matching
• Automatic Soft-Start
• No External Inductors, Schottky, or Zener
Diode and Resistor Required
• 500KHz Switching Frequency
(1MHz optional)
• 2.7V to 5.5V supply voltage
• Shutdown current is less 1uA
• Temperature Range -40 to 85°C
• 16-Pin QFN
Applications
• Cellular Phones
• Portable Communication Devices
• Handheld devices
• Digital Cameras
• PDAs
• LED/Display Back Light Driver
• LEDs for Camera Flash
PART NUMBER EXAMPLES
PART NO. PACKAGE Marking
T6313A-AF QFN 4mm X 4mm 6313
T6313A-BF QFN 3mm X 3mm 6313
Preliminary T6313A
Low Noise, High Efficiency
WhiteLED Charge Pump
GRNERAL DESCRIPTION
The T6313A is a charge pump DC/DC
converter driving a constant current up to 20mA
for each LED of total four LEDs. It is a high
efficiency device that is up to 93%, and it would
be a suitable driving device for LED back light
application. The T6313A operates in a 1.5x
charge pump mode based on input voltage from
2.7v to 5.5v. Operation frequency is at fixed
high frequencies either 500KHz or 1MHz
typically. It can drive 4 white LEDs connected
in parallel and provides tightly matched
regulated current to achieve uniformity of
brightness in LCD backlighting applications.
The T6313A uses two input pins to enable,
disable, and set the LED drive current for one of
32 levels of brightness. Also has a built-in soft-
start circuitry to prevent excessive inrush
current during start-up. A very low shutdown
current feature and a low quiescent current will
consume very little power and allow the device
to operate in a very high efficiency. The
T6313A is available in 16-pin QFN packages.
TM Technology Inc. reserves the right
P. 1
to change products or specifications without notice.
Publication Date: JAN. 2006
Revision: C
1 page  
tm TE
CH
Preliminary T6313A
Typical Operating Characteristics
(VIN=+3.5V, CIN= COUT=C1=C2=1uF, TA=+25 ºC, unless otherwise noted.)
TBD
www.DataSheet4U.com
TM Technology Inc. reserves the right
P. 5
to change products or specifications without notice.
Publication Date: JAN. 2006
Revision:C
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet T6313A.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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