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News
36V, 2A Monolithic Synchronous Step-Down LED Driver with Silent Switcher Topology Minimizes EMI Concerns
2017-07-11 | ReturnThe LT3932 can deliver efficiencies of 93% while switching at 2MHz, eliminating the need for external heat sinking and offering a tiny, compact solution footprint. Internal open/short LED protection and fault indication offers added reliability. The LT3932’s switching frequency is programmable from 200kHz to 2MHz or it can be synchronized to an external clock signal. Combined with a thermally enhanced 4mm x 5mm QFN package, the LT3932 offers a very compact high power LED driver solution. Other features include accurate LED current sense with a monitor output, 99.9% duty cycle operation and programmable UVLO.
The LT3932EUFD is available in a thermally enhanced 28-lead 4mm x 5mm QFN package. Three temperature grades are available, with operation from –40°C to 125°C (junction) for the extended, industrial grades and a high temperature grade of –40°C to 150°C. Pricing starts at $3.95 each in 1,000-piece quantities and all versions are available from stock. For more information, go to www.linear.com/product/LT3932.
Summary of Features: LT3932
• ±1.5% LED Current Regulation
• ±1.2% Output Voltage Regulation
• 5000:1 PWM Dimming at 100Hz
• 128:1 Internal PWM Dimming
• Spread Spectrum Frequency Modulation
• Silent Switcher® Architecture for Low EMI
• 3.6V to 36V Input Voltage Range
• 0V to 36V LED String Voltage
• 2A, 36V Internal Switches
• 200kHz to 2MHz with SYNC Function
• 99.9% Maximum Duty Cycle
• Analog or Duty Cycle LED Current Control
• Open/Short LED Protection & Fault Indication
• Accurate LED Current Sense with Monitor Output
• Programmable UVLO
• Thermally Enhanced 28-Lead (4mm × 5mm) QFN
Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.
Source:http://www.linear.com/