Datasheet for LT3942:
- Manufacturer Part Number : LT3942
- Manufacturer : AD
- Description : 36V, 2A SynchronousBuck-Boost Converter andLED Driver
- Series : LT3942
- Reference Price : USD 2.36
- Our Price : We have a better price, contact us by email
- Product Type : LED Driver IC
- Function : Buck-Boost LED Drivers
- Current Suggest : Recommended for New Designs
- Status : Production
- RoHS Status: -
- Voltage: -
- Feature: -
- Package Case: -
- Temperature Range: -
- Packing: Reel/Tray/Tube
- Standard Packing Quantity: -
- Country of Origin: -
- Other Part Number : LT3942
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
Contact us to check the best price and real time inventory quantity for LT3942. If you need any more information about LT3942, you can also send us by email. Our email is [email protected], we will reply you in 12 hours.
- 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
- Proprietary Peak-Buck Peak-Boost Current Mode
- 3V to 36V Input Voltage Range
- 0V to 36V Output Voltage Range
- ±1.5% Output Voltage Regulation
- ±3% LED Current Regulation
- 5000:1 External and 128:1 Internal PWM Dimming
- Rail-to-Rail LED Current Sense and Monitor Output
- Open and Short LED Protection with Fault Reporting
- 300kHz to 2MHz Fixed Switching Frequency with External Frequency Synchronization
- Flicker-Free Spread Spectrum for Low EMI
- Available in 28-Lead QFN (4mm × 5mm)
The LT3942 is a monolithic 4-switch synchronous buck-boost LED driver. The driver can regulate the LED string current up to 34V with input voltages above, below, or equal to the output voltage. The proprietary peak-buck peak-boost current mode control scheme allows adjustable and synchronizable 300kHz to 2MHz fixed frequency operation, or internal 25% triangle spread spectrum operation for low EMI. With 3V to 36V input, 0V to 36V output and seamless low-noise transitions between operation regions, the LT3942 is ideal for LED driver applications in automotive, industrial and battery-powered systems.
The LT3942 provides LED current regulation with up to 128:1 internal and 5000:1 external PWM dimming using an optional high-side PMOS switch. The CTRL pin provides flexible 20:1 analog dimming with ±2.5% LED current regulation at 100mV full scale. Robust fault protection detects an open or short LED condition, during which the LT3942 retries, latches off, or keeps running.
Applications
- General Purpose LED Driver
- Automotive and Industrial Lighting
- Voltage Regulator with Accurate Current Limit
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
