Sample &
Buy
Product
Folder
Support &
Community
Tools &
Software
Technical
Documents
Reference
Design
LM3414, LM3414HV
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
LM3414/HV 1-A, 60-W Common Anode-Capable Constant Current Buck LED Driver
Requires No External Current Sensing Resistor
1 Features
•
1
•
•
•
•
•
•
•
•
•
•
•
3 Description
(1)
Supports LED Power up to 60 W : 18x 3-W
HBLEDs
Requires No External Current Sensing Resistor
±3% LED Current Accuracy
Up to 96% Efficiency
High Contrast Ratio (Minimum Dimming Current
Pulse Width 0.
D1
LM3414 / LM3414HV
CVCC
VCC
R1
PGND
IADJ
GND
GND
Q1
Analog
temperature
sensor
GND
VIN
U1
GND
CIN
GND
LX
PWM
dimming signal
DIM
FS
* DAP connect to GND
R2
L1
High power LED Array
Vin
VCC
RFS
GND
RIADJ
GND
Figure 19. Application Circuit of LM3414/HV With Temperature Fold-Back Circuitry and PWM Dimming
14
Submit Documentation Feedback
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
LM3414, LM3414HV
www.ti.com
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
Feature Description (continued)
7.3.6 Internal VCC Regulator
The LM3414/HV features a 5.4-V internal voltage regulator that connects between the VIN and VCC pins for
powering internal circuitry and provide biases to external components. The VCC pin must be bypassed to the
GND pin with a 1-µF ceramic capacitor, CVCC that connected to the pins as close as possible. When the input
voltage falls to less than 6 V, the VCC voltage will drop to less than 5.4 V and decrease proportionally as Vin
decreases. The device will shutdown as the VCC voltage falls to less than 3.9 V. When the internal regulator is
used to provide bias to external circuitry, it is essential to ensure the current sinks from VCC pin does not exceed
2 mA to maintain correct voltage regulation.
7.4 Device Functional Modes
There are no additional functional modes for this device.
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
Submit Documentation Feedback
15
LM3414, LM3414HV
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
www.ti.com
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
8.1.1 Setting the Switching Frequency
Both the LM3414 and LM3414HV are PWM LED drivers that contain a clock generator to generate constant
switching frequency for the device. The switching frequency is determined by the resistance of an external
resistor RFS in the range of 250 kHz to 1 MHz. Lower resistance of RFS results in higher switching frequency. The
switching frequency of the LM3414/HV is governed using Equation 5.
fSW =
20 x 106
kHz
RFS
(5)
1000
ƒSW (kHz)
800
600
400
200
20
40
RFS (kΩ)
60
80
Figure 20. Switching Frequency vs RFS
Table 1. Examples for fSW Settings
fSW (kHz)
RFS (kΩ)
250
80
500
40
1000
20
To ensure accurate current regulation, the LM3414/HV should be operated in continuous conduction mode
(CCM) and the ON time should not be shorter than 400 ns under all operation condition.
8.1.2 Setting LED Current
The LM3414/HV requires no external current sensing resistor for LED current regulation. The average output
current of the LM3414/HV is adjustable by varying the resistance of the resistor, RIADJ that connects across the
IADJ and GND pins. The IADJ pin is internally biased to 1.255 V. The LED current is then governed by
Equation 6.
ILED =
3125 x 103
mA
RIADJ
where
•
16
350 mA < ILED < 1A
Submit Documentation Feedback
(6)
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
LM3414, LM3414HV
www.ti.com
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
1.4
1.2
ILED(A)
1.0
0.8
0.6
0.4
0.2
0.0
0
1
2
3 4 5 6
RIADJ(k )
7
8
9
Figure 21. LED Current vs RIADJ
Table 2. Examples for IOUT Settings
IOUT (mA)
RIADJ (kΩ)
350
8.93
500
6.25
700
4.46
1000
3.13
The LED current can be set to any level in the range from 350 mA to 1A. To provide accurate LED current, RIADJ
should be a resistor with no more than 0.5% tolerance. If the IADJ pin is accidentally shorted to GND (RIADJ = 0),
the output current is limited to avoid damaging the circuit. When the overcurrent protection is activated, current
regulation cannot be maintained until the overcurrent condition is cleared.
8.1.3 Inductor Selection
To ensure proper output current regulation, the LM3414/HV must operate in Continuous Conduction Mode
(CCM). With the incorporation of PLM, the peak-to-peak inductor current ripple can be set as high as ±60% of
the defined average output current. The minimum inductance of the inductor is decided by the defined average
LED current and allowable inductor current ripple. The minimum inductance can be found by the equations
shown in Equation 7 through Equation 8.
Because:
'IL =
VIN - VLED
xDxT
L
(7)
Thus:
LMIN =
VIN -VLED VLED 1
x
x
1.2 x ILED VIN fSW
(8)
The LM3414/HV can maintain LED current regulation without output filter capacitor. This is because the inductor
of the floating buck structure provides continuous current to the LED throughout the entire switching cycle. When
LEDs are driven without filter capacitor, the LED peak current must not set exceeding the rated current of the
LED. The peak LED current is governed by Equation 9.
'IL =
(VIN -VLED) VLED
+ ILED(AVG)
2L x VIN x fSW
(9)
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
Submit Documentation Feedback
17
LM3414, LM3414HV
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
www.ti.com
8.2 Typical Applications
8.2.1 LM3414/HV Design Example
Vin
High power LED Array
D1
LM3414/14HV
CVCC
VCC
VIN
PGND
4.5V ± 42 VDC (LM3414)
Iout = 1A
CIN
4.5V ± 65 VDC (LM3414HV)
GND
L1
LX
IADJ
DIM
GND
FS
PWM dimming signal
GND
RIADJ
* DAP connect to GND
RFS
GND
GND
Figure 22. LM3414/HV Design Example Schematic
8.2.1.1 Design Requirements
• Input Voltage: VIN
• LED String Voltage: VLED
• LED Current: ILED
• Switching Frequency: fSW
• Maximum LED Current Ripple: ΔiL-PP
• Maximum Input Voltage Ripple: ΔVIN
8.2.1.2 Detailed Design Procedure
8.2.1.2.1 Calculate Operating Parameters
To calculate component values the operating duty cycle (D) must be calculated using Equation 10.
D=
VLED
VIN
(10)
8.2.1.2.2 Calculate RIADJ
To get the desired LED current calculate the value for RIADJ using Equation 11.
RIADJ =
3125
ILED
(11)
8.2.1.2.3 Calculate RFS
Calculate the value of RFS for the desired switching frequency using Equation 12.
RFS =
18
20 × 109
fSW
Submit Documentation Feedback
(12)
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
LM3414, LM3414HV
www.ti.com
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
Typical Applications (continued)
8.2.1.2.4 Calculate LMIN
Calculate the minimum inductor value required for the desired LED current ripple using Equation 13.
LMIN =
:VIN - VLED; × VLED
fSW × VIN × ¨iL-PP
(13)
8.2.1.2.5 Calculate CIN-MIN
Calculate the minimum input capacitor value for the desired input voltage ripple using Equation 14.
CIN-MIN =
D × :1 -D; × ILED
fSW × ¨VIN
(14)
8.2.2 LM3414/HV Design Example (IOUT = 1 A)
Vin
Iout = 1000 mA (nom.)
100V
2.2 PF
CIN
CVCC
16V 1 PF
LM3414 / LM3414HV
VCC
VIN
PGND
IADJ
100V
2A
LED x 6
D1
24V ± 42 VDC (LM3414)
24V - 65 VDC (LM3414HV)
GND
L1 47 PH
LX
U1
GND
DIM
FS
GND
RIADJ
3.24k
* DAP connect to GND
GND
RFS
40.2k
GND
Figure 23. LM3414/HV Design Example (IOUT = 1 A) Schematic
8.2.2.1 Design Requirements
• Input Voltage: VIN = 48 V ±10%
• LED String Voltage: VLED = 35 V
• LED Current: ILED = 1 A
• Switching Frequency: fSW = 500 kHz
• Maximum LED Current Ripple: ΔiL-PP ≤ 500 mA
• Maximum Input Voltage Ripple: ΔVIN ≤ 200 mV
8.2.2.2 Detailed Design Procedure
8.2.2.2.1 Calculate Operating Parameters
To calculate component values the operating duty cycle (D) for this application can be calculated be calculated
using Equation 15.
D=
VLED
35V
=
= 0.73
48V
VIN
(15)
8.2.2.2.2 Calculate RIADJ
For 1A LED current calculate the value for RIADJ using Equation 16.
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
Submit Documentation Feedback
19
LM3414, LM3414HV
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
www.ti.com
Typical Applications (continued)
RIADJ =
3125
3125
=
= 3.125k
ILED
1A
(16)
Choose a standard value of RIADJ = 3.24kΩ.
8.2.2.2.3 Calculate RFS
Calculate the value of RFS for 500-kHz switching frequency using Equation 17.
RFS
20 × 109
20 × 109
=
=
= 40k
fSW
500kHz
(17)
Choose a standard value of RFS = 40.2kΩ.
8.2.2.2.4 Calculate LMIN
Calculate the minimum inductor value required for 500 mA or less peak-to-peak LED current ripple using
Equation 18.
LMIN =
:VIN - VLED; × VLED
:48V - 35V; × 35V
=
500kHz × 35V × 500mA
fSW × VIN × ¨iL-PP
H
(18)
Choose a higher standard value of L = 47µH.
8.2.2.2.5 Calculate CIN-MIN
Calculate the minimum input capacitor value for 200 mV or less input voltage ripple using Equation 19.
CIN-MIN =
D × :1 -D; × ILED
0.73 × :1 - 0.73; × 1A
=
fSW × ¨VIN
500kHz × 200mV
F
(19)
Choose a higher standard value of CIN = 2.2µF.
Table 3. Bill of Materials
DESIGNATION
20
DESCRIPTION
PACKAGE
MANUFACTURE PART NO.
VENDOR
U1
LED Driver IC
LM3414 / LM3414HV
SOIC-8
LM3414 / LM3414HV
TI
L1
Inductor 47 µH
8 × 8 × 4.9 (mm)
MMD-08EZ-470M-SI
Mag.Layers
D1
Schottky Diode 100 V, 2 A
SMP
SS2PH10-M3
Vishay
CIN
Cap MLCC 100V 2.2 µF X7R
1210
GRM32ER72A225KA35L
Murata
CVCC
Cap MLCC 16V 1 µF X5R
603
GRM39X5R105K16D52K
Murata
RIADJ
Chip Resistor 3.24 kΩ 1%
603
CRCW06033241F
Vishay
RFS
Chip Resistor 40.2 kΩ 1%
603
CRCW06034022F
Vishay
Submit Documentation Feedback
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
LM3414, LM3414HV
www.ti.com
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
8.2.2.3 Application Curve
Figure 24. PWM Dimming Top = DIM. Bottom = LED Current.
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
Submit Documentation Feedback
21
LM3414, LM3414HV
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
www.ti.com
9 Power Supply Recommendations
Use any DC output power supply with a maximum voltage high enough for the application. The power supply
should have a minimum current limit of at least 1 A.
10 Layout
10.1 Layout Guidelines
Discontinuous currents are the most likely to generate EMI; therefore, take care when routing these paths. The
main path for discontinuous current in the LM3414/HV buck converter contains the input capacitor (CIN), the
recirculating diode (D1), and the switch node (LX). This loop should be kept as small as possible and the
connections between all three components should be short and thick to minimize parasitic inductance. In
particular, the switch node (where L1, D1 and LX connect) should be just large enough to connect the
components without excessive heating from the current it carries.
The IADJ, FS, and DIM pins are all high-impedance control inputs which couple external noise easily, therefore
the loops containing these high impedance nodes should be minimized. The frequency setting resistor (RFS) and
current setting resistor (RIADJ) should be placed close to the FS and IADJ pins as possible.
10.2 Layout Example
+
GND
VIN/LED+
CIN
VCC
VIN
D1
CVCC
LED-
RIADJ
LX
IADJ
DIM
GND
FS
L1
-
PGND
RFS
THERMAL/POWER VIA
Figure 25. Layout Recommendation
22
Submit Documentation Feedback
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
LM3414, LM3414HV
www.ti.com
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
11 Device and Documentation Support
11.1 Related Links
The table below lists quick access links. Categories include technical documents, support and community
resources, tools and software, and quick access to sample or buy.
Table 4. Related Links
PARTS
PRODUCT FOLDER
SAMPLE AND BUY
TECHNICAL
DOCUMENTS
TOOLS AND
SOFTWARE
SUPPORT AND
COMMUNITY
LM3414
Click here
Click here
Click here
Click here
Click here
LM3414HV
Click here
Click here
Click here
Click here
Click here
11.2 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
11.3 Trademarks
E2E is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
11.4 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.
11.5 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
12 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
Copyright © 2010–2015, Texas Instruments Incorporated
Product Folder Links: LM3414 LM3414HV
Submit Documentation Feedback
23
PACKAGE OPTION ADDENDUM
www.ti.com
20-Jan-2017
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
LM3414HVMR/NOPB
ACTIVE SO PowerPAD
DDA
8
95
Green (RoHS
& no Sb/Br)
CU SN
Level-3-260C-168 HR
-40 to 125
L3414
HVMR
LM3414HVMRX/NOPB
ACTIVE SO PowerPAD
DDA
8
2500
Green (RoHS
& no Sb/Br)
CU SN
Level-3-260C-168 HR
-40 to 125
L3414
HVMR
LM3414HVSD/NOPB
ACTIVE
WSON
NGQ
8
1000
Green (RoHS
& no Sb/Br)
CU SN
Level-1-260C-UNLIM
-40 to 125
L249B
LM3414HVSDX/NOPB
ACTIVE
WSON
NGQ
8
4500
Green (RoHS
& no Sb/Br)
CU SN
Level-1-260C-UNLIM
-40 to 125
L249B
LM3414MR/NOPB
ACTIVE SO PowerPAD
DDA
8
95
Green (RoHS
& no Sb/Br)
CU SN
Level-3-260C-168 HR
-40 to 125
L3414
MR
LM3414MRX/NOPB
ACTIVE SO PowerPAD
DDA
8
2500
Green (RoHS
& no Sb/Br)
CU SN
Level-3-260C-168 HR
-40 to 125
L3414
MR
LM3414SD/NOPB
ACTIVE
WSON
NGQ
8
1000
Green (RoHS
& no Sb/Br)
CU SN
Level-1-260C-UNLIM
-40 to 125
L248B
LM3414SDX/NOPB
ACTIVE
WSON
NGQ
8
4500
Green (RoHS
& no Sb/Br)
CU SN
Level-1-260C-UNLIM
-40 to 125
L248B
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
(4)
20-Jan-2017
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
26-Jun-2015
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
LM3414HVMRX/NOPB
SO
Power
PAD
DDA
8
2500
330.0
12.4
6.5
5.4
2.0
8.0
12.0
Q1
LM3414HVSD/NOPB
WSON
NGQ
8
1000
178.0
12.4
3.3
3.3
1.0
8.0
12.0
Q1
LM3414HVSDX/NOPB
WSON
NGQ
8
4500
330.0
12.4
3.3
3.3
1.0
8.0
12.0
Q1
LM3414MRX/NOPB
SO
Power
PAD
DDA
8
2500
330.0
12.4
6.5
5.4
2.0
8.0
12.0
Q1
LM3414SD/NOPB
WSON
NGQ
8
1000
178.0
12.4
3.3
3.3
1.0
8.0
12.0
Q1
LM3414SDX/NOPB
WSON
NGQ
8
4500
330.0
12.4
3.3
3.3
1.0
8.0
12.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
26-Jun-2015
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
LM3414HVMRX/NOPB
LM3414HVSD/NOPB
SO PowerPAD
DDA
8
2500
367.0
367.0
35.0
WSON
NGQ
8
1000
210.0
185.0
35.0
LM3414HVSDX/NOPB
WSON
NGQ
8
4500
367.0
367.0
35.0
LM3414MRX/NOPB
SO PowerPAD
DDA
8
2500
367.0
367.0
35.0
LM3414SD/NOPB
WSON
NGQ
8
1000
210.0
185.0
35.0
LM3414SDX/NOPB
WSON
NGQ
8
4500
367.0
367.0
35.0
Pack Materials-Page 2
PACKAGE OUTLINE
DDA0008A
PowerPAD TM SOIC - 1.7 mm max height
SCALE 2.400
PLASTIC SMALL OUTLINE
C
6.2
TYP
5.8
SEATING PLANE
PIN 1 ID
AREA
A
0.1 C
6X 1.27
8
1
2X
3.81
5.0
4.8
NOTE 3
4
5
B
8X
4.0
3.8
NOTE 4
0.51
0.31
0.25
1.7 MAX
C A B
0.25
TYP
0.10
SEE DETAIL A
5
4
EXPOSED
THERMAL PAD
0.25
GAGE PLANE
2.34
2.24
8
1
0 -8
0.15
0.00
1.27
0.40
DETAIL A
2.34
2.24
TYPICAL
4218825/A 05/2016
PowerPAD is a trademark of Texas Instruments.
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not
exceed 0.15 mm per side.
4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.25 mm per side.
5. Reference JEDEC registration MS-012.
www.ti.com
EXAMPLE BOARD LAYOUT
DDA0008A
PowerPAD TM SOIC - 1.7 mm max height
PLASTIC SMALL OUTLINE
(2.95)
NOTE 9
SOLDER MASK
DEFINED PAD
(2.34)
SOLDER MASK
OPENING
8X (1.55)
SEE DETAILS
1
8
8X (0.6)
SYMM
(1.3)
TYP
(2.34)
SOLDER MASK
OPENING
(4.9)
NOTE 9
6X (1.27)
5
4
(R0.05) TYP
METAL COVERED
BY SOLDER MASK
SYMM
( 0.2) TYP
VIA
(1.3) TYP
(5.4)
LAND PATTERN EXAMPLE
SCALE:10X
0.07 MIN
ALL AROUND
0.07 MAX
ALL AROUND
SOLDER MASK
OPENING
METAL
SOLDER MASK
OPENING
METAL UNDER
SOLDER MASK
SOLDER MASK
DEFINED
NON SOLDER MASK
DEFINED
SOLDER MASK DETAILS
4218825/A 05/2016
NOTES: (continued)
6. Publication IPC-7351 may have alternate designs.
7. Solder mask tolerances between and around signal pads can vary based on board fabrication site.
8. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature
numbers SLMA002 (www.ti.com/lit/slma002) and SLMA004 (www.ti.com/lit/slma004).
9. Size of metal pad may vary due to creepage requirement.
10. Vias are optional depending on application, refer to device data sheet. If any vias are implemented, refer to their locations shown
on this view. It is recommended that vias under paste be filled, plugged or tented.
www.ti.com
EXAMPLE STENCIL DESIGN
DDA0008A
PowerPAD TM SOIC - 1.7 mm max height
PLASTIC SMALL OUTLINE
(2.34)
BASED ON
0.125 THICK
STENCIL
8X (1.55)
(R0.05) TYP
1
8
8X (0.6)
(2.34)
BASED ON
0.125 THICK
STENCIL
SYMM
6X (1.27)
5
4
METAL COVERED
BY SOLDER MASK
SYMM
(5.4)
SEE TABLE FOR
DIFFERENT OPENINGS
FOR OTHER STENCIL
THICKNESSES
SOLDER PASTE EXAMPLE
EXPOSED PAD
100% PRINTED SOLDER COVERAGE BY AREA
SCALE:10X
STENCIL
THICKNESS
SOLDER STENCIL
OPENING
0.1
0.125
0.150
0.175
2.62 X 2.62
2.34 X 2.34 (SHOWN)
2.14 X 2.14
1.98 X 1.98
4218825/A 05/2016
NOTES: (continued)
11. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
12. Board assembly site may have different recommendations for stencil design.
www.ti.com
PACKAGE OUTLINE
NGQ0008A
WSON - 0.8 mm max height
SCALE 4.000
PLASTIC SMALL OUTLINE - NO LEAD
3.1
2.9
B
A
PIN 1 INDEX AREA
3.1
2.9
C
0.8
0.7
SEATING PLANE
0.08 C
1.6 0.1
(0.1) TYP
SYMM
EXPOSED
THERMAL PAD
0.05
0.00
4
5
SYMM
9
2X
1.5
2 0.1
8
1
6X 0.5
8X
PIN 1 ID
8X
0.5
0.3
0.3
0.2
0.1
0.05
C A B
C
4214922/A 03/2018
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. The package thermal pad must be soldered to the printed circuit board for thermal and mechanical performance.
www.ti.com
EXAMPLE BOARD LAYOUT
NGQ0008A
WSON - 0.8 mm max height
PLASTIC SMALL OUTLINE - NO LEAD
(1.6)
SYMM
8X (0.6)
1
8
(0.75)
8X (0.25)
9
SYMM
(2)
6X (0.5)
5
4
(R0.05) TYP
( 0.2) VIA
TYP
(2.8)
LAND PATTERN EXAMPLE
EXPOSED METAL SHOWN
SCALE:20X
0.07 MIN
ALL AROUND
0.07 MAX
ALL AROUND
EXPOSED METAL
EXPOSED METAL
SOLDER MASK
OPENING
METAL
METAL UNDER
SOLDER MASK
NON SOLDER MASK
DEFINED
(PREFERRED)
SOLDER MASK
OPENING
SOLDER MASK
DEFINED
SOLDER MASK DETAILS
4214922/A 03/2018
NOTES: (continued)
4. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature
number SLUA271 (www.ti.com/lit/slua271).
5. Vias are optional depending on application, refer to device data sheet. If any vias are implemented, refer to their locations shown
on this view. It is recommended that vias under paste be filled, plugged or tented.
www.ti.com
EXAMPLE STENCIL DESIGN
NGQ0008A
WSON - 0.8 mm max height
PLASTIC SMALL OUTLINE - NO LEAD
8X (0.6)
SYMM
9
METAL
TYP
8
1
8X (0.25)
SYMM
(1.79)
6X (0.5)
5
4
(R0.05) TYP
(1.47)
(2.8)
SOLDER PASTE EXAMPLE
BASED ON 0.1 mm THICK STENCIL
EXPOSED PAD 9:
82% PRINTED SOLDER COVERAGE BY AREA UNDER PACKAGE
SCALE:20X
4214922/A 03/2018
NOTES: (continued)
6. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
www.ti.com
IMPORTANT NOTICE AND DISCLAIMER
TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE
DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”
AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD
PARTY INTELLECTUAL PROPERTY RIGHTS.
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate
TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable
standards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants you
permission to use these resources only for development of an application that uses the TI products described in the resource. Other
reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third
party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims,
damages, costs, losses, and liabilities arising out of your use of these resources.
TI’s products are provided subject to TI’s Terms of Sale (www.ti.com/legal/termsofsale.html) or other applicable terms available either on
ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable
warranties or warranty disclaimers for TI products.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2019, Texas Instruments Incorporated