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參數資料
| 型號： | T6313A-BF |
| 廠商： | TM Technology, Inc. |
| 英文描述： | Low Noise, High Efficiency WhiteLED Charge Pump |
| 中文描述： | 低噪聲，高效率電荷泵WhiteLED |
| 文件頁數： | 1/10頁 |
| 文件大小： | 99K |
| 代理商： | T6313A-BF |
TE
CH
tm
Preliminary T6313A
TM Technology Inc. reserves the right
P. 1
to change products or specifications without notice.
Publication Date: JAN. 2006
Revision: C
Low Noise, High Efficiency
WhiteLED Charge Pump
FEATURES
4 Current Source Outputs
20mA Full Scale Current for each LED
Power 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
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.
PART NO.
PACKAGE
Marking
T6313A-AF QFN 4mm X 4mm
T6313A-BF QFN 3mm X 3mm
6313
6313
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