LT3922IUFD-1#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
Analog Devices LT3922-1 synchronous step-up LED driver supporting 36V output and up to 2A LED current in a 28-pin QFN package. Drives 2-string LED arrays with high efficiency synchronous switching. Available in lead-free version with worldwide in-stock distribution.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- LT3922IUFD-1#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.7400(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT3922IUFD-1#PBF?
- 36V output synchronous boost topology driving up to 2A LED current with 2-string support
- 28-pin QFN package for compact, thermally efficient LED driver PCB layouts
- Integrated MOSFET synchronous rectifier reducing external component count
- Analog and PWM dimming capability for precise LED brightness control
What is LT3922IUFD-1#PBF used for?
The LT3922IUFD-1 is designed for high-brightness LED backlighting in automotive infotainment displays, industrial HMI panels, and medical monitor applications. Its 36V synchronous boost architecture efficiently drives 2-string LED arrays from a single supply, making it ideal for compact display modules where space and thermal constraints are critical. It also suits architectural lighting and LED signage requiring stable current regulation across a wide input voltage range.
What are the specifications of LT3922IUFD-1#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1712 |
| Date Of Intro | 2018-07-09 |
| YTEOL | 10 |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | R-PQCC-N28 |
| JESD-609 Code | e3 |
| Multiplexed Display Capability | NO |
| Number of Functions | 1 |
| Number of Segments | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC28,.16X.2,20 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max | 36V |
| Supply Voltage-Min | 2.8V |
| Supply Voltage-Nom | 12V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LT3922IUFD-1#PBF datasheet?
LT3922IUFD-1#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT3922IUFD-1#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What maximum output voltage and LED current can the LT3922IUFD-1 deliver in a step-up configuration?
The LT3922IUFD-1 supports up to 36V output voltage and can deliver a maximum of 2A LED current across 2 LED strings. Its synchronous step-up topology maintains high efficiency even at elevated output voltages, making it suitable for driving series strings of 8 to 12 white LEDs per channel in automotive and industrial display backlights.
How does the 28-pin QFN package of LT3922IUFD-1 benefit a thermally demanding LED driver design?
The 28-pin QFN package of LT3922IUFD-1 provides an exposed thermal pad that significantly reduces junction-to-board thermal resistance, typically below 20°C/W, allowing continuous 2A operation without excessive heatsinking. At a compact footprint of approximately 4mm x 4mm, it frees board area compared to TSSOP alternatives while improving heat dissipation through direct PCB copper contact, critical for sustained brightness in automotive LED backlights.
Which dimming method should be used with LT3922IUFD-1 for flicker-free display backlighting?
For flicker-free backlighting, LT3922IUFD-1 supports both analog dimming via a control voltage pin and PWM dimming at frequencies up to several kilohertz. PWM dimming at 1 kHz or higher eliminates visible flicker in automotive displays while maintaining precise LED current regulation. Analog dimming is preferred when electromagnetic interference must be minimized, as it avoids the harmonic content generated by PWM switching at lower duty cycles.
When is LT3922IUFD-1 a better fit than a buck LED driver for a 12V automotive display backlight?
LT3922IUFD-1, a step-up (boost) driver, is the correct choice when the LED string forward voltage at 2A exceeds the 12V supply rail, which occurs with 4 or more series-connected white LEDs requiring approximately 12V to 36V. A buck driver cannot boost voltage above its input, so the LT3922 fills the gap for automotive 12V systems driving high-count LED strings in HMI displays, overhead lighting, and rear-seat entertainment panels.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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