Texas Instruments LM3409 Demonstration Board LM3409EVAL/NOPB LM3409EVAL/NOPB Datenbogen
Produktcode
LM3409EVAL/NOPB
IADJ
EN
CSN
LM3409/HV
UVLO
D1
L1
C
IN
V
IN
I
LED
VCC
COFF
GND
Q1
CSP
C
F
R
OFF
PGATE
C
OFF
R
UV2
R
UV1
DAP
VIN
V
O
R
SNS
1
2
3
4
5
6
7
8
9
10
SNVS602J – MARCH 2009 – REVISED MAY 2013
PFET Buck Controller for High Power LED Drivers
Check for Samples:
,
1
FEATURES
DESCRIPTION
The LM3409/09N/09HV/09Q/09QHV are P-channel
2
•
LM3409Q/LM3409QHV is an Automotive Grade
MosFET (PFET) controllers for step-down (buck)
Product That is AEC-Q100 Grade 1 Qualified
current regulators. They offer wide input voltage
•
2
Ω
, 1A Peak MosFET Gate Drive
range, high-side differential current sense with low
•
V
IN
Range: 6V to 42V
adjustable
threshold
voltage
and
fast
output
enable/disable function and a thermally enhanced
(LM3409/LM3409Q/LM3409N)
VSSOP-10 package. These features combine to
•
V
IN
Range: 6V to 75V (LM3409HV/LM3409QHV)
make the LM3409 family of devices ideal for use as
•
Differential, High-side Current Sense
constant current sources for driving LEDs where
•
Cycle-by-Cycle Current Limit
forward currents up to 5A are easily achievable.
•
No Control Loop Compensation Required
The LM3409 devices use Constant Off-Time (COFT)
control to regulate an accurate constant current
control to regulate an accurate constant current
•
10,000:1 PWM Dimming Range
without
the
need
for
external
control
loop
•
250:1 Analog Dimming Range
compensation. Analog and PWM dimming are easy to
•
Supports All-Ceramic Output Capacitors and
implement and result in a highly linear dimming range
Capacitor-less Outputs
with
excellent
achievable
contrast
ratios.
Programmable UVLO, low-power shutdown, and
•
Low Power Shutdown and Thermal Shutdown
thermal shutdown complete the feature set.
•
Thermally Enhanced VSSOP-10 Package
The LM3409/09Q/09N have an operational input
•
Dual Inline Package (LM3409N)
voltage range up to 42V, while the LM3409HV/QHV
are high voltage options with an input voltage range
are high voltage options with an input voltage range
APPLICATIONS
up to 75V. The LM3409/09HV/09Q/09QHV come in a
•
LED Driver
thermally enhanced 10-lead VSSOP package, while
the LM3409N comes in a 14-lead PDIP package. The
the LM3409N comes in a 14-lead PDIP package. The
•
Constant Current Source
LM3409Q/LM3409QHV
are
automotive
grade
•
Automotive Lighting
products that are AEC-Q100 grade 1 qualified.
•
General Illumination
Typical Application
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.