TPS92515 Datasheet, PDF (1/39 Pages) Texas Instruments – 2-A, Buck LED Driver with Integrated N-channel FET,High-Side Current Sense, and Shunt FET PWM Dimming Capability

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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 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
TPS92515-Q1
TPS92515HV
HVSSOP (10)
3 mm x 3 mm
TPS92515HV-Q1
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Buck LED Driver Application
TPS92515
6 DRN
SW 5
7 ^CSN
BOOT 4
GND 3
V_IN
8 VIN
9 PWM VCC 2
10 IADJ COFF 1
PAD
V_OUT
Copyright © 2016, Texas Instruments Incorporated
1
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.