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YB1508

Features: 2.7V to 9V input rangeAdjustable output voltage up to 40V Built in internal switch Inherently matched LED current Fixed frequency of 1MHz PWMoperationOpen LED protectionLow profile 5-Lead SOT-23 packageHigh efficiency: over 80% at 3.6Vinput voltageDrives up to 8 white LEDsApplicationLCD...

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SeekIC No. : 004549745 Detail

YB1508: Features: 2.7V to 9V input rangeAdjustable output voltage up to 40V Built in internal switch Inherently matched LED current Fixed frequency of 1MHz PWMoperationOpen LED protectionLow profile 5-Lead...

YB1508 Data Sheet

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Part Number:
YB1508
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/21

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Product Details

Description



Features:

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


Application

LCD Display Module
OLED panel/sub-panel
White LED Backlighting
Digital Camera
Cellular Phone
 Portable Application


Pinout

Connection Diagram


Specifications

SW voltage                                           40V
All other pins                                        10V
Maximum Junction Temp,Tj                   150
Lead Temperature (Soldering 10 sec)  300
Thermal Resistance                              195


Description

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.




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