原装XC9116/XC9116B02AMR串联升压

Step-Up DC/DC Converter-Backlight LED Driver
■GENERAL DCRIPTION
The XC9116 seri is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting
applications such as cellular phon, PDAs and dial cameras. Output voltage of up to 17.5V can be derived, therefore, four
white LEDs in seri can be driven. Since an LED current can be set by an external ristor when LEDs are in-seri
connection, all white LEDs can be turned on equably. A network of two parallel legs with three in each LED can be also
driven. Luminance of the LEDs is controlled by changing the duty cycle of a PWM signal applied to the CE pin. Efficiency is
high with the low feedback reference voltage ensuring the RLED loss are minimal. In addition, an internal MOSFET with an
RDSON of 2.0 Ω is used. A low profile and all board area solution can be achieved using a chip coil and an ultra all
ceramic output capacitor (CL) of 0.22μF as a rult of the high 1.0MHz switching frequency.
The 'B' te of XC9116 has an additional fault detection circuit. If the LEDs are disconnected or damaged, excs or run away
output voltage is prevented by sping the drive of the internal MOSFET.Step-Up DC/DC Converter-Backlight LED Driver
■GENERAL DCRIPTION
The XC9116 seri is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting
applications such as cellular phon, PDAs and dial cameras. Output voltage of up to 17.5V can be derived, therefore, four
white LEDs in seri can be driven. Since an LED current can be set by an external ristor when LEDs are in-seri
connection, all white LEDs can be turned on equably. A network of two parallel legs with three in each LED can be also
driven. Luminance of the LEDs is controlled by changing the duty cycle of a PWMStep-Up DC/DC Converter-Backlight LED Driver
■GENERAL DCRIPTION
The XC9116 seri is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting
applications such as cellular phon, PDAs and dial cameras. Output voltage of up to 17.5V can be derived, therefore, four
white LEDs in seri can be driven. Since an LED current can be set by an external ristor when LEDs are in-seri
connection, all white LEDs can be turned on equably. A network of two parallel legs with three in each LED can be also
driven. Luminance of the LEDs is controlled by changing the duty cycle of a PWM signal applied to the CE pin. Efficiency is
high with the low feedback reference voltage ensuring the RLED loss are minimal. In addition, an internal MOSFET with an
RDSON of 2.0 Ω is used. A low profile and all board area solution can be achieved using a chip coil and an ultra all
ceramic output capacitor (CL) of 0.22μF as a rult of the high 1.0MHz switching frequency.
The 'B' te of XC9116 has an additional fault detection circuit. If the LEDs are disconnected or damaged, excs or run away
output voltage is prevented by sping the drive of the internal MOSFET. signal applied to the CE pin. Efficiency is
high with the low feedback reference voltage ensuring the RLED loss are minimal. In addition, an internal MOSFET with an
RDSON of 2.0 Ω is used. A low profile and all board area solution can be achieved using a chip coil and an ultra all
ceramic output capacitor (CL) of 0.22μF as a rult of the high 1.0MHz switching frequency.
The 'B' te of XC9116 has an additional fault detection circuit. If the LEDs are disconnected or damaged, excs or run away
output voltage is prevented by sping the drive of the internal MOSFET.