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Analog Devices LT3909 | Demoboard DC2176A
LT3909 - 2-String × 50mA, 2MHz Step-Up LED Driver with ±1.8% Current Matching
Overview
| Topology | Boost Converter |
| Input voltage | 7-36 V |
| Switching frequency | 1880-2120 kHz |
| Output 1 | 35 V / 0.04 A |
| IC revision | A |
Description
Demonstration circuit 2176A features the LT®3909, a2-string × 50mA, 2MHz step-up LED driver with ±1.8%current matching.The LT3909 precisely regulates two LED strings for equalcurrent, supports LED dimming that reduces brightnessdown to a 1/40,000 ratio, protects against faults and alsoreports faults. The LT3909 consists of a step-up converterwith a fixed 2MHz switching frequency and current sourcesfor the LED strings.
Typical applications
- PDAs, Handheld Computers
- Automotive Displays
- High Contrast Instrument Clusters
- GPS Receivers
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Mount | SamplesAvailability & Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-LHMI SMT Power Inductor, 6.8 µH, 2.35 A | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | Inductance6.8 µH | Performance Rated Current2.35 A | Saturation Current @ 10%2.4 A | Saturation Current @ 30%4.75 A | DC Resistance172 mΩ | Self Resonant Frequency29 MHz | MountSMT | –Check availability |
Availability Forecast
WE item number Packaging unitsLead time
––– weeks
| Expected Availability | Opening inventory | Quantity |
|---|---|---|
| Current Availability | – | – |
There is no forecast for this quantity request.
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