R1204x Series PWM/VFM step-up DC/DC converters are optimized to drive white LEDs and OLED with constant current
The R1204x Series are CMOS-based PWM/VFM step-up DC/DC converters optimized to drive white LEDs and OLEDs. The series includes two types: A/D versions for general use or PMOLED drives, and B/C/E/F versions optimized for serial white LED driving with constant current. Key features include an under-voltage lockout circuit (UVLO), a soft-start circuit, over-voltage protection (OVP), and thermal shutdown.
| Input Voltage Range | 3V to 5.5V |
|---|---|
| Feedback Voltage (A/D Version) | 0.2V |
| Feedback Voltage (B/C/E/F Version) | 1.0V |
| Thermal Shutdown Temperature | 150°C |
| Oscillator Frequency (A/B/C Version) | 1MHz |
| Oscillator Frequency (D/E/F Version) | 750kHz |
The A/D versions are optimized for general use or PMOLED drives, while B/C/E/F versions are optimized for serial white LED driving.
The PWM signal frequency can be set between 200Hz to 300kHz.
The R1204x Series is available in DFN(PLP)1820-6 and TSOT-23-6 packages.