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R1206 Series
PWM Step-up DCDC Converter for White LED

Product Specifications

The R1206 Series are CMOS-based PWM step-up DC/DC converters, which are optimized to drive white LEDs with constant current. R1206 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 different pin layout of SOT-23-6 package as R1203N and R1206N are available.

FEATURES

Input Voltage Range (Maximum Rating) 1.8 V to 5.5 V (6.5 V)
Supply Current Typ. 500 µA
Standby Current Typ. 1 µA
Feedback Voltage 0.2 V
Feedback Voltage Accuracy ±1.0% (±10mV)
Temperature-Drift Coefficient of Feedback Voltage ±150 ppm/°C
Oscillator Frequency Typ. 1.2 MHz
Maximum Duty Cycle Typ. 91%
Switch ON Resistance Typ. 1.35 Ω
UVLO Detector Threshold Typ. 1.6 V
Lx Current Limit Protection Typ. 700 mA
OVP Detector Threshold Typ. 29.5 V
Switching Control PWM
LED dimming control by external PWM signal (Frequency 200Hz to 300kHz)
Package SOT-23-6
Ceramic capacitors are recommended 0.22 µF

APPLICATION INFORMATION

R1206N071B

TYPICAL CHARACTERISTICS

7LEDs Efficiency vs. Output Current

PIN DESCRIPTION

SOT-23-62.9 mm × 2.8 mm

SOT-23-6

1 Lx
2 GND
3 VFB
4 CE
5 VOUT
6 VIN

R1206 Series for Consumer

APPLICATIONS

  • White LED Backlight for portable equipment

SELECTION GUIDE

Product Name   Package Quantity per Reel
R1206N071B-TR-FE Consumter SOT-23-6 3,000

DOCUMENT/CONTACT

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Technical Support

Package *1 Marking Reliability *2
SOT-23-6 R1206N R1206N (-FE)

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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