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Application Note 1668

5

AN1668.0

December 13, 2011

Bill of Materials

DESIGNATOR

PART TYPE

FOOTPRINT

PART MANUFACTURER/NUMBER

R1

150k

603

1% SMD Resistor

R2

100k

603

General purpose

R3

357k

603

 

R4

10k

603

 

R5

1M

VRES

 

R6

0

603

 

R7

Open

603

 

R8

5k

603

 

R9

10k

603

 

R10

0

603

 

R11

100k

VRES

 

R12

0

603

 

R13

Open

603

 

L1

15µH

 

CoilCraft (XAL6060-153MEB)

D1

PMEG6030

C1

10µF/35V

1210

General purpose

 

C2

0.1µF/50V

603

Ceramic X5R/X7R capacitors

C3

33pF

603

 

C4

1µF/16V

603

 

C5

4.7µF/50V

1210

Murata, GRM32ER71H475KA88L

C6

4.7µF/50V

1210

 

C7

Place Holder

1210

Not Populated

C8

Place Holder

1210

 

C9

100pF/50V

603

General purpose

 

C10

3.3nF/50V

603

Ceramic X5R/X7R capacitors

C11

1nF/50V

603

 

C12

1nF/50V

603

 

C13

1nF/50V

603

 

C14

1nF/50V

603

 

C15

8.2nF

603

 

F1

2A Fuse

1206

Bel Fuse Inc, C1Q 2

U1

 

QFN16 3MM

Intersil, ISL97682/3/4

JP2-JP19

JUMPER-2PIN

JUMPER-2PIN

FCI

WR

JUMPER-2PIN

JUMPER-2PIN

68000-236HLF-1x2

JP1

JUMPER-3PIN

JUMPER-3PIN

FCI

JP20

JUMPER-3PIN

JUMPER-3PIN

68000-236HLF-1x3

LED1-12 LED25-36

LED-SMT

LW_Y87C

 

TP1

LX

TEST POINT

Keystone Electronics

TP2

VOUT

TEST POINT

5010

Summary of Contents for ISL97684

Page 1: ...asily adjusting the LED maximum DC current please refer to the evaluation board schematic on page 2 for more details LED dimming frequency and duty cycle 1 As mentioned in Step 4 when the shunt on JP20 is connected to the upper position and the FPWM DPWM pin is connected to VDC the device enters direct PWM mode which means both the LED dimming frequency and the duty cycle are synchronized with the...

Page 2: ... 1nF 50V C11 1nF 50V R5 1M R6 0 R7 open R8 5k R9 10k C15 8 2nF C3 33PF TP1 LX TP2 VOUT TP3 CH1 TP4 CH2 TP5 CH3 TP6 CH4 TP7 VDC P5 AGND P6 AGND P7 AGND P8 AGND P9 PGND P10 PGND 2 layer board Connect top layer PGND and bottom layer AGND at one single point through the via on the thermal pad under the chip F1 2A Fuse JP14 R11 100k R10 0 R13 Open R12 27k JP15 JP16 JP17 JP18 ISL97684EVAL1Z Rev A EN can...

Page 3: ...Application Note 1668 3 AN1668 0 December 13 2011 PCB Layout FIGURE 2 TOP SILKSCREEN LAYER AND TOP LAYER ...

Page 4: ...Application Note 1668 4 AN1668 0 December 13 2011 FIGURE 3 BOTTOM LAYER PCB Layout Continued ...

Page 5: ...C3 33pF 603 C4 1µF 16V 603 C5 4 7µF 50V 1210 Murata GRM32ER71H475KA88L C6 4 7µF 50V 1210 C7 Place Holder 1210 Not Populated C8 Place Holder 1210 C9 100pF 50V 603 General purpose C10 3 3nF 50V 603 Ceramic X5R X7R capacitors C11 1nF 50V 603 C12 1nF 50V 603 C13 1nF 50V 603 C14 1nF 50V 603 C15 8 2nF 603 F1 2A Fuse 1206 Bel Fuse Inc C1Q 2 U1 QFN16 3MM Intersil ISL97682 3 4 JP2 JP19 JUMPER 2PIN JUMPER 2...

Page 6: ...om AN1668 0 December 13 2011 TP3 CH1 TEST POINT TP4 CH2 TEST POINT TP5 CH3 TEST POINT TP6 CH4 TEST POINT TP7 VDC TEST POINT TP8 RSET TEST POINT TP9 FSW PHS TEST POINT P5 AGND TEST POINT Keystone Electronics P6 AGND TEST POINT 5011 P9 PGND TEST POINT P1 PVIN POWERPOST Mill Max P2 VIN POWERPOST 3156 1 00 00 00 00 08 0 P3 EN POWERPOST P4 PWMI POWERPOST P7 AGND POWERPOST P8 AGND POWERPOST P10 PGND POW...

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