STLD40DPUR Integrated Circuits (ICs)

Voltage - Output:	37V
Base Part Number:	STLD40
Supplier Device Package:	8-QFN-EP (3x3)
Package / Case:	8-QFN
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Backlight
Dimming:	PWM
Frequency:	--
Current - Output / Channel:	20mA
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	3V
Number of Outputs:	1
Internal Switch(s):	Yes
Topology:	Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

STLD40DPUR is a precise Precision Multiple Control (PMIC) LED driver IC that incorporates two LED drivers in one IC. It is an integrated LED linear/constant current driver with integrated dimming control, ultra-precise current control, and programmable pulse frequency modulation (PFM) for low power dissipation. The STLD40DPUR provides smooth and reliable LED lighting solutions for general lighting applications such as desk lamps and track lighting.

Application Field

The STLD40DPUR’s precise current control and programmability make it well suited for a wide range of professional and home lighting applications. It is most suitable for use in medium- to high-power lighting systems, such as desk lamps, track lighting, and general lighting systems. The STLD40DPUR is designed to drive single-channel or dual-channel LED strings, with either constant current or pulse frequency modulation (PFM). The device has a wide input voltage range, allowing it to be used in both low- and high-voltage systems.

Features

The STLD40DPUR has several features that make it a versatile and efficient LED driver. First, it has integrated high-speed dimming control. This allows the system designer to control the brightness of the LEDs quickly and accurately. The device also has a programmable PFM feature, which allows it to reduce power dissipation when used in low-power applications. The switching frequency is also selectable, allowing for different modes for different applications. Finally, the device has an adjustable linear or logarithmic dimming curve. This makes it easy to adjust the dimming curve to match the application.

Working Principle

The STLD40DPUR’s working principle is based on pulse frequency modulation (PFM). When PFM is used, the switching frequency is adjustable and the duty cycle fluctuates to maintain the required LED current. The device also uses a linear or logarithmic dimming curve to adjust LED brightness. Its programmable features provide a wide range of dimming options.

Conclusion

Overall, the STLD40DPUR is a well-rounded PMIC LED driver IC that is suitable for a wide range of lighting applications. Its precise control, wide input voltage range, and integrated dimming control make it an ideal choice for lighting systems that require high accuracy and reliability. Its programmable PFM feature reduces power dissipation, allowing it to be used in low- and high-power applications.

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