0
ACTIVE
Input voltage type |
DC/DC |
Topology |
Buck |
Vin (min) (V) |
4.5 |
Vin (max) (V) |
30 |
Vout (max) (V) |
27 |
Vout (min) (V) |
0.45 |
Iout (max) (A) |
0.35 |
Iq (typ) (mA) |
0.78 |
Features |
Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal shutdown |
Operating temperature range (°C) |
-40 to 125 |
Dimming method |
PWM |
Number of channels |
1 |
Rating |
Catalog |
HVSSOP (DGN)-8-14.7 mm² 3 x 4.9
The LM3407 device is a constant current output floating buck switching converter designed to provide constant current to high-power LEDs. The device is ideal for automotive, industrial, and general lighting applications. The LM3407 has an integrated power N-channel MOSFET that makes the application solution compact and simple to implement. An external 1% thick-film resistor allows the converter output voltage to adjust as needed to deliver constant current within 10% accuracy to a serially connected LED string of varying number and type. Converter switching frequency is adjustable from 300 kHz to 1 MHz. The LM3407 features a dimming input to enable LED brightness control by Pulse Width Modulation (PWM). Additionally, a separate enable pin allows for low-power shutdown. An exposed pad MSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution.
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