RICOH R1218x Series PWM Step-up DC/DC Converter for White LED handbook

Update: 28 September, 2023

The R1218x Series are CMOS-based PWM step-up DC/DC converters, which are optimized to drive white LEDs with constant current. R1218x includes an under-voltage lockout circuit (UVLO), over-voltage protection circuit (OVP). By simply using an inductor, (a diode), a resistor, and a capacitor as external components, white LEDs can be driven with constant current efficiently. R1218xxx1A for 2 to 4 lights contains an internal diode while R1218xxx2A for 5 to 7 lights requires an external diode. The LED current can be determined by the value of current setting resistor. The brightness of the LEDs can be adjusted by applying a PWM signal to the CE or VFB pin.

Brand: RICOH

File format: PDF

Size: 175 KB

MD5 Checksum: 0A44387EC67C6AFC4219972336978A67

Publication date: 09 July, 2012

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PDF Link: RICOH R1218x Series PWM Step-up DC/DC Converter for White LED handbook PDF

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