The STI9287 is a high-efficiency step-up (boost) converter designed to drive up to seven series-connected white LEDs from a single-cell Lithium-Ion battery. Housed in a compact SOT-23-6 package, it is ideal for applications requiring efficient LED backlighting solutions.
Features
- High Efficiency: Achieves up to 90% efficiency, optimizing battery life in portable devices.
- 1.0MHz Constant Frequency Operation: Allows the use of small external components, reducing overall PCB space.
- Integrated Power MOSFET: Simplifies design and reduces external component count.
- Low Feedback Voltage: a 200mV feedback voltage, minimizing power loss and enhancing efficiency.
- Protection: Includes under-voltage lockout (UVLO), thermal shutdown, internal current limiting, and over-voltage protection to ensure reliable operation.
- Soft-Start and Dimming: Supports soft-start functionality and wide-range PWM dimming for flexible brightness control.
Applications
- Camera flash white LED drivers
- Mobile phone and smartphone LED backlighting
- PDA and digital still camera LED backlighting
- Camcorder lighting
Pin Configuration (SOT-23-6):
- LX/SW: Switch node connection to the inductor.
- GND: Ground pin.
- FB: Feedback input for output voltage regulation.
- EN: Enable pin; drive above 1.5V to turn on the device, and below 0.4V to turn it off.
- OVP: Over-voltage protection input; connect to the output at the top of the LED string.
- IN: Power supply input; should be decoupled to GND with a suitable ceramic capacitor.
Specification
| Input Voltage Range | 2.5V to 24V DC |
| Switching Frequency | 1MHz |
| Feedback Voltage | 200mV |
| Shutdown Current | <1uA |
| Package | SOT23-6 |
FAQs
About Shipping Charges and delivery time
- Standard shipping: Rs 80 /- The order gets delivered within 4-6 working days. (6-7 days in case of the battery as it travels through the surface).
- Free shipping is applicable to the purchase of Rs.999 and above. The order gets delivered within 4-6 working days. (8-10 days in case of the battery as it travels through the surface)
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