Datasheet for LT3922-1:
- Manufacturer Part Number : LT3922-1
- Manufacturer : AD
- Description : 36V, 2.3A Synchronous Step-Up LED Driver with 25,000:1 PWM Dimming
- Series : LT3922-1
- Reference Price : USD 2.168
- Our Price : We have a better price, contact us by email
- Product Type : LED Driver IC
- Function : Step-Up (Boost) LED Drivers
- Current Suggest : Production
- Status : Production
- RoHS Status: -
- Voltage: -
- Feature: -
- Package Case: -
- Temperature Range: -
- Packing: Reel/Tray/Tube
- Standard Packing Quantity: -
- Country of Origin: -
- Other Part Number : LT3922-1
- 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 LT3922-1. If you need any more information about LT3922-1, you can also send us by email. Our email is [email protected], we will reply you in 12 hours.
- ±2% LED Current Regulation
- ±2% Output Voltage Regulation
- 25,000:1 PWM Dimming at 100Hz
- 128:1 Internal PWM Dimming
- Spread Spectrum Frequency Modulation
- Silent Switcher® Architecture for Low EMI
- Operates in Boost, Buck Mode and Buck-Boost Mode
- 2.8V to 36V Input Voltage Range
- Up to 34V LED String Voltage
- 2.3A, 40V Internal Switches
- 200kHz to 2MHz Switching Frequency with SYNC
- Analog or Duty Cycle LED Current Control
- Open/Short LED Protection and Fault Indication
- Thermally Enhanced 28-Lead (4mm × 5mm) QFN
The LT3922-1 is a monolithic, synchronous, step-up DC/DC converter that utilizes fixed-frequency, peak currentcontrol and provides PWM dimming for a string of LEDs.The LED current is programmed by an analog voltage orthe duty cycle of pulses at the CTRL pin. The LT3922-1will maintain ±2% current regulation through an externalsense resistor over a wide range of output voltages.
The switching frequency is programmable from 200kHzto 2MHz by an external resistor at the RT pin or by anexternal clock applied at the SYNC/SPRD pin. With theoptional spread spectrum frequency modulation enabled,the frequency varies from 100% to 125% to reduce EMI.The LT3922-1 also includes a driver for an external highside PMOS for PWM dimming and an internal PWM signalgenerator for analog control of PWM dimming. When anexternal signal is available, the LT3922-1 can perform25,000:1 PWM dimming with 100Hz PWM pulses.
Additional features include an accurate external referencevoltage for use with the CTRL and PWM pins, an LEDcurrent monitor, an accurate EN/UVLO pin threshold,open-drain fault reporting for open-circuit and short-circuitload conditions, and thermal shutdown.
Applications
- Automotive and Industrial Lighting
- Machine Vision
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
