http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




YOBON TECHNOLOGIES
YOBON TECHNOLOGIES


YB1508

Step-up DC-DC Converter


No Preview Available !

YB1508 pdf
www.DataSheet4U.com
YB1508
Step-up DC-DC Converter , White LED Driver
Description
Features
The YB1508 is a step-up DC-DC converter,
acting as current source to drive up to 8
white LEDs in series. Series connecting of
the LEDs provides identical LED currents
resulting in uniform brightness and
eliminating the need for ballast resistors.
The light intensity of these LEDs is
proportional to the current passing through
them. Additional features include output over
voltage protection to prevent device damage
due to faulty LED or open circuit caused by
abnormal conditions, and one-pin shutdown
and multiple methods of dimming control.
The YB1508 switches at a fixed frequency of
1MHz, allowing the use of tiny external
components and low input noise and ripple.
To control LED brightness, the LED current
can be pulsed by applying a PWM (pulse
width modulated) signal with a frequency
range of 100Hz to 50KHz to the CTRL pin.
The YB1508 is available in a low profile 5-lead
SOT-23 package.
Typical Application Circuit
„ 2.7V to 9V input range
„ Adjustable output voltage up to 40V
„ Built in internal switch
„ Inherently matched LED current
„ Fixed frequency of 1MHz PWM
operation
„ Open LED protection
„ Low profile 5-Lead SOT-23 package
„ High efficiency: over 80% at 3.6V
input voltage
„ Drives up to 8 white LEDs
Applications
„ LCD Display Module
„ OLED panel/sub-panel
„ White LED Backlighting
„ Digital Camera
„ Cellular Phone
„ Portable Application
YB1508 MRev1.4
Figure 1Typical Application Circuit
WWW.YOBON.COM.TW
1



No Preview Available !

YB1508 pdf
www.DataSheet4U.com
Pin Description
YB1508
Step-up DC-DC Converter , White LED Driver
Figure 2YB1508 SOT23-5
Pin Designator
Table 1 :
Pin Name
1 SW
2 GND
3 FB
4 CTRL
5 VIN
Description
Switching Pin. This is the collector of the internal NPN power switch. Connect to
inductor and diode. Minimize the metal trace area connected to this pin to reduce
EMI.
Ground Pin. Connect directly to local ground plane.
Feedback Pin. Reference voltage is 200mV. Connect LEDs and a resistor at this
pin. LED current is determined by the resistance and CTRL voltage.
Shutdown Pin and Dimming Control pin.
A. VCTRL > 1.8V generates full-scale LED current
B. VCTRL < 0.4V chip is off
C. Switching from 0.4V to 2.0V, PWM duty cycle controls the LED current
Input Supply Pin. Bypass this pin with a capacitor as close to the device as
possible.
Ordering Information
Table 2:
Order Number
High Ovp YB1508
Low Ovp YB1508P
Package Type
SOT23-5
SOT23-5
Supplied as
3000 units Tape & Reel
3000 units Tape & Reel
Package Marking
Y58
Y58P
YB1508 MRev1.4
WWW.YOBON.COM.TW
2



Part Number YB1508
Description Step-up DC-DC Converter
Maker YOBON TECHNOLOGIES - YOBON TECHNOLOGIES
Total Page 7 Pages
PDF Download
YB1508 pdf
Download PDF File
YB1508 pdf
View for Mobile




Featured Datasheets

Part Number Description Manufacturers PDF
YB1506 Step-Up DC-DC Converter YB1506
Yobon
PDF
YB1508 Step-up DC-DC Converter YB1508
YOBON TECHNOLOGIES
PDF
YB1509 High-Power White LED Driver YB1509
YOBON TECHNOLOGIES
PDF
YB1510 Step-up DC-DC Converter YB1510
YOBON TECHNOLOGIES
PDF
YB1517 Step-up DC-DC Converter & White LED Driver YB1517
YOBON TECHNOLOGIES
PDF
YB1518 Step-up DC-DC Converter White LED Driver YB1518
YOBON TECHNOLOGIES
PDF


Part Number Start With

0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

site map

webmaste! click here

contact us

Buy Components