Texas Instruments LM3639A Manual de usuario

Using the LM3639A Evaluation Module

User's Guide

Literature Number: SNVU211

March 2013

GND

VIO

GND

VIO

User's Guide

SNVU211–March 2013

LM3639AYFQEVM User's Guide

1 Introduction

The Texas Instruments LM3639YFQAEVM evaluation module (EVM) helps designers evaluate the

operation and performance of the LM3639A Single Chip 40V Backlight + 1.5A Flash LED Driver. The low-

voltage, high-current flash LED driver is a synchronous boost which provides the power for a single flash

LED at up to 1.5A or dual LEDs at up to 750 mA each. The high-voltage backlight driver is a dual-output

asynchronous boost which powers dual LED strings at up to 40V and 30 mA per string.

The EVM contains one LM3639A Single Chip 40V Backlight + 1.5A Flash LED Driver (See Table 1).

Table 1. Device and Package Configurations

FLASH LED DRIVER IC PACKAGE

U1 LM3639AYFQT YFQ0020HGA

2 Setup

This section describes the jumpers and connectors on the EVM as well as how to properly connect, set up

and use the LM3639A EVM.

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-This is the jumper used to enable the LED driver. The driver will be enabled when the EN pin is high

(VIO) and disabled when it is low (GND). The EN pin is connected to ground via a 300 kΩresistor internal

to the LM3639A

Figure 1. Enable Jumper Settings

VIO - This pin provides power for the I2C lines (Clock & Data) and for the EN 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 3V.

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GND

PWM1

GND

PWM1

GND

STROBE

PWM2

GND

STROBE

PWM2

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Setup

Figure 2. VIO Jumper Settings

J3 - LEDB CON - is the jumper used to connect the on-board backlight LEDs to the LED output of the

driver.

J20 and J21 - D1B and D2B LEDs - are the jumper used to select the number of LEDs in each backlight

string.

J11 and J12 - D1F CON and D2F CON- are the jumpers used to connect the on-board flash LEDs to the

LED output of the driver.

J27 - STROBE - This pin provides an external method for initiating a flash event. The STROBE pin is

connected to ground via a 300 kΩresistor internal to the LM3639A. 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 PWM2 can be configured as time-adjustable voltage pulse via the General

User Interface software provided.

Figure 3. STROBE Jumper Settings

J25-TX-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 LM3639A. 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 PWM1. Pin PWM1 can be

configured as continuous voltage pulses via the General User Interface software provided.

Figure 4. TX Jumper Settings

J22 - PWM- This pin provides an external method for adjusting the backlight LED brightness. The PWM

pin is connected to ground via a 300 kΩresistor internal to the LM3639A. To externally drive this pin,

either connect a control signal directly to the PWM pin of the connector or place a jumper between

connector pins PWM and PWM0. Pin PWM0 can be configured to provide a continuous stream of voltage

pulses of adjustable frequency and duty cycle via the General User Interface software provided.

SNVU211–March 2013 LM3639AYFQEVM User's Guide

GND

PWM

PWM0

GND

PWM

PWM0

Board Layout

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Figure 5. PWM Jumper Settings

J29 - SDA / SCL - 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 3.3V or the VIN pin.

2.2 Setup

The input voltage range for the flash driver is 2.7 volts to 5.5 volts. The on-board LEDs should be

connected for proper operation.

2.3 Operation

For proper operation of the LM3639A, the jumpers should be properly configured. The recommended

setting, using shorting blocks is:

VIO to VIN

EN to VIO

STROBE to PWM2 or external signal

PWM to PWM0 or external signal

TX to PWM1 or external signal

LEDs (J11, J12, J13, J20, J21) shorted

In this configuration, the device will power up when power is applied.

USB2ANY ribbon cable inserted into J19

3 Board Layout

Figure 6,Figure 9,Figure 7 and Figure 8 show the board layout for the LM3639A EVM. The EVM offers

resistors, capacitors and jumpers to Enable the device and to configure it as desired.

The LM3639A 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

Figure 6. Top Assembly Layer

Figure 7. Middle Layer 1 Routing

SNVU211–March 2013 LM3639AYFQEVM User's Guide

Board Layout

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Figure 8. Middle Layer 2 Routing

Figure 9. Bottom Assembly Layer (mirrored)

6LM3639AYFQEVM User's Guide SNVU211–March 2013

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SWB VOUTB

SWF

VOUTF

GND

D1F

D2F

D1B

D2B

OUTF1

OUTF2

SCL

OVPB

GNDF A4

GNDF B4

VIN C4

PWM D4

SWB E4

GNDB E3

SDA D3

STROBE C3

SWF2 B3

SW1F A3

LM3639

GND

SWF

VOUTBVOUTF

SWB

VIN

SCL

VINF

VINB

VIN

GND

J13

D1B

D2B

D1B D2B

D1F

D2F

PWM

SDA

STROBE

GND GND

J17

J18

J11

J12

D1F D2F

SDASCL

3.3V GND

GND

VINF

VINB

J10

J15

J22

PWM

J23

J25

J29

I2C

VIO

SCL

SDA

GND

PWM EN

TX 1

J27

STROBE

VIO

PWM2

GND GND

GND

J24

VIO

3.3V

VIO

VIN

VOUTF VOUTF

J16

GND

J26

L1B GND

J28

L2B

GND

6091

6092

J14

6091

1 2

3 4

5 6

7 8

9 10

J19

30310-6002HB

—+

D24

D22

D20

D18

D16

D14

D12

D10

D25

D23

D21

D19

D17

D15

D13

D11

1uH

PWM0 PWM1

PWM0

PWM1

PWM2

0.1

R3 0.1

3.01

R5 3.01

1.0k

R7 1.0k

VIO

SDA SCL

D2 D3

NSR0240V2T1G

GND

J30

GND

J31

GND

GNDGND

12 34 56 78 910 1112 1314 1516

J20

12 34 56 78 910 1112 1314 1516

J21

TP1 10 uF

C1 10 uF

10 uF

C4 10 uF

1 uF

C6 1 uF

—)

CBATT

LOGO

PCB

Texas Instruments

FID2

FID1 FID3

SV600873

PCB Number:

PCB Rev:

SH-J1

SH-J3SH-J2

SH-J4 SH-J5 SH-J6

SH-J7

SH-J8

SH-J9 SH-J10

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Schematic

4 Schematic

Figure 10. LM3639A EVM Schematic

Table 2. Bill of Materials

Item Desi Description Manufacturer Part Number Quantity

gnat

1 AA1 Printed Circuit Board TI 551600784-002 REVA 1

2 U1 IC, LM3639A Single Chip 40V Backlight + 1.5A TI LM3639AYFQT 1

Flash LED Driver

3 C1, CAP, CERM, 10uF, 6.3V, X5R 20%, 0402 Murata GRM155R60J106ME4 4

C2, 4D

C4,

4 C3 CAP, CERM, 100uF, 6.3V, +/-20%, X5R, 1206 Murata GRM188R60J106ME4 1

5 C6, CAP, CERM, 1F, 50V, X5R, 10%, 0603 TDK CGA4J3X7R1H105K 2

6 D1 Diode, Schottky, 40V, 250A, SOD523 ON Semiconductor NSR0240V2T1G 1

7 D2, LED,White SMT Philips Lumileds LXCL-EYW4 2

SNVU211–March 2013 LM3639AYFQEVM User's Guide

Schematic

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Table 2. Bill of Materials (continued)

Item Desi Description Manufacturer Part Number Quantity

gnat

8 D4, White LED, ROHM, 30mA, 0603 Rohm Semiconductor SML312WBCW1 22

D5,

D6,

D7,

D8,

D9,

D10,

D11,

D12,

D13,

D14,

D15,

D16,

D17,

D18,

D19,

D20,

D21,

D22,

D23,

D24,

D25

9 J1, Standard Banana Jack, Insulated, Red Keystone 6091 2

J14

10 J2, Header, TH, 100mil, 2x1, Gold plated, 230 mil Samtec, Inc. TSW-102-07-G-S 15

J3, above insulator

J4,

J5,

J7,

J8,

J9,

J10,

J11,

J12,

J13,

J15,

J16,

J17,

J18

11 J6 Standard Banana Jack, Insulated, Black Keystone 6092 1

12 J19 CONN HEADER 10POS DL STR GOLD 3M 30310-6002HB 1

13 J20, Header, TH, 100mil, 8x2, Gold plated, 230 mil Samtec, Inc. TSW-108-07-G-D 2

J21 above insulator

14 J22, Header, TH, 100mil, 3x1, Gold plated, 230 mil Samtec, Inc. TSW-103-07-G-S 9

J23, above insulator

J24,

J25,

J26,

J27,

J28,

J30,

J31

15 J29 Header, TH, 100mil, 4x1, Gold plated, 230 mil Samtec, Inc. TSW-104-07-G-S 1

above insulator

16 L1 Inductor, Metal Alloy, 1uH, 3.1A, 0.068ohm, SMT TOKO DFE201612C-H-1R0M 1

17 L2 Inductor, Ferrite, 10uH, 0.690A, 0.299ohm, SMT TDK Corporation VLF403212MT-220M 1

18 R1, RES, 0 ohm, 5%, 0.25W, 1206 Yageo America RC1206JR-070RL 2

19 R3, RES, 0.1 ohm, 5%, 0.125W, 0805 Panasonic ERJ-6RSJR10V 2

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USB2ANY Interface Board and I2C-Compatible Interface Program

Table 2. Bill of Materials (continued)

Item Desi Description Manufacturer Part Number Quantity

gnat

20 R5, RES, 3.01 ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW06033R01FKEA 2

21 R7, RES, 1.0k ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW06031K00JNEA 2

22 TP1 Test Point, TH, Compact, Red Keystone 5005 1

23 SH- Shunt, 100mil, Gold plated, Black 3M 969102-0000-DA 10

J1,

SH-

J2,

SH-

J3,

SH-

J4,

SH-

J5,

SH-

J6,

SH-

J7,

SH-

J8,

SH-

J9,

SH-

J10

5 USB2ANY Interface Board and I2C-Compatible Interface Program

Texas Instruments has created an I2C-compatible program and USB2ANY docking board that can help

exercise the part in a simple way. This document describes how to use the USB2ANY docking board and

interface software.

The LM3639A EVM has the means to connect the USB2ANY controller module which provides all the

control signals to operate the evaluation module. Power to the EVM 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 LM3639A 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.

5.1 EVM Setup

1. Plug in USB2ANY interface board into PC via USB cable and 10-pin Ribbon Cable into LM3639A

EVM.

2. Connect Power Supply to LM3639A EVM. Use the Red and Black Banana Jacks. Ensure current limit

is set to greater than 3A and that the voltage is set below 5.5V.

3. Unzip four GUI files (1 exe file, 3 DLLs) into a dedicated folder.

4. Run LM3639A_GUI_R1.0 application

SNVU211–March 2013 LM3639AYFQEVM User's Guide

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5.2 LM3639A GUI

Figure 11. LM3639A General User Interface

1. With the GUI running, press the READ button next to the Device ID Box

• If communication is working, a 0x11 should appear in the box.

• If nothing shows up in the box, press the default settings button

and press YES

10 LM3639AYFQEVM User's Guide SNVU211–March 2013

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