LM3409HV Datasheet PDF


Part Number

LM3409HV

Description

P-FET Buck Controller

Manufacture

etcTI

Total Page 30 Pages
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Download LM3409HV Datasheet PDF


Features Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design LM3409, LM 3409-Q1, LM3409HV, LM3409HV-Q1 SNVS602L – MARCH 2009 – REVISED JUNE 2016 L M3409, -Q1, LM3409HV, -Q1 P-FET Buck Co ntroller for High-Power LED Drivers 1 Features •1 LM3409-Q1 and LM3409HV-Q1 are Automotive Grade Products: AEC-Q10 0 Grade 1 Qualified • 2-Ω, 1-A Peak MOSFET Gate Drive • VIN Range: 6 V t o 42 V (LM3409, LM3409-Q1) • VIN Rang e: 6 V to 75 V (LM3409HV, LM3409HV- Q1) • Differential, High-Side Current Se nse • 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 Capaci.
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LM3409HV Datasheet
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
Reference
Design
LM3409, LM3409-Q1, LM3409HV, LM3409HV-Q1
SNVS602L – MARCH 2009 – REVISED JUNE 2016
LM3409, -Q1, LM3409HV, -Q1 P-FET Buck Controller for High-Power LED Drivers
1 Features
1 LM3409-Q1 and LM3409HV-Q1 are Automotive
Grade Products: AEC-Q100 Grade 1 Qualified
• 2-, 1-A Peak MOSFET Gate Drive
• VIN Range: 6 V to 42 V (LM3409, LM3409-Q1)
• VIN Range: 6 V to 75 V (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
2 Applications
• LED Driver
• Constant Current Source
• Automotive Lighting
• General Illumination
3 Description
The 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 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
currents up to 5 A 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 easy to
implement 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM3409
HVSSOP (10)
PDIP (14)
3.00 mm × 3.00 mm
19.177 mm × 6.35 mm
LM3409-Q1
LM3409HV
HVSSOP (10)
3.00 mm × 3.00 mm
LM3409HV-Q1
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Schematic
RUV2
RUV1
1
UVLO
2
IADJ
10
VIN
9
VCC
CF
VIN
CIN
ROFF
COFF
3
EN
LM3409/HV
8
CSP
4
COFF
5
GND
DAP
7
CSN
6
PGATE
RSNS
Q1
L1
D1
VO
ILED
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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