0
ACTIVE
Input voltage type |
DC/DC |
Topology |
Buck |
Vin (min) (V) |
6 |
Vin (max) (V) |
42 |
Vout (max) (V) |
42 |
Vout (min) (V) |
1.24 |
Iout (max) (A) |
5 |
Iq (typ) (mA) |
2 |
Features |
Adjustable Switch Frequency, Enable/Shutdown, Precision Dimming Control, Thermal shutdown |
Operating temperature range (°C) |
-40 to 125 |
Dimming method |
Analog, PWM |
Number of channels |
1 |
Rating |
Catalog |
HVSSOP (DGQ)-10-14.7 mm² 3 x 4.9
The LM3409, LM3409-Q1, LM3409HV, and LM3409HV-Q1 are P-channel MOSFET (PFET) controllersfor step-down (buck) current regulators. They offer wide input voltage range, high-sidedifferential current sense with low adjustable threshold voltage and fast output enable/disablefunction and a thermally enhanced 10-pin, HVSSOP package. These features combine to make the LM3409 family of devices ideal for use as constant current sources for driving LEDs where forward currentsup to 5 A are easily achievable.
The LM3409 devices use constant off-time (COFT) control to regulate an accurate constantcurrent without the need for external control loop compensation. Analog and PWM dimming are easy toimplement and result in a highly linear dimming range with excellent achievable contrast ratios. Programmable UVLO, low-power shutdown, and thermal shutdown complete the feature set.
For all available packages, see the orderable addendum at the end of the data sheet.WELL LINK CHIPS GROUP CO.,LIMITED FLAT/RM 1802 BEVERLY HOUSE 93-107 LOCKHART ROAD WANCHAI HK
