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W-6137TD-GT データシート(PDF) 1 Page - Copal Electronics

部品番号 W-6137TD-GT
部品情報  CMOS Boost Converter
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メーカー  COPAL [Copal Electronics]
ホームページ  http://www.nidec-copal-electronics.com/e
Logo COPAL - Copal Electronics

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NIDEC COPAL ELECTRONICS CORP.
, 201
Rev.
1
Publication Order Number:
W-6137/
W-6137
CMOS Boost Converter -
White LED Driver
Description
The W-6137 is a DC/DC step-up converter that delivers a
regulated output current. Operation at a constant switching frequency
of 1 MHz allows the device to be used with small value external
ceramic capacitors and inductor.
The device drives a string of white LEDs connected in series and
provides the regulated current to control the LEDs with inherent
uniform brightness and matching. An external resistor R1 sets the
output current and allows up to 30 mA current to be supported over a
wide range of input supply voltages from 2.2 V to 5.5 V, making the
device ideal for battery-powered applications.
LED dimming can be done by using a DC voltage, a logic signal, or
a pulse width modulation (PWM) signal. The shutdown control pin
allows the device to be placed in power-down mode with “zero”
quiescent current.
In addition to thermal protection and overload current limiting, the
device also enters a very low power operating mode during “Open
LED” fault conditions. The device is housed in a low profile (1 mm
max height) 5 lead thin SOT23 package for space critical
applications.
Features
Drives up to 5 White LEDs from 3 V
Power Efficiency up to 87%
Low Quiescent Ground Current 0.1 mA
Adjustable Output Current (up to 30 mA)
High Frequency 1 MHz Operation
“Zero” Current Shutdown Mode
Operates Down to 2 V (from Two AA Batteries)
Soft Start Power up
Open LED Low Power Mode
Automatic Shutdown at 1.9 V (UVLO)
Thermal Shutdown Protection
Thin SOT23 5 lead (1 mm Max Height)
These Devices are Pb Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
LCD Backlighting
Cellular Phones
Handheld Devices
Digital Cameras
TSOT 23
PIN CONNECTIONS
UEYM
MARKING DIAGRAMS
Device
Package
Shipping
ORDERING INFORMATION
(Note 1)
TSOT 23
(Pb Free)
3,000/
Tape & Reel
Y = Production Year (Last Digit)
M = Production Month (1 9, A, B, C or O, N, D)
1
5
(Top View)
VIN
SHDN
SW
FB
1
1. NiPdAu Plated Finish (RoHS compliant)


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