TPS92512DGQT datasheet(6/30 Pages) TI1

Part #	TPS92512DGQT

Description	2.5A Buck LED Driver with Integrated Analog Current Adjust

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Manufacturer	TI1 [Texas Instruments]

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TPS92512, TPS92512HV

SLVSCT1B – FEBRUARY 2015 – REVISED APRIL 2015

www.ti.com

Electrical Characteristics (continued)

–40°C

≤ TJ ≤ 125°C, VVIN = 12V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

THERMAL SHUTDOWN

TSD

Thermal shutdown

165

°C

Thermal shutdown hysteresis

20

TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK)

VRT

RT/CLK regulated voltage

RRT = 200 kΩ

474

500

513

mV

fSW

Switching frequency

VVIN = 6 V, RRT = 200 kΩ

447

557

648

kHz

RT/CLK high threshold

VVIN = 6 V

1.49

1.81

V

RT/CLK low threshold

VVIN = 6 V

0.63

1.02

V

PWM DIMMING (PDIM)

IPDIM

PDIM source current

VPDIM = 0

1.04

µA

VIH

High-level input voltage

1.34

1.45

V

VIL

Low-level input voltage

0.79

0.88

7.6 Timing Requirements

MIN

NOM

MAX

UNIT

TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK)

RT/CLK falling edge to PH rising

Measured at 500 kHz with RT

92.1

ns

edge delay

resistor in series, VVIN = 6 V

Phase loop (PLL) lock-in time

fSW = 500 kHz

100

µs

PWM DIMMING (PDIM)

tRISE

Rising propagation delay

305

ns

tFALL

Falling propagation delay

535

6

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