VCC

CSN

TPS92515

SW

1

2

3

4

IADJ

PWM

COFF

GND

10

9

8

7

5

6

DRN

VIN

BOOT

PAD

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS92515, TPS92515-Q1, TPS92515HV, TPS92515HV-Q1

SLUSBZ6A – APRIL 2016 – REVISED AUGUST 2016

TPS92515x 2-A, Buck LED Driver with Integrated N-channel FET,

High-Side Current Sense, and Shunt FET PWM Dimming Capability

1

1 Features

1

•

AEC-Q100 Grade 1 Qualified

•

Integrated 290-mΩ (typ) Internal N-Channel FET

•

Input Voltage Range:

–

TPS92515x: 5.5 V to 42 V

–

TPS92515HVx: 5.5 V to 65 V

–

Operation Down to 5.15 V After Start-Up

•

Low Offset High-side Peak Current Comparator

•

Constant Average Current, up to 2 A

•

Inherent Cycle-by-Cycle Current Limit

•

Multiple Dimming Methods

–

10,000:1 Shunt PWM Dimming Range

–

1000:1 PWM Dimming Range

–

200:1 Analog Dimming Range

•

Simple Constant Off-time Control

–

No Loop Compensation

–

Fast Transient Response

•

Thermally Enhanced HVSSOP Package

•

Integrated Thermal Protection

2 Applications

•

Automotive Lighting: LED Switched Matrix AFS

Headlamps, DRL, High/Low Beam, Fog, Rear,

Turn Signal, Side Marker, Aftermarket

•

Industrial Lighting: Factory Automation, Time of

Flight (TOF), Appliances, Retail Illumination,

Machine Vision and Inspection, Emergency, Exit

and/or Safety Lighting, Medical Lighting, Stage

and Area Lighting

•

Agricultural, Marine, and Heavy Industry Lighting

•

High Contrast Shunt FET Dimming

3 Description

The TPS92515 family of devices are compact

monolithic switching regulators integrating a low

resistance N-Channel MOSFET. The devices are

intended for high-brightness LED lighting applications

where efficiency, high bandwidth, PWM and/or analog

dimming and small size are important.

The regulator operates using a constant off-time,

peak current control. The operation is simple: after an

off-time based on the output voltage, an on-time

begins. The on-time ends once the inductor peak

current threshold is reached. The TPS92515 device

can be configured to maintain a constant peak-to-

peak ripple during the ON and OFF periods of a

shunt

FET

dimming

cycle.

This

is

ideal

for

maintaining a linear response across the entire shunt

FET dimming range.

Steady-state accuracy is aided by the inclusion of a

low-offset, high-side comparator. LED current can be

modulated using either Analog or PWM dimming, or

both simultaneously. Other features include UVLO,

wide input voltage operation, inherent LED Open

operation and wide operating temperature range with

thermal shut-down.

The TPS92515 and TPS92515-Q1 devices have an

operational input range up to 42 V. The TPS92515HV

and TPS92515HV-Q1 offer high-voltage options with

an input range up to 65 V. All are available in a

thermally enhanced 10-pin HVSSOP package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS92515

HVSSOP (10)

3 mm x 3 mm

TPS92515-Q1

TPS92515HV

TPS92515HV-Q1

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Buck LED Driver Application