LT3932EUFD-1

LT3932EUFD-1属性

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LT3932EUFD-1描述

The LT®3932 , featuring the Silent Switcher®architecture
to minimize EMI/EMC emissions, utilizes fixed-frequency,
peak current control and provides PWM dimming for a
string of LEDs. The LED current is programmed by an analog
voltage or the duty cycle of pulses at the CTRL pin. An
output voltage limit can be set with a resistor divider to
the FB pin.
The switching frequency is programmable from 200kHz to
2MHz by an external resistor at the RT pin or by an external
clock at the SYNC/SPRD pin. With the optional spread
spectrum frequency modulation enabled, the frequency
varies from 100% to 125% to reduce EMI. The LT3932
also includes a driver for an external, high side PMOS for
PWM dimming and an internal PWM signal generator for
analog control of PWM dimming when an external signal is
not available. The LT3932-1 permits higher dimming ratios.
Additional features include an LED current monitor, an
accurate EN/UVLO pin threshold, open-drain fault reporting
for open-circuit and short-circuit load conditions, and
thermal shutdown.
LT3932EUFD#PBF
LT3932HUFD#TRPBF
LT3932IUFD#TRPBF
LT3932EUFD#TRPBF
LT3932IUFD#PBF
LT3932HUFD#PBF
LT3932EUFD-1#PBF
LT3932EUFD-1#TRPBF
LT3932IUFD-1#TRPBF
LT3932HUFD-1#PBF
LT3932HUFD-1#TRPBF
LT3932IUFD-1#PBF
DC2286A
n ±1.5% LED Current Regulation
n ±1.2% Output Voltage Regulation
n 5000:1/10000+:1 PWM Dimming at 100Hz
(LT3932/LT3932-1)
n 128:1 Internal PWM Dimming
n Spread-Spectrum Frequency Modulation
n Silent Switcher® Architecture for Low EMI
n 3.6V to 36V Input Voltage Range
n 0V to 36V LED String Voltage
n 200kHz to 2MHz with SYNC Function
n 99.9% Maximum Duty Cycle
n 20:1 Analog or Duty Cycle LED Current Control
n Open/Short LED Protection and Fault Indication
n Accurate LED Current Sense with Monitor Output
n Programmable UVLO
n Thermally Enhanced 28-Pin (4mm × 5mm) QFN
n Automotive Lighting
n Industrial and General Purpose Lighting
n Machine Vision Systems

LT3932EUFD#PBF LT3932EUFD#TRPBF 3932 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C
LT3932IUFD#PBF LT3932IUFD#TRPBF 3932 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C
LT3932HUFD#PBF LT3932HUFD#TRPBF 3932 28-Lead (4mm × 5mm) Plastic QFN –40°C to 150°C
LT3932EUFD-1#PBF LT3932EUFD-1#TRPBF 39321 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C
LT3932IUFD-1#PBF LT3932IUFD-1#TRPBF 39321 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C
LT3932HUFD-1#PBF LT3932HUFD-1#TRPBF 39321 28-Lead (4mm × 5mm) Plastic QFN –40°C to 150°C

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