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URA_LD-15W&URA_LD-20W

2013.06.13-B/1

Page 3 of 6

EMC RECOMMENDED CIRCUIT

Vin

G ND

+Vo

-Vo

(0 V)

EUT

L O AD

C2

L CM

②

C0

TVS

L DM

MOV

FUSE

①

C1

C4

Vin

G ND

C3

(Figure1)

URA_LD-15W recommended external circuit parameters:

Model

URA24_LD-15W

URA48_LD-15W

FUSE

Choose according to load

MOV

S10K35

S10K60

LDM

56

μH

56

μH

TVS

SMCJ48A

SMCJ90A

EMS

C0

120

μF/50V

120

μF/100V

C1

4.7

μF/50V

1

μF/100V

LCM

1250

μH

1250

μH

C2

4.7

μF/50V

1

μF/100V

C3

1000pF/2KV

1000pF/2KV

EMI

C4

1000pF/2KV

1000pF/2KV

URA_LD-20W recommended external circuit parameters:

Model

URA24_LD-20W

URA48_LD-20W

FUSE

Choose according to load

MOV

S10K35

S10K60

LDM

56

μH

56

μH

TVS

SMCJ48A

SMCJ90A

EMS

C0

120

μF/50V

120

μF/100V

C1

4.7

μF/50V

4.7

μF/100V

EMI

C2

--

4.7

μF/100V

This common choke LCM has been defined as follow

(Can be assembled by hand):

u

Core:P5T,14*8*7,Base(Optical)

L:1250

µH ±25%,DCR:250mΩ(max.)

u

Wire: diameter 0.4mm

Ø

A Height:11.2mm(max.)

Ø

B Terminal Length: 4.0mm(max.)

Ø

C Terminal Pitch: 7.5mm(max.)

Ø

D Terminal Pitch: 7.5mm(max.)

u

Test condition: 100KHz/100mV

u

Recommended through hole:

Ø0.9mm

u

All dimensions in millimeters

Note: 1. In Figure 1,part① is EMS recommended external circuit, part② is EMI recommended external circuit. Choose according to requirements.

2. If there is no recommended parameters, the model no require the external component.

EMC RECOMMENDED CIRCUIT PCB LAYOUT