IC manufacturers Texas Instruments

IC manufacturers (99)

Texas Instruments TPS92510

1.5-A Constant-Current Buck Converter for High-Brightness LEDs with Integrated LED Thermal Foldback

Overview

TopologyBuck Converter
Input voltage43-53 V
Switching frequency100-2500 kHz
Output 136 V / 0.74 A
IC revisionA

Description

The TPS92510 is a 60-V, 1.5-A peak current-mode step-down converter with an integrated high-side MOSFET. It is specifically designed for driving highbrightness LEDs with a constant current. The tight- tolerance, 200-mV internal reference voltage reduces power dissipation in the current-sense resistor. A dedicated pulse width modulation input pin allows linear control of the light output.

The TPS92510 integrates a thermal foldback feature that reduces the average output current to ensure that the sensed LED temperature never exceeds aspecific value, improving the reliability of the overall system. An integrated frequency synchronization feature allows a reduction of unwanted beatfrequencies in multi-string applications and simplifies EMI filtering. The adjustable input voltage UVLO feature accommodates the various deep discharge levels of multiple battery types.

The TPS92510 includes cycle-by-cycle overcurrent protection, and thermal shutdown protection. It is available in a 10-pin MSOP PowerPAD™ package.

Features

  • 3.5-V to 60-V Input Voltage Range
  • Integrated 200-m ohm High-Side MOSFET
  • 200 mV Internal Voltage Reference
  • ±3% LED Current Accuracy
  • 100 kHz to 2.5 MHz Switching Frequency Range
  • Dedicated PWM Dimming Input
  • LED Thermal Foldback
  • Adjustable UVLO
  • Overcurrent Protection
  • Over-Temperature Protection
  • MSOP-10 (DGQ) PowerPAD™ Package

Typical applications

  • General Illumination
  • Commercial Lighting
  • MR16 LED Bulbs
  • Emergency Lighting
  • Street Lighting
  • Industrial l Lighting

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
ISAT,10%
(A)
ISAT,30%
(A)
IR,40K
(A)
IRP,40K
(A)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
74477020SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-PD SMT Power Inductor 100 2.4 3.1 2.2 2.85 140 5.2 1280 Standard
Order Code Data­sheet Simu­lation
74477020SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
ISAT,10%
(A)
ISAT,30%
(A)
IR,40K
(A)
IRP,40K
(A)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples