R1200 Series
PWM Step-up DC/DC Converter for PMOLED and General Use with Shutdown Function
Description
The R1200 Series are CMOS-based PWM step-up DC/DC converters, which are optimized to drive PMOLED or white LEDs with constant current. The R1200 includes an under-voltage lockout circuit (UVLO), a soft-start circuit, and an over-voltage protection circuit (OVP). By simply using an inductor, divider resistors, and capacitors as external components, PMOLEDs and white LEDs can be driven with high efficiency. At the standby mode, the internal NPN transistor can separate the output from the input. (Shutdown function) By this shutdown function, the LED current can be completely shutdown, and output voltage for PMOLED can be completely cut off, therefore, the R1200 does not have bad impact on the life expectancy of PMOLED. The version with auto-discharge function is available.
Spec
| Standard | |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V (6.5 V) |
| Operating Temperature Range | -40°C to 85°C (125°C) |
| Supply Current | Typ. 500 µA |
| Standby Current | Typ. 0 µA |
| Output Voltage Range | Max. 20 V (0.1 V step) |
| Feedback Voltage | 1.0 V (Externally adjustable) |
| Feedback Voltage Accuracy | ±1.5% |
| Feedback Voltage Temperature Coefficient | ±150 ppm/°C |
| Driver ON-resistance | Typ. 1.35 Ω |
| Oscillator Frequency | Typ. 1200 kHz |
| Maximum Duty Cycle | Typ. 91% |
| Package | DFN1616-6, SOT-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 |
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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 |
Technical Documents
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Typical Application
* R1, R2 : For setting output voltage, R3 : 2kΩ, C3 : 220pF
By simply using an inductor, divider resistors and capacitors as external components, a high-efficiency step-up DC/DC converter can be easily configured. -
R1200 Efficiency vs. Output Current
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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.
FAQ
Buy / Contact
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Purchase, Request for samples and documentsSales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
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Available from 1 piece!Our electronic device products are available through our authorized online distributors.
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Technical Support