atmel msl2010 key features -...

APPLICATION NOTE

Atmel MSL2010 Single String LED Driver Boost Demo Board

Atmel MSL2010

Key Features

• Fully assembled and tested

• DC to DC converter generates VLED

• External 12V power supply included

• Built In PWM generator

• PWM input allows optional external brightness control

• Includes a single string of 10 white LEDs

• I2C interface

General Description

The Atmel® MSL2010 Boost Demo Board demonstrates a one-string LED driver with built-in boost regulator. The Demo Board is fully assembled and tested, and includes a potentiometer controlled Pulse Width (PWM) generator for LED brightness. Simply connect the included power supply and turn the knob to control the LED brightness. The circuit includes strategically placed jumpers, test points, a PWM input, I2C connections and un-installed component footprints to allow basic evaluation of the MSL2010.

Figure 1. Atmel MSL2010 Boost Demo Board.

42100A−LED−04/2014

Atmel MSL2010 Single String LED Driver Boost Demo Board [APPLICATION NOTE] 42100A−LED−04/2014

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Table of Contents

1. Kit Contents ......................................................................................... 3

2. Operation of the Boost Demo Board .................................................... 3

3. Atmel MSL2010 Boost Demo Board Jumper Settings ......................... 4 3.1 Jumper Details .................................................................................................. 4

4. Atmel MSL2010 Boost Demo Board Design Files ............................... 5

5. Revision History ................................................................................. 11


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1. Kit Contents • Atmel MSL2010 Boost Demo Board

The demo board contains the MSL2010 LED driver/controller, LED drive MOSFET, boost regulator, I2C I/O and a PWM generator

• External Power Supply The power supply provides the 12V input voltage required to power the Demo Board

• LEDs The LEDs are configured as 10 series LEDs in a single string

Figure 1-1. MSL2010 Boost Demo Board

2. Operation of the Boost Demo Board 1. Connect the supplied 12V power supply to J2 and plug in the supply to 110VAC (90VAC to 255VAC):

a. Alternatively, apply 10V to 15V DC across jumpers J13(+)/J14(-). 2. Turn potentiometer R20 to adjust LED brightness.

Power in: 12V

Brightness Adjust


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3. Atmel MSL2010 Boost Demo Board Jumper Settings

Table 3-1. Jumper Defaults

Jumper Default Function

J1 Shorted by circuit trace Power for Boost

J3 Shorted by circuit trace Connects LED string to VLED

J4 Shorted by circuit trace Connects FBO to FB

J5 Shorting bar installed Connects pull-up for EN

J6 Shorting bar installed Connects pull-up for SCL

J7 Shorting bar installed Connects pull-up for SDA

J8 Shorted by circuit trace Connects FLTB to fault indicator LED, D12

J9 (3-pin) Shorting bar installed across pins 2 and 3 Connects PWM generator to MSL2010 PWM input

J13 Shorted by circuit trace Power input to board; use as alternative to J2 when powering the board from a bench supply. Power distributes from J13 to J1, U1-16, U1-21 and R21.

J14 Shorted by circuit trace Board ground

J16 Shorted by circuit trace RTOFF connection

3.1 Jumper Details • J1: Passes the incoming 12V power to the boost converter. To supply the boost converter from an external

supply, cut the trace below J1, on the bottom of the board, and apply external power to the boost via J1-1 or TP16

• J3: Connects the LED string to the output of the boost regulator. Cut the trace under J3 to monitor LED string current. Additionally an external LED load can be used by connecting the anode connection to J3 pin 2 and the LED cathode TP12

• J4: Connects FBO to FB. Allows the EO to optimize VLED

• J5, J6 and J7: Connect the pull-up resistors for the Enable, SDA and SCL inputs

• J8: Connects indicator LED D12 to FLTB. FLTB pulls low for over-temperature condition, turning on D12

• J9: Shorting pins 1 and 2 (default) connects the MSL2010 PWM input to the output of the on-board PWM generator. Shorting pins 2 and 3 connects the PWM input to a pull-up resistor for permanent 100% duty cycle. To apply an external PWM signal remove the jumper from J9 and apply the PWM signal to J9-2, or to P1-3/4

• J13(+), J14(-): Allows connection of an external 10VDC to 15VDC power supply to drive the board, in place of the supplied 12V power supply

• J16: Connects the RTOFF input to the external time resistor to set the off time of the boost converter. To use a potentiometer remove R12 and install the pot into position R16


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4. Atmel MSL2010 Boost Demo Board Design Files

Figure 4-1. MSL2010 Boost Demo Board Schematics

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MSL2010 Boost Demo_R3.SchDoc

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5/7/2013

10:54:24 AM

MSL2010 Boost Demo Board

ATMEL Corporation MCU

1600 Technology Drive, San Jose CA. 95110

PAGE:

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TITLE:

Document number:

Revision:A

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+12V

+12V

+5V

+12V

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R4

D1

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R4

D2

OV

SPW

1BC

R4

D3

OV

SPW

1BC

R4

D4

OV

SPW

1BC

R4

D5

OV

SPW

1BC

R4

D6

OV

SPW

1BC

R4

D7

OV

SPW

1BC

R4

D8

OV

SPW

1BC

R4

D9

OV

SPW

1BC

R4

D10

2.2K

R2

2.2K

R3

0.1

R14

0R13

1R7

10K

R1

1KR4

1uF/

25V

C6

1uF/

25V

C12

10uF

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C10

10uF

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C11

FDD

3860

2

1

3Q2

22uH

L1

46.4

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11

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1 3

2

R16

TP5

TP6

TP7 TP

8

TP13

TP12

TP14

TP15

TP11

TP10

200K

R8

DN

IR

947

KR

10

8.2p

FC

9

10nFC8

DN

IC

13

DN

IC

14D

NI

12

J16

HD

R1X

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J13

HD

R1X

2

12

J14

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R17

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I1

2

J4

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TP16

DN

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TP3

TP4

GN

D1

GN

D2

GN

D3

GN

D4

TP9

47K

R12

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VC

1D

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7

SS16

D13

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7N10

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2

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3

2

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T54S

D11 5 3

24

74A

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1G14

U2

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R19

470

R18 0.

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3

1 3

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TP2

TP1

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3 5 7 9 11

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12

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SCL

4

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6

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8

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C22

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D24

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CS

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6

Figure 4-2. Atmel MSL2010 Boost Demo Board Component Layout


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Figure 4-3. Atmel MSL2010 Boost Demo Board Component Side


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Figure 4-4. Atmel MSL2010 Boost Demo Board Solder Side


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Table 4-1. Atmel MSL2010 Boost Demo Board Bill of Materials

Reference Designator Value Description Mfr PN

C1 10µF/100V Cap cer 10µF 100V 20% X7S 2220 C5750X7S2A106M

C2 0.22µF/10V Cap cer 0.22µF 10V 10% X7R 0603 CC0603KRX7R6BB224

C3 0.1µF/16V Cap cer 0.1µF 16V 10% X7R 0603 GRM188R71C104KA01D

C6, C12 1µF/25V Cap cer 1µF 25V Y5V 0805 C2012Y5V1E105Z/0.85

C8 10nF Cap cer 10000pF 16V 10% X7R 0805 C0805C103K4RACTU

C9 8.2pF Cap cer 8.2pF 50V NP0 0805 08055A8R2CAT2A

C10, C11 10µF/25V Cap cer 10µF 25V 10% X5R 0805 C2012X5R1E106K

C15 22µF/25V Cap alum 22µF 25V 20% SMD EEE-FT1E220AR

C16 33µF/63V Cap alum 33µF 63V 20% RADIAL EEU-FC1J330

D1, D2, D3, D4, D5, D6, D7, D8, D9, D10

OVSPW1BCR4 LED white 6X6mm SMD 120deg OVSPW1BCR4

D11 BAT54S Diode Schottky 30V 200mW SOT23-3 BAT54S-7-F

D12 RED LED super red clr thin 0603 LTST-C191KRKT

D13 SS16 Diode Schottky 1A 60V SOD123 SMA SS16

GND1, GND2, GND3, GND4 Test point

J1, J3, J4, J8, J16 DNI Conn hdr brkway .100 2pos vert HDR1X2 4-103328-0

J2 PJ-102A Conn jack power 2.1mm PCB TH PJ-102A

J5, J6, J7, J13, J14 HDR1X2 Conn hdr brkway .100 2pos vert HDR1X2 4-103328-0

J9 HDR1X3 Conn hdr brkway .100 2pos vert HDR1X3 4-103328-0

L1 22µH Inductor 22µH 2A shield SMD CDRH8D38NP-220NC

P1 HDR2X6 Conn hdr brkway .100 2pos vert HDR2X6 4-103328-0

Q1 FQD7N10LTM MOSFET N-ch 100V 5.8A DPAK TO252-3M FQD7N10LTM

Q2 FDD3860 MOSFET N-ch 100V 6.2A DPAK TO252-3M FDD3860

R1 10kΩ Res 10.0kΩ 1/8W 1% 0805 SMD ERJ-6ENF1002V

R2, R3 2.2kΩ Res 2.2kΩ 1/8W 5% 0805 SMD ERJ-6GEYJ222V

R4 1kΩ Res 1.00kΩ 1/8W 1% 0805 SMD ERJ-6ENF1001V

R5 100kΩ Res 100kΩ 1/10W 1% 0603 SMD RMCF0603FT100K

R6 100kΩ Res 100kΩ 1/8W 1% 0805 SMD ERJ-6ENF1003V

R7 1Ω Res 0.56Ω 1/10W 1% 0603 SMD ERJ-14YJ1R0U

R8 200kΩ Res 200kΩ 1/8W 5% 0805 SMD RMCF0805JT200K

R10, R12 47kΩ Res 47.0kΩ 1/8W 1% 0805 SMD ERJ-6ENF4702V

R11 46.4kΩ Res 46.4kΩ 1/8W 1% 0805 SMD ERJ-6ENF4642V

R13, R21, R22 0Ω Res 0.0Ω 1/8W 0805 SMD ERJ-6GEY0R00V

R14 0.1Ω Res .10Ω 1/2W 5% 1210 73L5R10J

R15 1MΩ Res 1.0MΩ 1/8W 5% 0805 SMD ERJ-6GEYJ105V

R17 4.7kΩ Res 4.7kΩ 1/8W 5% 0805 SMD RMCF0805JT4K70

R18 470Ω Res 470Ω 1/10W 1% 0603 SMD RMCF0603FT470R

R19 10kΩ Res 10kΩ 1/10W 1% 0603 SMD RMCF0603FT10K0

R20 50kΩ Trimmer 50kΩ 0.5W TH 3386P-1-503TLF


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TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12, TP13, TP14, TP15, TP16

Test point HDR1X1

U1 MSL2010 MSL2021 TQFN24

U2 74AHC1G14 IC Schmitt-trg inv gate SOT23-5 SN74AHC1G14DBVR

X1 12V 2A power supply Trans adapter wall 24W 12V PSA24A-120(P)

C4 DNI DNI

C5 DNI DNI

C7 DNI DNI

C13, C14, R9 DNI DNI

R16 DNI DNI


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5. Revision History Doc. Rev. Date Comments

42100A 04/2014 Initial document release

Atmel Corporation 1600 Technology Drive San Jose, CA 95110 USA Tel: (+1)(408) 441-0311 Fax: (+1)(408) 487-2600 www.atmel.com

Atmel Asia Limited Unit 01-5 & 16, 19F BEA Tower, Millennium City 5 418 Kwun Tong Road Kwun Tong, Kowloon HONG KONG Tel: (+852) 2245-6100 Fax: (+852) 2722-1369

Atmel Munich GmbHBusiness Campus Parkring 4 D-85748 Garching b. Munich GERMANY Tel: (+49) 89-31970-0 Fax: (+49) 89-3194621

Atmel Japan G.K.16F Shin-Osaki Kangyo Building 1-6-4 Osaki, Shinagawa-ku Tokyo 141-0032 JAPAN Tel: (+81)(3) 6417-0300 Fax: (+81)(3) 6417-0370

© 2014 Atmel Corporation. All rights reserved. / Rev.: 42100A−LED−04/2014

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