LM3549SQX/NOPB
ActiveHIGH POWER SEQUENTIAL LED DRIVER
LM3549SQX/NOPB
ActiveHIGH POWER SEQUENTIAL LED DRIVER
Description
General part information
LM3549 Series
The LM3549 is a high power LED driver with up to 700mA output current. It has three constant current LED drivers and a buck boost SMPS for driving RGB LEDs with high efficiency. LED drivers are designed for sequential drive so only one driver can be enabled at a time.
LED driver output current settings can be stored to integrated non-volatile memory which allows stand-alone operation without I2C interface. Non-volatile memory is rewritable so current setting can be changed if needed.
The LM3549 has a fault detection feature that can detect several different fault conditions. In case of a fault error flags are set and FAULT output sends interrupt to control logic. Error flags can be read through I2C interface.
Technical Specifications
Parameters and characteristics for this part
| Specification | LM3549SQX/NOPB |
|---|---|
| Current - Output / Channel | 705 mA |
| Dimming | I2C |
| Frequency | 2.4 MHz |
| Internal Switch(s) | Yes |
| Mounting Type | Surface Mount |
| Number of Outputs | 3 |
| Operating Temperature (Max) | 85 °C |
| Operating Temperature (Min) | -30 °C |
| Package / Case | 24-WFQFN Exposed Pad |
| Package Length | 4 mm |
| Package Name | 24-WQFN |
| Package Width | 4 mm |
| Topology | Step-Up (Boost), Step-Down (Buck) |
| Type | DC DC Regulator |
| Voltage - Output | 4.6 V |
| Voltage - Supply (Max) | 5.5 V |
| Voltage - Supply (Min) | 2.7 V |
Pricing
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