The HV9910 is a monolithic integrated circuit specifically designed for use in high-efficiency LED driver applications. Manufactured by Supertex, Inc., this versatile IC provides a cost-effective solution for driving LEDs with constant current, ensuring consistent brightness and long lifespan.

Applications

• LED Lighting
• Backlighting for LCD Displays
• General Purpose Constant Current Source
• Automotive Lighting
• Signage

Features

• Constant Current Control: Maintains a stable LED current, preventing damage and ensuring consistent brightness.
• Wide Input Voltage Range: Operates efficiently over a broad range of input voltages.
• High Efficiency: Minimizes power loss, reducing heat generation and improving overall system efficiency.
• PWM Dimming: Supports Pulse Width Modulation (PWM) dimming for precise brightness control.
• Internal Overvoltage Protection: Protects the LED driver from voltage surges.
• Open LED Protection: Detects and protects against open LED conditions.
• Hysteric Control: Improves stability and reduces noise.

Benefits

• Consistent LED Brightness: Provides stable and uniform light output, crucial for applications requiring visual consistency.
• Extended LED Lifespan: Prevents overcurrent and overvoltage, prolonging the operational life of the LEDs.
• Energy Efficient: Reduces power consumption, lowering operating costs.
• Precise Brightness Control: Enables smooth and accurate dimming for various lighting requirements.
• Robust Protection: Ensures reliable operation in harsh environments and prevents damage from electrical anomalies.
• Simplified Design: Reduces the number of external components needed, simplifying circuit design and lowering manufacturing costs.

Additional Details

The HV9910 typically utilizes a hysteretic control method, offering excellent stability and fast transient response. It supports both buck and boost configurations, providing flexibility in circuit design. The device operates with a switching frequency that can be adjusted through external components, allowing optimization for different applications. The HV9910 includes built-in protection features such as overvoltage protection (OVP) and open LED protection, enhancing the reliability of the LED lighting system. Supertex provides comprehensive datasheets and application notes that provide detailed guidance on selecting external components and optimizing the performance of the HV9910 in specific applications. The device is available in a variety of packages to suit different mounting requirements.