UM0422 datasheet(10/14 Pages) STMICROELECTRONICS

Part #	UM0422

Description	Constant current controller for high brightness LEDs

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Schematic and bill of materials

UM0422

10/14

5.2

Bill of materials (BOM)

Table 4.

Bill of materials

Qty

Ref.

Description

Part number

Manufacturer

Footprint

1

C1

22 nF ± 10%, X7R, 16 V

GRM188R71C223KA01

Murata

0603

1CSLOPE1

1 nF ± 10%, X7R, 16 V

GRM155R71C102KA01

Murata

0805

1

C3

1 µF± 10%, X7R, 50 V

GRM21BR71H105KA12

Murata

0805

4

CSLOPE2,

C7,C8,C9

100 nF ± 10%, X7R, 16 V

GRM219R71C104KA01

Murata

0805

1Cbypass

0.1 µF± 10%, X7R, 50 V

GRM21BR71H104KA01

Murata

0805

1

C6

0.33 µF± 10%, X7R, 16 V

GRM21BR71C334KA01

Murata

0805

1

D1

Disc LED

LH R974

1

D3

White LED

LXHLPW09 B

Lumileds

1

D4

Schottky diode

BAT46ZFILM

STMicroelectronics

SOD-123

1J1

CON4

2

J2,J4

CON3

1J3

CON2

1

J5

JUMPER

3

R4,R7

10 k

Ω, 1%, 1/16 W

0805

1

Rf

100

Ω, 1%, 1/16 W

0805

1Rsense

0.33

Ω ± 1%, 1/4 W

0805

2

R2,R1

18 k

Ω ± 1%, 1/4 W

0805

1

R3

6.8 k

Ω ± 1%, 1/4 W

0805

2

R5

1.8 k

Ω ± 1%, 1/4 W

0805

1

R6

330 ± 1%, 1/4 W

0805

1R8

Pot 1MEG

-

1R9

Pot 10 k

-

1

R10

220 k

Ω ± 1%,1/4 W

0805

1

R13

180 ± 1%, 1/4 W

0805

1

U1

Current control

STCS1APUR

STMicroelectronics

QFN 3X3-8L

1

U2

Comparator

TS3702IPT

STMicroelectronics

SOG.65M/8/

WG8.20/L3.17

1

U3

Voltage regulator

L78L05ABUTR

STMicroelectronics

SOT89

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