A8169-025
Overview
- current step-up DC/DC converter ideal for driving LEDs
- used in backlighting applications on cellular phones, PDAs and digital cameras etc. Output voltage of up to 23V
- can be derived, and from a 3.2V input six white LED’s can
- be driven in series or alternatively, using a 2.5V input, a
- network of two parallel legs with three in each may be driven. 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 0.8Ω is used. Allow
- profile and small board area solution can be achieved
- using a chip coil and an ultra small ceramic output
- capacitor (CL) of 0.22uF. Input voltage range: 2.5V~6V Output voltage range: up to 23V externally set-up reference voltage 0.25V Oscillation frequency: 1.0MHz On resistance: 0.8Ω Efficiency: 88%(When driving 3 white LEDs in series VIN=3.6V ILED=20mA) Control: PWM control Stand-by Current: ISTB=1.0uA Load capacitor: 0.22uF,ceramic Lx limit Current:1.0A Available in SOT-26 package The A8169-025 is available in SOT-26 Package.
