TE
CH
tm
Preliminary T6326A
TM Technology Inc. reserves the right
P. 1
Publication Date: FEB. 2006
to change products or specifications without notice.
Revision: A
Low-Dropout, Constant-Current
White LED with Channel Control
FEATURES
• Up to 400mA LED Bias Current
• 3% LED Current Matching
• Simple LED Brightness Control
• Low 0.05uA Shutdown Current
• 3V to 5.5V Supply Voltage Range
• MSOP-10L Package
• Output channel :
MSOP-10L package for four channel
• LED1~4 Channels ON / OFF states:
T6326A-AM with 16 channel states
T6326A-BM with 5 channel states
• Build in Thermal Protect 140
°C
Applications
• Cellular Phones
• Portable Communication Devices
• Handheld Electronics
• Digital Cameras
• PDAs
• LED/Display Back Light Driver
• LEDs for Camera Flash
PART NUMBER EXAMPLES
GRNERAL DESCRIPTION
The T6326A low-dropout bias supply for
white LEDs is a high-performance alternative
to
the
simple
ballast
resistors
used
in
conventional white LED designs. The T6326A
with internal channel on/off select function.
The T6326A uses a single resistor to set the
bias current for four LEDs, which are matched
to 3%. The T6326A 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 T6326A is available in MSOP-10L
package.
PART NO.
PACKAGE
ON states
T6326A-AM
MSOP-10L
16
T6326A-BM
MSOP-10L
5
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