TPS92551, TPS92551EVM

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SNVS805C – MAY 2012 – REVISED MAY 2013

450mA 23W Constant Current Buck LED Driver Micro-Module

Check for Samples: TPS92551, TPS92551EVM

1

FEATURES

DESCRIPTION

The TPS92551 Constant Current Buck LED Driver

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•

Integrated All Power Components Including

Micro-Module drives maximum 450mA LED current

the Power Inductor

up to 16 LEDs in a single string (maximum 23W). It

•

Wide Input Voltage Range : 4.5V - 60V

integrates all the power components including the

•

Constant Switching Frequency at 800kHz

power inductor. The TPS92551 provides a full turn-

key, highly efficient solution for wide range of single

•

High Contrast Ratio (Minimum Dimming

string LED lighting applications with up to 95% power

Current Pulse width < 16µs)

efficiency. It accepts an input voltage ranging from

•

Drives up to 16 LEDs in series at 60V input

4.5V to 60V and delivers a 350mA LED current as

•

±3.5% Typical LED Current Accuracy

default. The LED current is adjustable from 300mA to

450mA by charging a single external resistor.

•

LED Current Adjustable from 300mA to 450mA

The module operates at constant switching frequency

•

Up to 95% Efficiency

(800kHz) with low Electro Magnetic Interference(EMI)

•

TPS92551 Modules can be Connected in

complying with EN55015 standard. The module has

Parallel for Higher Current Operation

fast control loop to realize fine LED current pulse

•

Input Under-Voltage Lock-Out (UVLO)

yielding 256–step PWM dimming resolution at 240Hz

for

general

lighting.

Protection

features

include

•

Compatible with Ceramic and Low ESR

thermal shutdown, input under-voltage lockout, LED

Capacitors

open-circuit

and

short-circuit

protections.

The

•

Low Electro Magnetic Interference (EMI)

TPS92551 Micro-Module is available in 7-pin PFM

power package.

•

LED Open and Short Circuit Protections

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Thermal Shutdown and RoHS Compliant

•

-40

˚C to +125˚C Junction Temperature Range

APPLICATIONS

•

General Lighting, Desk Lamps

–

Cabinet Lamps

(1)

board, with one ounce copper , thirty five

–

Decorative Lamps

12 mil thermal vias, no air flow, and 1W

–

Street Lamps

power dissipation.

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Architecture Lighting, Recess Lights

Figure 1. 7-Pin PFM Package

10.16 x 13.77 x 4.57 mm (0.4 x 0.39 x 0.18 in)

–

Spot Lights

(1)

–

Underwater Lights

RoHS Compliant

PACKAGE HIGHLIGHTS

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7-Lead Easy-to-Use Package (Similar to TO-

263)

•

Single Exposed Die Attach Pad for Enhanced

Thermal Performance

•

10.2 x 13.8 x 4.6 mm Package

(1)

EN55015, refer to Figure 35 and Figure 36

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PRODUCTION DATA information is current as of publication date.

Copyright © 2012–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.