Regulator. LM3406HV-Q1 Datasheet

LM3406HV-Q1 Datasheet PDF


Part

LM3406HV-Q1

Description

1.5-A Constant Current Buck Regulator

Manufacture

etcTI

Page 30 Pages
Datasheet
Download LM3406HV-Q1 Datasheet PDF


LM3406HV-Q1 Datasheet
LM3406, LM3406HV, LM3406HV-Q1
SNVS512E – SEPTEMBER 2008 – REVISED MARCH 2014
LM3406 1.5-A, Constant Current, Buck Regulator for Driving High Power LEDs
1 FEATURES
1 LM3406HV-Q1
– Automotive Grade Device
– AEC-Q100 Grade 1 Qualified
– Operating Ambient Temperature: –40°C to
125°C
• Integrated 2.0A MOSFET
• VIN Range 6V to 42V (LM3406)
• VIN Range 6V to 75V (LM3406HV)
• VIN Range 6V to 75V (LM3406HV-Q1)
• True Average Output Current Control
• 1.7A Minimum Output Current Limit Over
Temperature
• Cycle-by-Cycle Current Limit
• PWM Dimming with Dedicated Logic Input
• PWM Dimming with Power Input Voltage
• Simple Control Loop Compensation
• Low Power Shutdown
• Supports All-Ceramic Output Capacitors and
Capacitor-less Outputs
• Thermal Shutdown Protection
• TSSOP-14 Package
3 DESCRIPTION
The LM3406 family are monolithic switching
regulators designed to deliver constant currents to
high power LEDs. Ideal for automotive, industrial, and
general lighting applications, they contain a high-side
N-channel MOSFET switch with a current limit of
2.0A (typical) for step-down (Buck) regulators.
Controlled on-time with true average current and an
external current sense resistor allow the converter
output voltage to adjust as needed to deliver a
constant current to series and series-parallel
connected LED arrays of varying number and type.
LED dimming via pulse width modulation (PWM) is
achieved using a dedicated logic pin or by PWM of
the power input voltage. The product feature set is
rounded out with low-power shutdown and thermal
shutdown protection.
The LM3406HV-Q1 is AEC-Q100 grade 1 qualified.
2 APPLICATIONS
• LED Driver
• Constant Current Source
• Automotive Lighting
• General Illumination
• Industrial Lighting
3.1 TYPICAL APPLICATION
VIN
CIN
CB
RON
VIN,VINS
RON
BOOT
SW
LM3406/06HV
VOUT
DIM CS
COMP
GND
VCC
CC
L1
D1
RSNS
CF
IF
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.

LM3406HV-Q1 Datasheet
LM3406, LM3406HV, LM3406HV-Q1
SNVS512E – SEPTEMBER 2008 – REVISED MARCH 2014
www.ti.com
3.1 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
3.1 CONNECTION DIAGRAM
LM3406 family
1 SW
VIN 14
2 SW
VIN 13
3 BOOT
VINS
12
4 NC
DAP
VCC
11
5 VOUT
RON
10
6 CS
COMP
9
7 GND
DIM 8
14-Lead Exposed Pad Plastic TSSOP Package
See Package Number PWP0014A
Pin(s)
1,2
3
4
5
6
7
8
Name
SW
BOOT
NC
VOUT
CS
GND
DIM
9
10
11
12
13,14
DAP
COMP
RON
VCC
VINS
VIN
DAP
PIN DESCRIPTIONS
Description
Application Information
Switch pin
Connect these pins to the output inductor and Schottky diode.
MOSFET drive bootstrap pin
Connect a 22 nF ceramic capacitor from this pin to the SW pins.
No Connect
No internal connection. Leave this pin unconnected.
Output voltage sense pin
Connect this pin to the output node where the inductor and the first LED's
anode connect.
Current sense feedback pin
Set the current through the LED array by connecting a resistor from this pin
to ground.
Ground pin
Connect this pin to system ground.
Input for PWM dimming
Connect a logic-level PWM signal to this pin to enable/disable the power
MOSFET and reduce the average light output of the LED array. Logic high
= output on, logic low - output off.
Error amplifier output
Connect a 0.1 µF ceramic capacitor with X5R or X7R dielectric from this pin
to ground.
On-time control pin
A resistor connected from this pin to VIN sets the regulator controlled on-
time.
Output of the internal 7V linear
regulator
Bypass this pin to ground with a minimum 0.1 µF ceramic capacitor with
X5R or X7R dielectric.
Input voltage PWM dimming
comparator input
Connect this pin to the anode of the input diode to allow dimming by PWM
of the input voltage
Input voltage pin
Nominal operating input range for this pin is 6V to 42V (LM3406) or 6V to
75V (LM3406HV, LM3406HV-Q1).
Thermal Pad
Connect to ground. Place 4-6 vias from DAP to bottom layer ground plane.
2 Submit Documentation Feedback
Copyright © 2008–2014, Texas Instruments Incorporated
Product Folder Links: LM3406 LM3406HV LM3406HV-Q1


Features Datasheet pdf LM3406, LM3406HV, LM3406HV-Q1 SNVS512E SEPTEMBER 2008 – REVISED MARCH 201 4 LM3406 1.5-A, Constant Current, Buck Regulator for Driving High Power LEDs 1 FEATURES •1 LM3406HV-Q1 – Automot ive Grade Device – AEC-Q100 Grade 1 Q ualified – Operating Ambient Temperat ure: –40°C to 125°C • Integrated 2.0A MOSFET • VIN Range 6V to 42V (LM 3406) • VIN Range 6V to 75V (LM3406HV ) • VIN Range 6V to 75V (LM3406HV-Q1) • True Average Output Current Contro l • 1.7A Minimum Output Current Limit Over Temperature • Cycle-by-Cycle Cu rrent Limit • PWM Dimming with Dedica ted Logic Input • PWM Dimming with Po wer Input Voltage • Simple Control Lo op Compensation • Low Power Shutdown • Supports All-Ceramic Output Capacit ors and Capacitor-less Outputs • Ther mal Shutdown Protection • TSSOP-14 Pa ckage 3 DESCRIPTION The LM3406 family are monolithic switching regulators des igned to deliver constant currents to h igh power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-si.
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