The OB3380CPA is a highly integrated and high-performance LED backlight driver manufactured by On-Bright Electronics. It is designed for LCD backlighting applications and provides efficient and reliable power delivery to LED strings.

Applications

• LCD TV backlights
• LCD monitor backlights
• Notebook computer displays
• General LED lighting applications

Features

• High efficiency DC-DC conversion
• Integrated PWM dimming control
• Over-voltage protection (OVP)
• Over-current protection (OCP)
• Short-circuit protection (SCP)
• Under-voltage lockout (UVLO)
• Open LED protection
• Soft-start function

Benefits

• Ensures efficient power delivery to LED backlights, reducing power consumption and heat generation.
• Enables precise brightness control through PWM dimming, allowing for optimal display performance.
• Protects the LED backlight from damage due to over-voltage, over-current, and short-circuit conditions, ensuring long-term reliability.
• Prevents damage to the IC during start-up and operation.
• Enhances system reliability by preventing operation under low voltage conditions.

Additional Details

The OB3380CPA is typically used in boost converter topologies to step up the input voltage to the required LED string voltage. It uses current-mode control for stable operation. The switching frequency is typically in the range of 100kHz to 500kHz. External components, such as inductors and capacitors, are required to complete the boost converter circuit. The device comes in a DIP package. Careful consideration of thermal management is required in high-power applications to ensure proper operation. It features comprehensive protection mechanisms to guarantee robustness in harsh environments.