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YB1510

  

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YB1517 [Step-up DC-DC Converter & White LED Driver ]

other parts : YB1517ST  YB1517ST25 

YOBON
YOBON TECHNOLOGIES,INC.

Description
The YB1517 is a Current-mode PWM step-up DC-DC converter. It can drive up to 18V in 20mA output current conditions while Vin at 3.0V and 20V at 3.5Vin. The 900 KHz switching frequency allows it to work with tiny external components, therefore minimize the footprint and cost in space consideration products.

Features
■ 900KHz Current-mode PWM Converter
■ Built-in Internal Switch
■ Adjustable Output Voltage up to 20V
■ 2.7V to 16V Input Range
■ <1uA Shutdown Current
■ Internal Soft Start
■ Drives up to 6 White LEDs
■ Tiny Inductor and Capacitors Allowed
■ Over Voltage Protection 30V
■ Small 5-Lead SOT-23 Package
■ 220mV Low Reference Voltage
■ Green package (RoHS) available

Applications
■ LCD Display Module
■ White LED Backlighting
■ PDAs, GPS Terminals
■ Digital Cameras
■ Cellular Phone
■ Electronic Books
■ Portable Applications

 

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YB1510 [Step-up DC-DC Converter, White LED Driver ] YOBON
YOBON TECHNOLOGIES,INC.

Description
The YB1510 is a step-up DC-DC converter; operates as current source to drive up to 7 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. The YB1510 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 YB1510 can drive up to 7 white LEDs from a single Li-Ion battery. 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.
YB1510 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.

Features
■ Built-in internal switch
■ Adjustable output voltage up to 35V
■ 2.7V to 16V input range
■ <1uA shutdown current
■ High efficiency
■ Drives up to 7 white LEDs
■ 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

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YB1519 [High-Power White LED Driver ] YOBON
YOBON TECHNOLOGIES,INC.

Description
The YB1519 is a high-power boost converter. An adjustable current limit, wide range of input voltage, and up to 40V of switch voltage are designed to drive white LEDs back-lighting for large LCD panel. It can drive up to 10 LEDs in series or 18 LEDs in parallel/series configuration.
The wide application VIN range makes YB1519 suitable for many types of battery applications such as Li-ions, Alkaline, or Sealed Lead Acid batteries. The adjustable inductor current optimizes the performance for different output drive capability by an external resistor.
The LED current is set by a resistor connected to FB pin. The On/Of duty with clock frequency from 1K to 100KHz at EN pin can control the LED brightness

Features
■ 2V to 16V Input Voltage
■ 40V Maximum Output Voltage
■ Drive up to 18 White LEDs
■ Adjustable Inductor Current
■ 1μs Constant Off-time PFM Control
■ 1KHz to 100KHz PWM Dimming Control

Applications
■ High Power WLED Backlight Solution
■ LCD Monitor
■ LCD TV
■ Car TV, Portable DVD
■ GPS navigation system
■ Handheld Game

 

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YB1518 [Step-Up DC-DC Converter ] YOBON
YOBON TECHNOLOGIES,INC.
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