0
ACTIVE
Input voltage type |
AC/DC |
Topology |
Buck, Flyback |
Vin (min) (V) |
8 |
Vin (max) (V) |
13 |
Vout (max) (V) |
60 |
Vout (min) (V) |
9 |
Iout (max) (A) |
2 |
Iq (typ) (mA) |
1.58 |
Features |
Adjustable Switch Frequency, Thermal shutdown |
Operating temperature range (°C) |
-40 to 125 |
Dimming method |
Analog |
Number of channels |
1 |
Rating |
Catalog |
SOIC (D)-8-29.4 mm² 4.9 x 6
The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high-frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC undervoltage lockout. The LM3444 is available in a low profile 10-pin VSSOP package or an 8-lead SOIC package.
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