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SM8132AW データシート(PDF) 1 Page - Nippon Precision Circuits Inc

部品番号 SM8132AW
部品情報  White LED Driver IC
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メーカー  NPC [Nippon Precision Circuits Inc]
ホームページ  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM8132AW データシート(HTML) 1 Page - Nippon Precision Circuits Inc

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SM8132A
NIPPON PRECISION CIRCUITS INC.—1
White LED Driver IC
OVERVIEW
The SM8132A is a charge pump DC/DC converter that switches between
×1 and ×1.5 automatically. The
SM8132A switches between
×1 and ×1.5 according to detected LED drive current, so that the battery life can
be prolonged to the fullest extent. Since the connected LED are all detected for the switching, the SM8132A
can respond to the variation of LED forward voltage. 4-channel of LED drive current control circuit is built-in,
the SM8132A can control 1 to 4 lights of white LED, which are connected in parallel. The LED drive current
per channel is set up by external resistor. Besides, the input signal controlling of EN pin allows ON/OFF and
dimming.
FEATURES
I
Battery life extension by automatic charge pump
switch between
×1 and ×1.5 according to the
detection of the LED drive current
I
Controlling 1 to 4 lights of white LED connected
in parallel
I
Set up LED drive current value by external resistor
(5k
Ω:5mA/ch, 15kΩ:15mA/ch, 20kΩ:20mA/ch)
I
1-wire input controlling
I
ON/OFF and brightness control by input signal
controlling of EN pin
I
Soft start circuit built-in
I
Thermal shut down circuit built-in
I
Supply voltage range
• No-load current (IOUT = 0mA): 2.7 to 4.6V
• Load current (IOUT = 80mA): 3.3 to 4.6V
I
Maximum output voltage: 4.2V (typ)
I
Maximum output current: 80mA (typ)
I
Quiescent current
• Not-switching (
×1 mode): 0.3mA (typ)
• Switching (
×1.5 mode): 1.0mA (typ)
I
Standby current (Power save mode): 0.01
µA (typ)
I
Operating frequency (
×1.5 mode): 750kHz (typ)
I
LED drive current matching (RSET = 20k
Ω):
± 3%
I
Package: 16-pin QFN
WL-CSP (under development)
APPLICATIONS
I
Cellular phone
I
PDA
I
Portable games
I
Handy terminal
I
Digital still camera
I
Digital video camera
I
LCD back light
I
White LED driving
ORDERING INFORMATION
Device
Package
SM8132AB
16-pin QFN
SM8132AW
WL-CSP


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