Product details

Input voltage (type) DC/DC Topology Buck Vin (Min) (V) 4.5 Vin (Max) (V) 65 Iout (Max) (A) 0.5 Iq (Typ) (mA) 2.8 Features Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM
Input voltage (type) DC/DC Topology Buck Vin (Min) (V) 4.5 Vin (Max) (V) 65 Iout (Max) (A) 0.5 Iq (Typ) (mA) 2.8 Features Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM
HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • Wide Input Voltage Range: 4.5 V to 65 V
  • Requires NO External Current Sensing Resistor
  • Requires NO External Loop Compensation
  • Ease of Use, Needs Minimum 5 Components
  • 1000:1 Contrast Ratio Feasible
  • Single Layer PCB Feasible
  • Can Work as High Voltage Buck Regulators
  • Can Work as Linear Current Shunt Regulators
  • Integrated Low-side N-channel MOSFET
  • LED Current Programmable up to 0.5 A
  • Typically ±3.6% LED Current Accuracy
  • Switching Frequency Programmable From 50 kHz to 500 kHz
  • Current Limit Protection
  • VCC Under-voltage Lock-out
  • Thermal Shutdown Protection
  • Support Analog Dimming and Thermal Foldback
  • Power Enhanced SOIC-8 Exposed Thermal Pad Package (HSOP-8)
  • Wide Input Voltage Range: 4.5 V to 65 V
  • Requires NO External Current Sensing Resistor
  • Requires NO External Loop Compensation
  • Ease of Use, Needs Minimum 5 Components
  • 1000:1 Contrast Ratio Feasible
  • Single Layer PCB Feasible
  • Can Work as High Voltage Buck Regulators
  • Can Work as Linear Current Shunt Regulators
  • Integrated Low-side N-channel MOSFET
  • LED Current Programmable up to 0.5 A
  • Typically ±3.6% LED Current Accuracy
  • Switching Frequency Programmable From 50 kHz to 500 kHz
  • Current Limit Protection
  • VCC Under-voltage Lock-out
  • Thermal Shutdown Protection
  • Support Analog Dimming and Thermal Foldback
  • Power Enhanced SOIC-8 Exposed Thermal Pad Package (HSOP-8)

The TPS92511 is an easy to use 65V constant current buck converter for driving a single LED string with current up to 0.5A and efficiency up to 95%.  Only 5 external components are required for basic operation and single layer PCB layout is feasible because of the integration of a N-MOSFET, no external current sensing resistor, no external compensation and the proper terminal assignment.  A high-value external resistor programs the LED current so that fine tuning of the LED current can be achieved.  Another high-value external resistor programs a constant switching frequency from 50kHz to 500kHz. EMI design becomes easier as a result of constant switching frequency.  The TPS92511 provides a wide input voltage range from 4.5V to 65V.  By adding simple external circuits, the device can handle applications with even higher input voltages.

The TPS92511 employs a proprietary control scheme to regulate the LED current without the need of sensing the LED current directly. It applies a floating buck topology with a low-side N-channel power MOSFET, which does not need boot-strapping capacitor. For multiple channel systems, the floating buck topology together with the proprietary control scheme allows a common-anode connection of the LED strings without an external current sensing network.  This significantly reduces the number of wiring and as well as overall manufacturing cost.

The TPS92511 has very fast PWM dimming response time. For example, if the switching frequency is 500 kHz, the minimum DIM pulse width is 6µs and the dimming frequency is 150Hz, a contrast ratio of more than 1000:1 can be achieved.

The TPS92511 is available in the Power Enhanced SOIC-8 exposed thermal pad package.

For all available packages, see the orderable addendum at the end of the datasheet.

The TPS92511 is an easy to use 65V constant current buck converter for driving a single LED string with current up to 0.5A and efficiency up to 95%.  Only 5 external components are required for basic operation and single layer PCB layout is feasible because of the integration of a N-MOSFET, no external current sensing resistor, no external compensation and the proper terminal assignment.  A high-value external resistor programs the LED current so that fine tuning of the LED current can be achieved.  Another high-value external resistor programs a constant switching frequency from 50kHz to 500kHz. EMI design becomes easier as a result of constant switching frequency.  The TPS92511 provides a wide input voltage range from 4.5V to 65V.  By adding simple external circuits, the device can handle applications with even higher input voltages.

The TPS92511 employs a proprietary control scheme to regulate the LED current without the need of sensing the LED current directly. It applies a floating buck topology with a low-side N-channel power MOSFET, which does not need boot-strapping capacitor. For multiple channel systems, the floating buck topology together with the proprietary control scheme allows a common-anode connection of the LED strings without an external current sensing network.  This significantly reduces the number of wiring and as well as overall manufacturing cost.

The TPS92511 has very fast PWM dimming response time. For example, if the switching frequency is 500 kHz, the minimum DIM pulse width is 6µs and the dimming frequency is 150Hz, a contrast ratio of more than 1000:1 can be achieved.

The TPS92511 is available in the Power Enhanced SOIC-8 exposed thermal pad package.

For all available packages, see the orderable addendum at the end of the datasheet.

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Technical documentation

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Type Title Date
* Data sheet TPS92511 500-mA, 65-V Common Anode Constant Current Buck LED Driver Without External Current Sensing Resistor datasheet (Rev. A) 16 May 2014
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Technical article Here's how body electronics and lighting technology are changing the driving experience 26 Sep 2016
Technical article LED brightness adjustment: high-frequency PWM dimming 26 Aug 2016
Technical article Take better selfies with innovative LED flashes 18 Nov 2014
Technical article Solving the automotive EMI issues in new cars with all the screens 11 Sep 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS92511EVM — TPS92511 Evaluation Board

The TPS92511EVM is an LED driver for a single string of 12 LEDs with an LED current of 0.5A.  With the proprietary Pulse Level Modulation (PM) technology and integrated current sensing resistor, the EVM achieves good LED current regulation and a low component count.

Not available on TI.com
Simulation model

TPS92511 PSpice Transient Model

SNVM561.ZIP (551 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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