R1206N Series
PWM Step-up DC/DC Converter for White LED
 |
R1206N Series are CMOS-based PWM step-up DC/DC converters, which are optimized to drive white LEDs with constant current.
R1206N includes an under-voltage lockout circuit (UVLO), and over-voltage protection circuit (OVP). By simply using an inductor, a resistor, capacitors and a diode as external components, 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 (200Hz to 300kHz) to the CE pin. Two diffierent pin layout of SOT-23-6 package as R1203N and R1206N are available.
| Supply Current (IDD) |
Typ. 500µA (No switching) |
| Standby Current (Istandby) |
Max. 5µA (CE="L") |
| Input Voltage Range (VIN) |
1.8V to 5.5V Absolute maximum rating: 6.5V) |
| Feedback Voltage (VFB) |
0.2V |
| Feedback Voltage Accuracy |
± 10mV |
| Oscillator Frequency (fosc) |
1.2MHz |
| Oscillator Maximum Duty Cycle (Maxduty) | Min. 86%, Typ. 91% |
| UVLO Detect Voltage (VUVLO) |
Typ. 1.6V |
| Coil-current Limit Circuit |
Current limit Typ. 700mA |
| Over Voltage Protection Circuit (OVP) |
29.5V |
| LED High-speed Dimming Control |
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| Packages | SOT-23-6 |
- ・White LED driver for hand-held equipment
| Data Sheet | Flyer | Design Guide |
|---|---|---|
| R1206N Series | R1203x / R1206N Series | to be prepared |
| Package Info. | Mark Info. | Quality Assurance Data |
|---|---|---|
| SOT-23-6 | to be prepared | Reliability |
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