ZXLD381FHTA Diodes Inc, ZXLD381FHTA Datasheet

LED Drivers SINGLE OR MULTI CELL

ZXLD381FHTA

Manufacturer Part Number
ZXLD381FHTA
Description
LED Drivers SINGLE OR MULTI CELL
Manufacturer
Diodes Inc
Datasheet

Specifications of ZXLD381FHTA

Number Of Segments
1
Operating Supply Voltage
0.9 V to 2.2 V
Maximum Supply Current
20 mA
Maximum Power Dissipation
450 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-23-3
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ZXLD381FHTA
Manufacturer:
PAM
Quantity:
12 000
Typical Application Circuit
Application
Summary
The ZXLD381 is a single cell LED driver designed for applications where step-up voltage conversion from a very low input
voltage is required. These applications mainly operate from 1.5V or 1.2V cells. The IC generates constant current pulses that
are ideal for driving single or multiple LEDs over a wide range of operating voltages.
The ZXLD381 uses a PFM control technique to drive an internal switching transistor which a low saturation resistance. This
ensures high efficiency, even for input voltages as low as 1V.
The IC can start up under full load and operates down to an input voltage of only 0.9V.
The ZXLD381 is offered in the space saving SOT23 package or in die form, offering an excellent cost vs performance solution
for single cell LED driving applications.
Features
ZXLD381
Document number: DS32188 Rev. 3 - 2
V
IN
85% Efficiency
User adjustable output current
Single cell operation (0.9V minimum)
Low saturation voltage switching transistor
SOT23-3 package
Available also in Die form
Simple Application circuit
LED flashlights and torches
LED backlights
White LED driver
GND
V
CC
V
ZXLD381
OUT
L1
www.diodes.com
1 of 9
Pin Assignments
LED
SINGLE OR MULTI CELL LED DRIVER SOLUTION
Diodes Incorporated
A Product Line of
(Top View)
SOT23-3
© Diodes Incorporated
ZXLD381
May 2010

Related parts for ZXLD381FHTA

ZXLD381FHTA Summary of contents

Page 1

... LED backlights • White LED driver Typical Application Circuit OUT GND ZXLD381 ZXLD381 Document number: DS32188 Rev SINGLE OR MULTI CELL LED DRIVER SOLUTION Pin Assignments L1 LED www.diodes.com A Product Line of Diodes Incorporated ZXLD381 SOT23-3 (Top View) May 2010 © Diodes Incorporated ...

Page 2

... OUT 3 Supply voltage, generally Alkaline, NiMH or NiCd single cell V CC ZXLD381 Document number: DS32188 Rev Diodes Incorporated VCC ZXLD381 Pulse Control Con Coff Rsense GND Fig 1. ZXLD381 Block Diagram Description www.diodes.com A Product Line of ZXLD381 L1 VOUT LED May 2010 © Diodes Incorporated ...

Page 3

... LED V = 3.5V LED www.diodes.com A Product Line of Diodes Incorporated ZXLD381 Unit °C °C Limits Units Min Typ. Max 0.9 2.2 0.8 0.9 250 320 400 100 300 40 70 120 350 kHz 0.7 1.5 2.5 May 2010 © Diodes Incorporated µ µs ...

Page 4

... ZXLD381 Document number: DS32188 Rev Product Line of Diodes Incorporated pin close to ground which forces the supply voltage OUT reaches the load LED's forward (on) OUT . This action is sensed by the pulse control circuit, which initiates the www.diodes.com ZXLD381 May 2010 © Diodes Incorporated ...

Page 5

... Efficiency vs. V Channel-1 (Upper): I 1.6 1.8 2 Channel-2 (Lower): V Operating Waveforms for L = 4.7µ www.diodes.com A Product Line of Diodes Incorporated ZXLD381 22µH 1 1.2 1.4 1.6 1.8 V (V) CC for L = 2.2µH to 47µ 100mA/cm LED @ 1V/cm OUT Timebase: 500ns/cm = 1.5V CC May 2010 © Diodes Incorporated 2 ...

Page 6

... V ( vs. V for L = 47µH OSC CC Notes 3.5V for all graphs LED ZXLD381 Document number: DS32188 Rev 1.6 1 www.diodes.com A Product Line of Diodes Incorporated ZXLD381 May 2010 © Diodes Incorporated ...

Page 7

... Application Examples Standard Operating Mode Notes 3.5V LED Low Ripple LED Current Mode Notes 3.5V ZHCS1000 (low ESR) LED ZXLD381 Document number: DS32188 Rev Product Line of Diodes Incorporated www.diodes.com ZXLD381 May 2010 © Diodes Incorporated ...

Page 8

... Ordering Information Part Number Package ZXLD381FHTA SOT23 Package Outline Dimensions leads Millimeters Dim. Min. Max. Min 1.12 A1 0.01 0.10 0.0004 b 0.30 0.50 0.012 c 0.085 0.20 0.003 D 2.80 3.04 0.110 e 0.95 NOM ZXLD381 Document number: DS32188 Rev Part Mark 381 Inches Millimeters Dim ...

Page 9

... Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. ...

Related keywords