Analog Devices LT3762 | Demoboard DC2342A

Description

Demonstration circuit DC2342A is a 60V synchronous boost LED controller featuring the LT®3762. It drives a single string of LEDs at 2A up to 32V when VIN is between 7V and 28V. It runs down to 4VIN with reduced ILED and can withstand VIN transients as high as 30V. DC2342A runs at approximately 300kHz switching frequency. Spread spectrum frequency modulation (SSFM) can be turned on with a simple jumper, reducing EMI. DC2342A is designed for high power step-up LED controller applica-tions that require excellent efficiency across the VIN range. This demonstration circuit is protected against both open and short LED conditions, each having its own flag

Features

• 3000:1 External PWM Dimming
• 250:1 Internal PWM Dimming
• Wide VIN Operating Range: 2.5V to 38.5V
• Synchronous Boost Output Voltage up to 60V
• Spread-Spectrum Frequency Modulation for Lower EMI
• PMOS Switch Driver for PWM and Output Disconnect
• Constant Current (±3.5%) Regulation
• Constant Voltage (±2%) Regulation
• Rail-to-Rail LED Current Sense: 0V to 60V
• Programmable VIN Undervoltage Lockout
• Analog Dimming via Two Control Pins
• 100kHz to 1MHz Operation
• Programmable Open LED Protection with OPENLED Flag
• Short-Circuit Protection and SHORTLED Flag
• Drives LEDs in Boost, SEPIC, Buck Mode, or BuckBoost Mode Configurations
• 28 Lead TSSOP and QFN (4mm × 5mm) Exposed Pad Packages

More information

• Datasheet
• IC product information