LT3956 (4)
The LT3956 is available from Analog Devices at Xecor. Designed for driving high-current LEDs and operating as a constant-current source and constant-voltage regulator, the LT3956 offers wide input voltage range (4.5V to 80V), output voltage up to 80V, internal 3.3A/84V switch, and true color PWM dimming with a 3000:1 ratio. Available in 36-lead QFN packages, it is ideal for high-power LED applications, battery chargers, and accurate current-limited voltage regulators. Whether used in automotive lighting, industrial systems, or telecommunications, this series ensures efficiency, flexibility, and reliable performance for demanding applications. Xecor is an authorized distributor for Analog Devices. Please view our extensive selection of the LT3956 series below.
| Part Number | Description | Package | Inventory | Add To Bom |
|---|---|---|---|---|
| LT3956EUHE#PBF | LED Driver 1700uA Supply Current 28-Pin QFN EP Tube | QFN-36 | 6,156 | |
| LT3956IUHE#PBF | 700uA Supply Current | QFN-36 | 9,361 | |
| LT3956IUHE#TRPBF | LED Driver 1700uA Supply Current 28-Pin QFN EP T/R | QFN-36 | 5,559 | |
| LT3956EUHE#TRPBF | LED Driver 1700uA Supply Current 28-Pin QFN EP T/R | QFN-36 | 6,264 |
Key Featrues
Wide Input Voltage Range (4.5V to 80V): This feature allows the LED driver to operate efficiently across a broad range of input voltages, making it versatile for various applications, including automotive, industrial, and battery-powered systems. It ensures stable performance even with fluctuating power sources, enhancing reliability and reducing the need for additional voltage regulation components.
True Color PWM Dimming (3000:1): The high-resolution PWM dimming capability enables precise control of LED brightness, maintaining color accuracy and consistency. This is particularly beneficial for applications requiring fine-tuned lighting control, such as architectural lighting, displays, and stage lighting, where color fidelity and smooth dimming are critical.
Internal 3.3A/84V Switch: The integrated high-current, high-voltage switch simplifies design by reducing the need for external components. It improves efficiency and reduces PCB footprint, making the driver suitable for compact designs and high-power LED applications, such as automotive headlights and industrial lighting.
Constant-Current and Constant-Voltage Regulation: This dual-regulation capability ensures stable operation in both current-driven (LED) and voltage-driven (battery charging) applications. It enhances flexibility, allowing the driver to be used in diverse scenarios, from LED lighting to battery charging systems, while maintaining optimal performance and protection.
Adjustable Frequency (100kHz to 1MHz): The ability to adjust the switching frequency allows designers to optimize efficiency, reduce electromagnetic interference (EMI), or minimize the size of external components. This feature is particularly useful in applications with specific performance or space constraints, such as portable devices or compact lighting fixtures.
True Color PWM Dimming (3000:1): The high-resolution PWM dimming capability enables precise control of LED brightness, maintaining color accuracy and consistency. This is particularly beneficial for applications requiring fine-tuned lighting control, such as architectural lighting, displays, and stage lighting, where color fidelity and smooth dimming are critical.
Internal 3.3A/84V Switch: The integrated high-current, high-voltage switch simplifies design by reducing the need for external components. It improves efficiency and reduces PCB footprint, making the driver suitable for compact designs and high-power LED applications, such as automotive headlights and industrial lighting.
Constant-Current and Constant-Voltage Regulation: This dual-regulation capability ensures stable operation in both current-driven (LED) and voltage-driven (battery charging) applications. It enhances flexibility, allowing the driver to be used in diverse scenarios, from LED lighting to battery charging systems, while maintaining optimal performance and protection.
Adjustable Frequency (100kHz to 1MHz): The ability to adjust the switching frequency allows designers to optimize efficiency, reduce electromagnetic interference (EMI), or minimize the size of external components. This feature is particularly useful in applications with specific performance or space constraints, such as portable devices or compact lighting fixtures.
Applications
High-Power LED Driver: The LT3956 is ideal for driving high-power LEDs in applications such as automotive lighting, architectural lighting, and industrial illumination. Its wide input voltage range (4.5V to 80V) and ability to deliver up to 80V output make it suitable for driving multiple LEDs in series or parallel configurations, ensuring consistent brightness and efficiency.
Battery Charger: The LT3956 is well-suited for battery charging applications, particularly for lithium-ion or lead-acid batteries. Its constant-current and constant-voltage regulation capabilities ensure precise charging control, while its wide input voltage range allows it to operate from various power sources, including solar panels or automotive systems.
Accurate Current-Limited Voltage Regulator: The LT3956 can be used as a highly accurate current-limited voltage regulator in power supply designs. Its ability to regulate both current and voltage makes it ideal for applications requiring stable and precise power delivery, such as laboratory equipment, medical devices, or precision instrumentation.
Industrial Power Converter: The LT3956 is perfect for industrial power conversion applications, including flyback, SEPIC, buck, and boost topologies. Its internal 3.3A/84V switch and adjustable frequency (100kHz to 1MHz) allow for efficient power conversion in demanding environments, such as factory automation, robotics, or renewable energy systems.
Battery Charger: The LT3956 is well-suited for battery charging applications, particularly for lithium-ion or lead-acid batteries. Its constant-current and constant-voltage regulation capabilities ensure precise charging control, while its wide input voltage range allows it to operate from various power sources, including solar panels or automotive systems.
Accurate Current-Limited Voltage Regulator: The LT3956 can be used as a highly accurate current-limited voltage regulator in power supply designs. Its ability to regulate both current and voltage makes it ideal for applications requiring stable and precise power delivery, such as laboratory equipment, medical devices, or precision instrumentation.
Industrial Power Converter: The LT3956 is perfect for industrial power conversion applications, including flyback, SEPIC, buck, and boost topologies. Its internal 3.3A/84V switch and adjustable frequency (100kHz to 1MHz) allow for efficient power conversion in demanding environments, such as factory automation, robotics, or renewable energy systems.
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