Datasheet Linear Technology LT3932

Manufacturer	Linear Technology
Series	LT3932

36V, 2A Synchronous Step-Down LED Driver

Datasheets

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PDF, 1.2 Mb, Revision: A, File uploaded: Mar 27, 2018

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Prices

Packaging

	LT3932EUFD#PBF	LT3932EUFD#TRPBF	LT3932HUFD#PBF	LT3932HUFD#TRPBF	LT3932IUFD#PBF	LT3932IUFD#TRPBF
N	1	2	3	4	5	6
Package	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing
Package Code	UFD	UFD	UFD	UFD	UFD	UFD
Package Index	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712	05-08-1712
Pin Count	28	28	28	28	28	28

Parametrics

Parameters / Models	LT3932EUFD#PBF	LT3932EUFD#TRPBF	LT3932HUFD#PBF	LT3932HUFD#TRPBF	LT3932IUFD#PBF	LT3932IUFD#TRPBF
Demo Boards	DC2286A	DC2286A	DC2286A	DC2286A	DC2286A	DC2286A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Dimming	5000:1 PWM Dimming at 100Hz, 128:1 Internal PWM Dimming	5000:1 PWM Dimming at 100Hz, 128:1 Internal PWM Dimming	5000:1 PWM Dimming at 100Hz, 128:1 Internal PWM Dimming	5000:1 PWM Dimming at 100Hz, 128:1 Internal PWM Dimming	5000:1 PWM Dimming at 100Hz, 128:1 Internal PWM Dimming	5000:1 PWM Dimming at 100Hz, 128:1 Internal PWM Dimming
Export Control	no	no	no	no	no	no
Features	Spread Spectrum, Silent Switcher Architecture, External Synchronization, Resistor Set Frequency	Spread Spectrum, Silent Switcher Architecture, External Synchronization, Resistor Set Frequency	Spread Spectrum, Silent Switcher Architecture, External Synchronization, Resistor Set Frequency	Spread Spectrum, Silent Switcher Architecture, External Synchronization, Resistor Set Frequency	Spread Spectrum, Silent Switcher Architecture, External Synchronization, Resistor Set Frequency	Spread Spectrum, Silent Switcher Architecture, External Synchronization, Resistor Set Frequency
Frequency, kHz	2000	2000	2000	2000	2000	2000
Ishutdown, µA	2	2	2	2	2	2
Isupply, mA	2.2	2.2	2.2	2.2	2.2	2.2
Max Number of LEDs	10	10	10	10	10	10
Monolithic	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 125	-40 to 125	-40 to 85	-40 to 85
Output Current, A	2	2	2	2	2	2
Switch Current, A	3	3	3	3	3	3
Synchronous	yes	yes	yes	yes	yes	yes
Topology	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver
Vin Max, V	36	36	36	36	36	36
Vin Min, V	3.6	3.6	3.6	3.6	3.6	3.6
Vout Max, V	36	36	36	36	36	36

Eco Plan

	LT3932EUFD#PBF	LT3932EUFD#TRPBF	LT3932HUFD#PBF	LT3932HUFD#TRPBF	LT3932IUFD#PBF	LT3932IUFD#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Other Options

LT3932-1

Design Notes

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36V, 2A LED Driver with 5000:1 PWM Dimming Meets CISPR 25 Class 5 EMI Limits with Silent Switcher Architecture &mdash DN570
PDF, 446 Kb, File published: Nov 7, 2017
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Design Note
36V, 2A LED Driver with 5000:1 PWM Dimming Meets CISPRВ 25
Class 5 EMI Limits with Silent Switcher Architecture
Kyle Lawrence
Introduction
The LED backlights in automotive heads-up displays,
infotainment systems, and dashboard lighting must be
bright enough to compete with direct sunlight streaming
into a car during the day, yet capable of reducing brightness
by several orders of magnitude to avoid blinding a driver at
night. Generic LED drivers struggle to achieve such high
dimming ratios.
The LT3932 synchronous step-down LED driver with
integrated 36V, 2A switches features high ratio PWM
dimming. The LT3932 houses its high efficiency integrated
power switches inside a small 4mm Г— 5mm QFN package,
and can be run at up to 2MHz switching frequency for a
compact, high bandwidth design. When high dimming ratio
capability is not needed, and simplicity is paramount, its
internal PWM generator can be used to produce 128:1 PWM 9V TO
36V High PWM Dimming Ratio
With the LT3932 operating at a dimming frequency of
100Hz and a switching frequency of 2MHz, a high current …

Model Line

Series: LT3932 (6)

LT3932EUFD#PBF LT3932EUFD#TRPBF LT3932HUFD#PBF LT3932HUFD#TRPBF LT3932IUFD#PBF LT3932IUFD#TRPBF

Manufacturer's Classification

Power Management > LED Driver ICs > Step-Down (Buck) LED Drivers
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) LED Drivers