natlinear LN5121
The LN5121 Series is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting applications on cellular phones, PDAs and digital cameras etc.| Part No. | LN5121 |
|---|---|
| Datasheet | LN5121 Download |
| Manufacturer | natlinear |
| Description | Step-up DC/DC Converter - Backlight Driver |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Output voltage of up to 15V can be derived, and from a 2.5V input three white Led’s cab be driven in series. Luminance of the LED’s is controlled by changing the duty cycle of a PWM signal applied to the CE pin. In addition, an internal MOSFET with an RDS-on of 2Ω is used. Allow profile and small board are solutions can be achieved by using a chip coil and an ultra small ceramic output capacitor (CL) of 0.22uF.●
FEATURES
● Input voltage range : 2.5V—6V● Output voltage range : up to 15V externally set-up reference voltage 0.2V
● Oscillation frequency : 1.0MHZ±20%
● On resistance : 2.0Ω
● Efficiency : 88%(When driving 3 white LEDs in series VIN=3.6V ILED=20mA)
● Control : PWM control
● Stand-by Curren
