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TPS92641PWPR Datasheet(PDF) 1 Page - Texas Instruments |
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TPS92641PWPR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 10 page SDIM* GND UDIM TPS92641 DAP VIN LED+ LED- R2 R3 R1 C1 R4 R8 R7 C6 C8 R5 R6 C7 D2 Q1 Q2 Q3* LED LOAD L1 C5 C2 C4 C3 D1 R10 *TPS92641 only R9 HG SW BOOT VCC LG CS GND SDRV VIN RON UDIM VOUT VREF IADJ COMP SDIM TPS92640 TPS92641 www.ti.com SNVS902 – NOVEMBER 2012 TPS92640 / TPS92641 Synchronous Buck Controllers for Precision Dimming LED Drivers Check for Samples: TPS92640, TPS92641 1 FEATURES DESCRIPTION The TPS92640/41 are high voltage, synchronous 2 • VIN range from 7V to 85V NFET controllers for buck current regulators. Output • 2 Ω, 1Apeak MOSFET gate drivers current regulation is based on valley current-mode • Adjustable LED Current Sense voltage control with a constant on-timer. This control method eases the design of loop compensation. The • Input UVLO and output OVP TPS92640/41 includes a high-voltage start-up • Various dimming modes regulator that operates over a wide input range of 7V – 500:1 Analog Dimming to 85V. The PWM controller is designed for high speed capability including an oscillator frequency – 2500:1 Standard PWM dimming range up to 1.0 MHz. The TPS92640/41 is optimized – 20000:1 Shunt FET PWM dimming to give superior dimming performance with both • Shunt Dimming MOSFET gate driver analog and PWM dimming. Both devices include an error amplifier, precision reference, thermal shutdown • Programmable switching frequency and low power shutdown mode. Additionally, the • Precision Voltage Reference TPS92641 provides shunt FET dimming capability. • Low Power Shutdown Mode and Thermal Shutdown APPLICATIONS • LED Driver / Constant Current Regulator • Automotive LED Drivers • General LED Illumination TYPICAL APPLICATION DIAGRAM 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCT PREVIEW information concerns products in the Copyright © 2012, Texas Instruments Incorporated formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. |
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