DC-DC Converter. YB1520 Datasheet

YB1520 Datasheet PDF, Equivalent


Part Number

YB1520

Description

High Power Step-up DC-DC Converter

Manufacture

YOBON TECHNOLOGIES

Total Page 18 Pages
PDF Download
Download YB1520 Datasheet PDF


YB1520 Datasheet
www.DataSheet4U.com
YB1520
High Power Step-up DC-DC Converter, White LED Driver
Description
Features
The YB1520 is a step-up DC-DC converter;
operates as current source to drive up to 9
white LEDs in series or 30 white LEDs in
parallel/series configuration. 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. The YB1520 switches at
a fixed frequency of 700KHz, allowing the use
of tiny, low profile inductors and capacitors to
minimize footprint and cost in space
consideration applications for cellular phone
backlighting or other hand held equipment.
The YB1520 can drive up to 9 white LEDs from
a single Li-Ion battery and drive up to 30 white
LEDs from a 5V. The wide input voltage range
from 2.7V to 16V is ideal for portable and
automotive (5V/12V) applications with higher
conversion efficiency. 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.
YB1520 has integrated Over Voltage Protection
that prevents damage to the device in case of a
high impedance output due to faulty LED or
open circuit caused by abnormal conditions.
Typical Application Circuit
„ Built-in internal switch
„ Adjustable output voltage up to 35V
„ 2.7V to 16V input range
„ <1uA shutdown current
„ High efficiency
„ Drives up to 30 white LEDs in
„ Parallel/series
„ Over voltage protection
„ Small 5-Lead SOT-23 package
Applications
„ LCD Display Module
„ White LED Backlighting
„ PDAs, GPS terminals
„ Digital Cameras
„ Cellular Phone
„ Electronic Books
„ Portable Applications
YB1520 MRev.1.2
Figure 1: Typical Application Circuit
www.yobon.com.tw
1

YB1520 Datasheet
www.DataSheet4U.com
Pin Configuration
YB1520
High Power Step-up DC-DC Converter, White LED Driver
Pin Description
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.
VCTRL > 1.8V generates full-scale LED current
VCTRL < 0.4V chip is off
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
Order Number
YB1520ST25
Supplied as
3000 units Tape & Reel
Package Marking
Y52M
YB1520 MRev.1.2
www.yobon.com.tw
2


Features Datasheet pdf www.DataSheet4U.com YB1520 High Power S tep-up DC-DC Converter, White LED Drive r Description The YB1520 is a step-up DC-DC converter; operates as current so urce to drive up to 9 white LEDs in ser ies or 30 white LEDs in parallel/series configuration. Series connecting of th e LEDs provides identical LED currents resulting in uniform brightness and eli minating the need for ballast resistors . The light intensity of these LEDs is proportional to the current passing thr ough them. The YB1520 switches at a fix ed frequency of 700KHz, allowing the us e of tiny, low profile inductors and ca pacitors to minimize footprint and cost in space consideration applications fo r cellular phone backlighting or other hand held equipment. The YB1520 can dri ve up to 9 white LEDs from a single Li- Ion battery and drive up to 30 white LE Ds from a 5V. The wide input voltage ra nge from 2.7V to 16V is ideal for porta ble and automotive (5V/12V) application s with higher conversion efficiency. To control LED brightness,.
Keywords YB1520, datasheet, pdf, YOBON TECHNOLOGIES, High, Power, Step-up, DC-DC, Converter, B1520, 1520, 520, YB152, YB15, YB1, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)