R1207 Series
PWM Step-up DC/DC Converter for White LED/PMOLED and General Use
-
Description
The R1207 Series are CMOS-based PWM step-up DC/DC converters, which are optimized to drive white LEDs and PMOLED with constant current. There are two types. The A version is optimized for the general use or the drive of PMOLED, and the B/C version is optimized for the serial drive of white LED with constant current. The R1207 includes a diode, an under-voltage lockout circuit (UVLO), a soft-start circuit, and an over-voltage protection circuit (OVP), a thermal shutdown circuit. By simply using an inductor, resistors, and capacitors as external components, white LEDs can be driven with high efficiency. The B/C version can set the LED current with feedback resistor (R1). The brightness of the LEDs and the soft-start time can be adjusted by applying a PWM signal (200Hz to 300kHz) to the CE pin. Two different pin layout of TSOT-23-6 package as R1205N and R1207N are available.
-
Spec
Consumer Input Voltage Range 1.8 V to 5.5 V (6.5 V) Operating Temperature Range -40°C to 85°C (125°C) Supply Current Typ. 800 µA Standby Current Typ. 1 µA Output Voltage Range Externally Adjustable: Max. 24.2 V Feedback Voltage 1.0 V (R1207N8xxA)
0.2 V (R1207N8xxB)
0.4 V (R1207N8xxC)Feedback Voltage Accuracy ±15 mV (R1207N8xxA)
±10 mV (R1207N8xxB/C)Driver ON-resistance Typ. 1.35 Ω Oscillator Frequency Typ. 1.2 MHz Maximum Duty Cycle Typ. 91% Package TSOT-23-6 Protections / Functions
TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust -
Technical
Documents-
R1207N8xxA Typical Application
-
R1207N8xxB/C Typical Application
-
Efficiency vs. Output Current: R1207N823A VOUT=10V (10 µH)
-
Efficiency vs. Output Current: R1207N823B/C 6LEDs (10 µH)
-
Related Links
-
-
Quality &
Packages- Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
-
Sample / Buy
-
Buy Online
-
Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
-
Functional Description
TSD | Thermal Shutdown Function |
---|---|
ILX | LX Current Limit Function |
OCP | Overcurrent Protection |
OVP | Overvoltage Protection |
UVLO | Undervoltage Lockout Protection |
OVLO | Overvoltage Lockout Protection |
Reverse | Reverse Current Protection Circuit |
Shutdown | Shutdown Function |
Soft Start | Soft Start Function |
SSCG | Spread Spectrum Clock Generator Function |
PGOOD | Power Good Output |
Auto Discharge | Auto Discharge Function |
Anti-ringing | Anti-ringing Switch Function |
Sequencing | Start-up Sequencing Control |
Max Duty | Maximum Duty Cycle |
Ext. Phase | Externally Adjustable Phase Compensation |
LED Adjust | LED High-speed Dimming Control |