Topology | Buck Converter |
Input voltage | 6-16 V |
Switching frequency | 300-2000 kHz |
IC revision | A |
The LT®3950 is a multitopology DC/DC converter designed specifically to drive high current LEDs. It contains a 1.5A,60V DMOS switch and supports an external PWM dimming PMOS. The LT3950 has an internal PWM generator for dimming that maps an analog control signal to anexponential scale used to define PWM dimming duty ratio. Using an exponential scale to define duty ratio preservesdimming resolution across a wide range of LED current. In addition to operating as a constant current source, the LT3950 also provides output voltage regulation. This canbe used to prevent damage to the part in case of open LED events. A programmable switching frequency offers flexibilityin design for higher efficiency or reduced component size. Enabling spread spectrum frequency modulation reduces EMI. The switching frequency can also easily be synchronized by driving the SYNC/SPRD pin with an external clock. LED current is programmed with a single external sense resistor and can be adjusted from zero tofull-scale by an analog signal at the CTRL pin.
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 | Samples | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
74437321022 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LHMI SMT Power Inductor | 2.2 | 3.5 | 3.2 | 6.2 | 80 | 55 | SMT |
Order Code | Datasheet | Simulation | |
---|---|---|---|
74437321022 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. |
Samples |
---|
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 | Samples |
---|