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PDF AP3036B Data sheet ( Hoja de datos )
| Número de pieza | AP3036B | |
| Descripción | WHITE LED STEP-UP CONVERTER | |
| Fabricantes | Diodes | |
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A Product Line of
Diodes Incorporated
AP3036B
WHITE LED STEP-UP CONVERTER
Description
Pin Assignments
The AP3036B is an inductor-based DC/DC converter designed to
drive up to eight white LEDs in series for backlight. Only one
feedback resistor is needed to control the LED current and obtain
required brightness.
A constant frequency 1.0MHz PWM control scheme is employed in
this IC, which means tiny external components can be used.
Specifically, 1mm tall inductor and 0.22µF output capacitor for a
typical application is sufficient. Additionally, the Schottky diode in
boost circuit is integrated on this chip. The AP3036B also provides a
disable pin to ease its use for different systems.
The output over-voltage protection is implemented in AP3036B. When
any LED is broken or in other abnormal conditions, the output voltage
will be clamped.
The AP3036B is available in standard SOT26 package.
(Top View)
Pin 1 Mark
CTRL 1
VOUT 2
VIN 3
6 FB
5 GND
4 SW
SOT26
Applications
Features
Cellular Phones
Digital Cameras
LCD Modules
GPS Receivers
PDAs, Handheld Computers
Inherently Uniform LED Current
High Efficiency up to 84%
No Need for External Schottky Diode
Output Over-voltage Protection (OVP)
Fixed 1.0MHz Switching Frequency
Uses Tiny 1mm Tall Inductor
Requires Only 0.22µF Output Capacitor
High Frequency Dimming Control
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit (Note 4)
VIN3V
L 22
Control
Signal
VIN SW VOUT
AP3036B
CTRL
FB
CIN GND
1F 10
C OUT
0.22F
Note 4: C: X5R or X7R type dielectric, L: SUMIDA CDRH5D28R-220NC or equivalent. And, this circuit can work in full temperature.
AP3036B
Document number: DS37004 Rev. 1 - 2
1 of 11
www.diodes.com
March 2014
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
AP3036B
Performance Characteristics (The WLED forward voltage (VF) is 3.45V at IF = 20mA, unless otherwise noted.)
Efficiency vs. LED’s Number
90
88 V =3.6V
IN
86
I =20mA
OUT
84
82
80
78
76
74
72
2345678
LED Numbers
Schottky Forward Voltage vs.
Schottky Forward Current
1600
1200
800
400
0
0
100 200 300 400
Schottky Forward Current (mA)
500
Shutdown Current vs. Input Voltage
100
90 V =0V
CTRL
80
70
60
50
40
30
0 2 4 6 8 10 12 14 16 18 20
Input Voltage (V)
Quiescent Current vs. Input Voltage
3.8
V =1.0V
3.6 FB
3.4
3.2
3.0
2.8
0
4 8 12 16
Input Voltage (V)
20
Feedback Voltage vs. Temperature
Current Limit vs. Temperature
300
250
200
150
100
-40
V =3.6V, 5 LEDs
IN
0 40 80
Temperature (OC)
120 160
600 V =3.6V
IN
500
400
300
-40
0 40 80
Temperature (OC)
120 160
AP3036B
Document number: DS37004 Rev. 1 - 2
5 of 11
www.diodes.com
March 2014
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
AP3036B
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DºCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. 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.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2014, Diodes Incorporated
www.diodes.com
AP3036B
Document number: DS37004 Rev. 1 - 2
11 of 11
www.diodes.com
March 2014
© Diodes Incorporated
11 Page | ||
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| PDF Descargar | [ Datasheet AP3036B.PDF ] | |
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