Special Contents for Automotive Applications
The reason RICOH power management IC has been chosen for more than 20 years
Special Contents for IoT Devices
Ultra-low supply current / Low noise / Low electromotive force / Battery monitoring
Special Contents for Industrial Applications
Long term supply / Flexible quantity purchase / High quality and reliability
The R1208 Series are PWM step-up DC/DC converters for white LEDs. The R1208 includes an under voltage lockout circuit (UVLO), an overvoltage protection circuit (OVP), a thermal shutdown protection circuit, and current drivers for four white LED channels. By simply using an inductor, a resistor, capacitors and a diode, white LEDs can be driven with constant current and high efficiency. The LED current can be determined by the value of current setting resistor. The brightness of the LEDs can be adjusted quickly by applying a PWM signal (200 Hz to 300 kHz) to the CE pin. A 2.7-mm x 3.0-mm square compact DFN(PLP)2730-12 package is available.
|Input Voltage Range (Maximum Rating)||2.7 V to 22 V (24 V)|
|Supply Current||Typ. 600 µA|
|Standby Current||Typ. 1.5 µA|
|Lx Current Limit||Typ. 2 A|
|Overvoltage Protection (OVP)||Typ. 23 V / 33 V / 43.5 V|
|Oscillator Frequency||Typ. 750 kHz / 450 kHz|
|Maximum Duty Cycle||95% (750 kHz) / 97% (450 kHz)|
|Nch MOSFET ON Resistance||Typ. 0.28 Ω|
|Undervoltage Lockout (UVLO)||Typ. 2.4 V|
|Thermal Shutdown||Typ. 150°C|
|LED Dimming Control||By sending a PWM signal (200 Hz to 300 kHz) to the CE pin|
R1208K Efficiency vs. Output Current
R1208x312B VLF504012MT-220M / 6LED × 4 Strings
*) The tab is substrate level (GND).
PRODUCT LONGEVITY PROGRAM
R1208 series operate PRODUCT LONGEVITY PROGRAM.
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.
The OVP threshold voltage and the oscillator frequency are user-selectable options.
|Product Name||Package||Quantity per Reel|