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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) | True |
| Mounting Type | Surface Mount |
| Number of Outputs | 3 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -30 °C |
| Package / Case | 24-WFQFN Exposed Pad |
| Supplier Device Package | 24-WQFN (4x4) |
| Topology | Step-Down (Buck), Step-Up (Boost) |
| Type | DC DC Regulator |
| Voltage - Output | 4.6 V |
| Voltage - Supply (Max) | 5.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 4500 | $ 3.29 | |
| Texas Instruments | LARGE T&R | 1 | $ 4.62 | |
| 100 | $ 3.76 | |||
| 250 | $ 2.96 | |||
| 1000 | $ 2.51 | |||
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.
