TPS92515QDGQRQ1 LED Drivers: Equivalence, Datasheet, and Pinout

TPS92515QDGQRQ1 LED Drivers from Texas Instruments are monolithic switching regulators with a low resistance N-Channel MOSFET integrated. The device is designed for high-brightness LED lighting applications that require efficiency, high bandwidth, PWM   and/or analog dimming, and compactness. The regulator works by controlling peak current with a consistent off-time. The procedure is straightforward: after an off-time determined by the output voltage, and on-time begins. When the inductor peak current threshold is achieved, the on-time comes to an end. During the ON and OFF periods of a shunt FET dimming cycle, the TPS92515QDGQRQ1   device can be set to maintain a consistent peak-to-peak ripple. This is great for maintaining a linear response across the whole dimming range of shunt FETs.

• AEC-Q100 Grade 1 Qualified

• Integrated 290-mΩ (typ) Internal N-Channel FET

• Input Voltage Range:

– TPS92515x: 5.5 V to 42 V – TPS92515HVx: 5.5 V to 65 V – Operation Down to 5.15 V After Start-Up

• Low Offset High-side Peak Current Comparator

• Constant Average Current, up to 2 A • Inherent Cycle-by-Cycle Current Limit

• Multiple Dimming Methods

– 10,000:1 Shunt PWM Dimming Range

– 1000:1 PWM Dimming Range

– 200:1 Analog Dimming Range

• Simple Constant Off-time Control

– No Loop Compensation

– Fast Transient Response

• Thermally Enhanced HVSSOP Package

• Integrated Thermal Protection

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Footprint

3D Models

The TPS92515QDGQRQ1 operates using a peak-current, constant OFF-time. Two states dictate

the high-side FET control. The switch turns on and stays on until the programmed peak current is reached. The peak current is controlled by monitoring the voltage across the sense resistor. When the voltage drop is higher than the programmed threshold, the peak current is reached, and the switch is turned OFF, which initiates the OFF-time period. A capacitor on the COFF pin is then charged through a resistor connected to the output. When the COFF pin voltage reaches the 1-V (typical) threshold, the OFF-time ends. The COFF pin capacitor resets and the main switch turns ON, and the next cycle begins.

Texas Instruments Incorporated (TI) is an American technology company based in Dallas, Texas, that designs and manufactures semiconductors and integrated circuits for electronic designers and manufacturers around the world. Based on sales volume, it is one of the top ten semiconductor companies in the world. Analog chips and embedded processors, which account for more than 80% of the company's revenue, are the company's main focus. TI also makes calculators, microcontrollers, and multi-core processors, as well as TI digital light processing technology and education technology. As of 2016, the company had 45,000 patents worldwide.

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