LM3409MY/NOPB ,PFET Buck Controller for High Power LED Drives 10-MSOP-PowerPAD -40 to 125features combine to make the• Differential, High-Side Current SenseLM3409 family of devices ideal f ..
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LM340AT-15 ,THREE TERMINAL POSITIVE FIXED VOLTAGE REGULATORSELECTRICAL CHARACTERISTICS (V = 10 V, I = 500 mA, T = T to T [Note 1], unless otherwise noted.)in O ..
LM340AT-5 ,THREE TERMINAL POSITIVE FIXED VOLTAGE REGULATORSELECTRICAL CHARACTERISTICS (V = 10 V, I = 500 mA, T = T to T [Note 1], unless otherwise noted.)in O ..
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LMK325BJ476MM-T , High Value Multilayer Ceramic Capacitors (High dielectric type)
LMN200B02-7 , 200 mA LOAD SWITCH FEATURING PRE-BIASED PNP TRANSISTOR AND N-MOSFET WITH GATE PULL DOWN RESISTOR
LMN400E01-7 , 400 mA LOAD SWITCH FEATURING PRE-BIASED PNP TRANSISTOR AND ESD PROTECTED N-MOSFET
LMP2011MA ,Single, High Precision, Rail-to-Rail Output Operational AmplifierFeaturesTheLMP201xseriesarethefirstmembersofNational’snew (For V = 5V, Typical unless otherwise not ..
LMP2011MF ,Single, High Precision, Rail-to-Rail Output Operational AmplifierFeaturesTheLMP201xseriesarethefirstmembersofNational’snew (For V = 5V, Typical unless otherwise not ..
LMP2011MFX ,Single, High Precision, Rail-to-Rail Output Operational AmplifierApplicationsOther useful benefits of the LMP201X are rail-to-rail output,n Precision instrumentatio ..
LM3409-LM3409MY/NOPB
PFET Buck Controller for High Power LED Drives
IADJ
CSN
LM3409/HVUVLO
CIN
VIN
VCC
COFF
GND Q1
CSP
ROFF
RUV2
RUV1
DAP
VIN
RSNS
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LM3409, LM3409-Q1, LM3409HV, LM3409HV-Q1SNVS602L –MARCH 2009–REVISED JUNE 2016
LM3409, -Q1, LM3409HV, -Q1 P-FET Buck Controller for High-Power LED Drivers Features LM3409-Q1 and LM3409HV-Q1 are Automotive
Grade Products: AEC-Q100 Grade1 Qualified 2-Ω, 1-A Peak MOSFET Gate Drive VIN Range:6Vto42V (LM3409, LM3409-Q1) VIN Range:6Vto75V (LM3409HV, LM3409HV-
Q1) Differential, High-Side Current Sense Cycle-by-Cycle Current Limit No Control Loop Compensation Required 10,000:1 PWM Dimming Range 250:1 Analog Dimming Range Supports All-Ceramic Output Capacitors and
Capacitor-less Outputs Low-Power Shutdown and Thermal Shutdown Thermally Enhanced 10-Pin, HVSSOP Package
Applications LED Driver Constant Current Source Automotive Lighting General Illumination
DescriptionThe LM3409, LM3409-Q1, LM3409HV, and
LM3409HV-Q1 are P-channel MOSFET (PFET)
controllers for step-down (buck) current regulators.
They offer wide input voltage range, high-side
differential current sense with low adjustable
threshold voltage and fast output enable/disable
function anda thermally enhanced 10-pin, HVSSOP
package. These features combine to make the
LM3409 familyof devices ideal for use as constant
current sources for driving LEDs where forward
currentsupto5A are easily achievable.
The LM3409 devices use constant off-time (COFT)
control to regulate an accurate constant current
without the need for external control loop
compensation. Analog and PWM dimming are easyto
implement and resultina highly linear dimming range
with excellent achievable contrast ratios.
Programmable UVLO, low-power shutdown, and
thermal shutdown complete the feature set.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application Schematic
