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Product details

Parameters

Input voltage (type) DC/DC Vin (Min) (V) 7 Vin (Max) (V) 85 Iout (Max) (A) 5 Vout (Min) (V) 0 Vout (Max) (V) 83 Regulated outputs (#) 1 Topology Buck Dimming method Analog, PWM Power factor correction (Min) Features Adjustable Switch Frequency, Enable/Shutdown, Precision Dimming Control, Thermal Shutdown Operating temperature range (C) -40 to 125 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1000 Iq (Typ) (mA) 2 Vref (V) 3 open-in-new Find other General lighting LED drivers

Package | Pins | Size

HTSSOP (PWP) 14 32 mm² 5 x 6.4 open-in-new Find other General lighting LED drivers

Features

  • VIN Range from 7 V to 85 V
  • Wide Dimming Range
    • 500:1 Analog Dimming
    • 2500:1 Standard PWM Dimming
    • 20000:1 Shunt FET PWM Dimming
  • Adjustable LED Current Sense Voltage
  • 2-Ω, 1-Apeak MOSFET Gate Drivers
  • Shunt Dimming MOSFET Gate Driver (TPS92641)
  • Programmable Switching Frequency
  • Precision Voltage Reference 3 V ±2%
  • Input UVLO and Output OVP
  • Low Power Shutdown Mode and Thermal Shutdown
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Description

The TPS92640 and TPS92641 devices are high-voltage, synchronous NFET controllers for buck-current regulators. Output current regulation is based on valley current-mode operation using a controlled on-time architecture. This control method eases the design of loop compensation while maintaining nearly constant switching frequency. The TPS92640 and TPS92641 devices include a high-voltage start-up regulator that operates over a wide input range of 7 V to 85 V. The PWM controller is designed for high speed capability, including an oscillator frequency range up to 1 MHz. The deadtime between high side and low side gate driver is optimized to provide very high efficiency over a wide input operating voltage and output power range. The TPS92640 and TPS92641 devices accept both analog and PWM input signals, resulting in exceptional dimming control range. Linear response characteristics between input command and LED current is achieved with true zero LED current using low off-set error amplifier and proprietary PWM dimming logic. Both devices also include precision reference capable of supplying current to low power microcontroller. Protection features include cycle-by-cycle current protection, overvoltage protection, and thermal shutdown. The TPS92641 device includes a shunt FET dimming input and MOSFET driver for high resolution PWM dimming.

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Technical documentation

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Type Title Date
* Datasheet TPS9264x Synchronous Buck Controllers for Precision Dimming LED Drivers datasheet (Rev. A) Oct. 28, 2015
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Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

Using TPS92641 to drive 10 LEDs in series at 1A current.


Related Terms:

  • DC DC LED current controller
  • DC DC LED Buck current controller
Features
  • VIN Range 43V to 53V
  • Drive 10 LEDs in series at 1A
  • High efficiency Sync. Rect. Buck
  • Current regulation within 3%
  • Support PWM dimming

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 14 View options

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