The PT4117 is a step-down (buck) constant current high brightness LED driver. It is designed to drive LEDs in series from a voltage source higher than the LED forward voltage. The PT4117 integrates a high-side power MOSFET and operates from an input voltage range of 6V to 30V, making it suitable for a variety of applications. It features an adjustable output current and dimming capability.

Applications

• LED Lighting
• Architectural Lighting
• Automotive Lighting
• Industrial Lighting
• Backlighting

Features

• High efficiency LED driver
• Wide input voltage range: 6V to 30V
• Adjustable output current up to 1.2A
• High-side current sense
• PWM dimming capability
• Internal soft-start
• Over-temperature protection
• Available in ESOP-8 package

Benefits

• Provides a highly efficient and reliable solution for driving high brightness LEDs
• Wide input voltage range offers flexibility in application
• Adjustable output current allows for optimization of LED performance
• PWM dimming provides precise brightness control
• Internal soft-start reduces stress on components during start-up
• Over-temperature protection enhances system reliability
• Compact package size minimizes board space requirements

Additional Details

The PT4117 utilizes a hysteretic control scheme, resulting in good regulation and fast transient response. The output current is set by an external resistor. The device's internal soft-start function limits inrush current during startup. The PT4117 also incorporates over-temperature protection, which shuts down the device if the junction temperature exceeds a safe limit.