Using the LM3643EVM Evaluation Module
User's Guide
Literature Number: SNVU399
August 2014
Contents
1
2
3
4
5
2
Introduction ......................................................................................................................... 4
Setup .................................................................................................................................. 4
2.1
Input/Output Connector Description ................................................................................... 4
2.2
Setup ....................................................................................................................... 6
2.3
Operation .................................................................................................................. 6
Board Layout ....................................................................................................................... 7
Schematic ......................................................................................................................... 10
USB Interface Board and I2C-Compatible Interface Program .................................................... 12
5.1
User Interface ........................................................................................................... 13
5.2
Flags...................................................................................................................... 14
5.3
I/O Pin Controls ......................................................................................................... 14
Table of Contents
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List of Figures
1
Enable Jumper Settings..................................................................................................... 4
2
VIO Jumper Settings ........................................................................................................ 4
3
STROBE Jumper Settings .................................................................................................. 5
4
TORCH/TEMP Jumper Settings ........................................................................................... 5
5
TX Jumper Settings
6
7
8
9
10
11
12
13
14
15
16
......................................................................................................... 5
Jumper Configuration ....................................................................................................... 7
Top Assembly Layer......................................................................................................... 8
Middle Layer 1 Routing ..................................................................................................... 8
Middle Layer 2 Routing ..................................................................................................... 9
Bottom Assembly Layer (UNMIRRORED) ............................................................................... 9
LM3643EVM Schematic ................................................................................................... 10
LM3643 General User Interface .......................................................................................... 12
I2C interface Fields ......................................................................................................... 13
Write Buttons................................................................................................................ 13
Flags ......................................................................................................................... 14
I/O Pin Controls ............................................................................................................. 14
List of Tables
1
Device and Package Configurations ...................................................................................... 4
2
Bill of Materials
.............................................................................................................
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List of Figures
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3
User's Guide
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LM3643EVM User's Guide
1
Introduction
The Texas Instruments LM3643EVM evaluation module (EVM) helps designers evaluate the operation
and performance of the LM3643 High-Current LED driver. The device offers configurability via I2Ccompatible interface. It can be enabled in Flash or Torch mode via the I2C interface or externally using the
STROBE and TORCH/TEMP pins. The module utilizes two LEDs (D1 & D2) mounted on the EVM.
The EVM contains one Synchronous Boost LED Flash Driver (See Table 1).
Table 1. Device and Package Configurations
2
FLASH LED DRIVER
IC
PACKAGE
U1
LM3643
0.4 mm-pitch, 12-Bump DSBGA
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the LM3643EVM.
2.1
Input/Output Connector Description
Input / GND - These are the power input terminals for the driver. The terminal block provides a power
(VIN) and ground (GND) connection to allow the user to attach the EVM to a cable harness.
EN (J12) - This is the jumper used to enable the LED driver (HWEN pin). The driver will be enabled when
the HWEN pin is high (VIO) and disabled when it is low (GND).
Figure 1. Enable Jumper Settings
VIO (J16) - This pin provides power for the I2C lines (Clock & Data) and for the HWEN pin. It is
recommended that this pin is connected to the VIN pin. If desired, it can be connected to the 3.3V line
provided by the USB interface connector. In this configuration, communication via the I2C interface may
not be possible if the supply voltage to the LED driver is below approximately 3 V.
Figure 2. VIO Jumper Settings
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Setup
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D1-CON (J14 pin3 and pin4) and D2-CON (J14 pin1 and pin2) are the jumpers used to connect the onboard flash LEDs to the LED output of the driver.
STROBE (J9) - This pin provides an external method for initiating a flash event. The STROBE pin is
connected to ground via a 300-kΩ resistor internal to the LM3643. To externally drive this pin, either
connect a control signal directly to the STROBE pin of the connector or place a jumper between connector
pins STROBE and PWM0. Pin PWM0 can be configured as a time-adjustable voltage pulse via the
General User Interface (GUI) software provided.
Figure 3. STROBE Jumper Settings
TORCH/TEMP
TORCH/TEMP
TORCH/TEMP (J21) - This pin provides an external method for initiating a torch event. The
TORCH/TEMP pin is connected to ground via a 300-kΩ resistor internal to the LM3643 as well as an
externally connected NTC thermistor. To externally drive this pin, either connect a control signal directly to
the TORCH/TEMP pin of the connector or place a jumper between connector pins TORCH/TEMP and
PWM1. Pin PWM1 can be configured as ON or OFFvia the GUI software provided. Removing the jumper,
and setting the TORCH/TEMP pin to TEMP mode, the TEMP function can be utilized via the externally
connected NTC thermistor.
Figure 4. TORCH/TEMP Jumper Settings
TX (J11) - This pin is used to initiate a TX-interrupt event. The TX pin is connected to ground via a 300-kΩ
resistor internal to the LM3643. To externally drive this pin, either connect a control signal directly to the
TX pin of the connector or place a jumper between connector pins TX and PWM2. Pin PWM2 can be
configured as to provide continuous voltage pulses via the GUI software provided.
Figure 5. TX Jumper Settings
SDA / SCL (J19) - These connections allow the user to externally control the I2C lines. For independent
control of the I2C lines, do not connect the VIO jumper to either the 3.3 V or the VIN pin.
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Setup
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OUT, LED1, LED2, TORCH/TEMP (J13, J10, J22) - These provide access to the regulated output of the
driver, the outputs of the LED current sources, and the TEMP pin. The user can measure VOUT with
reference to GND, VLED with reference to GND, current source headroom directly between VOUT and
VLED, and can monitor or control TORCH/TEMP input.
VINL/VIN (J7) - The user can monitor the Inductor Current and Input Current waveforms by omitting this
jumper and using separate wires from the power supply to the VINL and VIN pins. This will remove the
Input Capacitors from the Inductor and eliminate their filtering effect to the Inductor Current.
J17 and J18: LED Current measurements -The LM3643EVM provides a way to accurately measure the
LED current through both LEDs on board. Resistors R1 & R2 (0.1 Ω) are placed between the cathode of
LED1 & LED2, respectively, and Ground. The user can first measure the resistor values accurately, by
applying a known current through connector DxF and Ground and measuring the voltage between DxS
and GNDS. Then, during normal flash or torch operation, the voltage measured across the resistor divided
by the resistor value will equal the current through the resistor (and the LED).
2.2
Setup
The input voltage range for the flash driver is 2.5 volts to 5.5 volts. The on-board LEDs or an LED module
should be connected for proper operation.
2.3
Operation
For proper operation of the LM3643EVM, the jumpers should be properly configured. The recommended
setting, using shorting blocks is:
VIO to VIN
EN to VIO
STROBE to PWM0 or external signal
TORCH/TEMP to PWM1 or external signal
TX to PWM2 or external signal
LEDs (J14) shorted
In this configuration, the device will power up when power is applied.
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Board Layout
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Figure 6. Jumper Configuration
3
Board Layout
Figure 7, Figure 8, Figure 9 and Figure 10 show the board layout for the LM3643EVM. The EVM offers
resistors, capacitors, and jumpers to enable the device and to configure it as desired.
The LM3643 will dissipate power, especially during high current and long duration flash events. Power will
also be dissipated on the flash LEDs. The EVM layout is designed to minimize temperature rise during
operation. It is recommended that in order to prevent overheating, repeated flash events in very short time
intervals is avoided.
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Board Layout
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Figure 7. Top Assembly Layer
Figure 8. Middle Layer 1 Routing
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Board Layout
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Figure 9. Middle Layer 2 Routing
Figure 10. Bottom Assembly Layer (UNMIRRORED)
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Schematic
4
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Schematic
GND
J1
GND
J3
J2
PWM0
J4
3.3V
1
2
VINL
1
2
3
J6
1
2
3
J5
PWM2
SCL
1
3
5
7
9
PWM1
2
4
6
8
10
SDA
GND
N2510-6002-RB
GND
L1
SW
1
2
2
1
DFE201610P-1R0M
J7
R1
0
VIN1
J8
U1
B1
A1
VIN
SW
IN
C1
10µF
GND
STROBE
OUT
2
1
C1
C4
10µF
J10
C5
10µF
D1
D3
GND
LED2
PWM1
A2
C2
10µF
B2
C3
100µF
CBATT
J9
STROBE
1
2
3
SH-STROBE1
STROBE
GND
VOUT
TX
D2
GND
LED2
J11
HWEN
PWM2
C2
TX
LED1
SCL
1
2
3
SH-TX1
B3
TX
EN
GND
DCON
J14
SDA
2
1
J13
SH-D1
1
2
3
4
LED1
TORCH/TEMP
A3
R2
GND
VIN
1
2
3
1
1
SH-EN1
EN
R3
1.0k
SH-D2
J17
3
2
1
R6
0.1
TORCH/TEMP
t°
2
2
D1
Ultra White
J18
3
2
1
1
2
3
1.0k
LM3643YFF
D2
Ultra White
R5
0.1
J12
VIO
C3
TH1
100k ohm
3.3V
R4
49.9k
J16
SH-VIO1
VIO
J19
GND
VIO
SCL
1
2
3
4
SDA
GND
I2C
GND
J21
PWM0
1
GND
1
2
3
SH-TORCH1
PWMJ22
GND
Figure 11. LM3643EVM Schematic
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Schematic
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Table 2. Bill of Materials
DESIGNATOR
DESCRIPTION
MANUFACTURER
PART NUMBER
QUANTITY
!PCB1
Printed Circuit Board
Any
SV601027
1
C1, C2, C4, C5
CAP, CERM, 10uF, 6.3V, +/-20%, X5R, 0402
Samsung
CL05A106MQ5NUNC
4
C3
CAP, CERM, 100uF, 6.3V, +/-20%, X5R, 1206
MuRata
GRM31CR60J107ME39L
1
D1, D2
LED, Ultra White, SMD
OSRAM
LUW CAEP.G4
2
J1, J7, J8, J10, J13
Header, TH, 100mil, 2x1, Gold plated, 230 mil above insulator
Samtec, Inc.
TSW-102-07-G-S
5
J2
Header (shrouded), 100mil, 5x2, High-Temperature, Gold, TH
3M
N2510-6002-RB
1
J3, J4, J9, J11, J12, J16, J17, J18,
J21
Header, TH, 100mil, 3x1, Gold plated, 230 mil above insulator
Samtec, Inc.
TSW-103-07-G-S
9
J5
Standard Banana Jack, Insulated, Black
Keystone
6092
1
J6
Standard Banana Jack, Insulated, Red
Keystone
6091
1
J14, J19
Header, TH, 100mil, 4x1, Gold plated, 230 mil above insulator
Samtec, Inc.
TSW-104-07-G-S
2
J22
Header, TH, 100mil, 1pos, Gold plated, 230 mil above insulator
Samtec, Inc.
TSW-101-07-G-S
1
L1
Inductor, Shielded, Metal Composite, 1uH, 2.6A, 0.058 ohm, SMD
Toko
DFE201610P-1R0M
1
LBL1
Thermal Transfer Printable Labels, 0.650" W x 0.200" H - 10,000 per roll
Brady
THT-14-423-10
1
R1
RES, 0 ohm, 5%, 0.25W, 1206
Yageo America
RC1206JR-070RL
1
R2, R3
RES, 1.0k ohm, 5%, 0.1W, 0603
Vishay-Dale
CRCW06031K00JNEA
2
R4
RES, 49.9k ohm, 1%, 0.063W, 0402
Vishay-Dale
CRCW040249K9FKED
1
R5, R6
RES, 0.1 ohm, 5%, 0.125W, 0805
Panasonic
ERJ-6RSJR10V
2
SH-D1, SH-D2, SH-EN1, SHSTROBE1, SH-TORCH1, SH-TX1,
SH-VIO1
Shunt, 100mil, Gold plated, Black
3M
969102-0000-DA
7
TH1
Thermistor NTC, 100k ohm, 5%, 0402
MuRata
NCP15WF104J03RC
1
U1
IC LED DRVR PHOTO FLASH Dual 1.5A SMD, YFF0012AEAD
Texas Instruments
LM3643YFF
1
VIN1
Test Point, TH, Compact, Red
Keystone
5005
1
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USB Interface Board and I2C-Compatible Interface Program
5
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USB Interface Board and I2C-Compatible Interface Program
Texas Instruments has created an I2C-compatible program and USB docking board (USB2ANY) that can
help exercise the part in a simple way. Contained in this document is a description of how to use the
USB2ANY interface box and interface software.
The LM3643EVM has the means to “plug into” the USB docking board. The USB docking board provides
all the control signals for the simple interface. Power to the part must be provided externally. A USB cable
(provided) must be connected to the board from a PC.
The I2C-compatible interface program provides all of the control that the LM3643 part requires. For proper
operation, the USB docking board should be plugged into the PC before the interface program is opened.
Once connected, and the program is executed, a basic interface window will open. The image below
shows the default settings.
Figure 12. LM3643 General User Interface
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USB Interface Board and I2C-Compatible Interface Program
The “I2C Interface” fields may be used to write or read any LM3643 register. Selecting the "Set Default
Settings" button resets all registers to their default values and updates all GUI fields.
Figure 13. I2C interface Fields
5.1
User Interface
the LM3643 GUI provides the user with access to all of the registers found on the device. Through a
combination of buttons, drop-down boxes and sliders, the user can configure the LM3643 to perform in the
desired mode. Please note that no data is written to the device until the Write button found within the
corresponding register is pressed.
Figure 14. Write Buttons
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USB Interface Board and I2C-Compatible Interface Program
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Flags
The contents of the LM3643 fault registers are read upon clicking the “Read Flags” button. The registers
are cleared upon read back.
Figure 15. Flags
5.3
I/O Pin Controls
The LM3643EVM provides the user with the capability to control the TORCH, STROBE and TX inputs
without the need of an external supply. The Tx Enable Button creates a continuous pulse train when
depressed. The Torch EN button toggles the LM3643's TORCH/TEMP pin high when pressed and low
depressed. The Ext. Strobe Button toggles the Strobe pin high for the duration entered in the field next to
the button.
The IR Strobe Button along with the period and width fields generate a continuous pulse train that can be
used to generate a current pulse pattern on the enabled LEDs.
Figure 16. I/O Pin Controls
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EVALUATION MODULES
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expressly acknowledges, represents, and agrees, and takes sole responsibility and risk with respect to, the following:
1.
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Texas Instruments Incorporated (TI) evaluation boards, kits, and/or modules (EVMs) and/or accompanying hardware that is marketed, sold,
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General Statement for EVMs Not Including a Radio
For EVMs not including a radio and not subject to the U.S. Federal Communications Commission (FCC) or Industry Canada (IC)
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products typically fit for general consumer use. EVMs may nonetheless generate, use, or radiate radio frequency energy, but have not been
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General Statement for EVMs including a radio
User Power/Frequency Use Obligations: For EVMs including a radio, the radio included in such EVMs is intended for development and/or
professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability in such EVMs
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U.S. Federal Communications Commission Compliance
For EVMs Annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant
Caution
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications could void the user's authority to operate the equipment.
FCC Interference Statement for Class A EVM devices
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial
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FCC Interference Statement for Class B EVM devices
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Industry Canada Compliance (English)
For EVMs Annotated as IC – INDUSTRY CANADA Compliant:
This Class A or B digital apparatus complies with Canadian ICES-003.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the
equipment.
Concerning EVMs Including Radio Transmitters
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this
device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired
operation of the device.
Concerning EVMs Including Detachable Antennas
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain
approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should
be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.
This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum
permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain
greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.
Canada Industry Canada Compliance (French)
Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada
Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de
l'utilisateur pour actionner l'équipement.
Concernant les EVMs avec appareils radio
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est
autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout
brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
Concernant les EVMs avec antennes détachables
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain
maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à
l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente
(p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante.
Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel
d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans
cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2014, Texas Instruments Incorporated
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Important Notice for Users of EVMs Considered “Radio Frequency Products” in Japan
EVMs entering Japan are NOT certified by TI as conforming to Technical Regulations of Radio Law of Japan.
If user uses EVMs in Japan, user is required by Radio Law of Japan to follow the instructions below with respect to EVMs:
1.
2.
3.
Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and
Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of
Japan,
Use EVMs only after user obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to EVMs, or
Use of EVMs only after user obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect
to EVMs. Also, do not transfer EVMs, unless user gives the same notice above to the transferee. Please note that if user does not
follow the instructions above, user will be subject to penalties of Radio Law of Japan.
http://www.tij.co.jp
【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 本開発キットは技術基準適合証明を受けておりません。 本製品の
ご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。
1.
2.
3.
電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用いただく。
実験局の免許を取得後ご使用いただく。
技術基準適合証明を取得後ご使用いただく。。
なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします
上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。
日本テキサス・インスツルメンツ株式会社
東京都新宿区西新宿６丁目２４番１号
西新宿三井ビル
http://www.tij.co.jp
Texas Instruments Japan Limited
(address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan
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