Zetex Semiconductors PLC zxld1350ev2 ZXLD1350EV2 EVALUATION BOARD, k D1 a JP1, LED k JP2 J1, k D2

ZXLD1350EV2

ZXLD1350EV2 Evaluation Board.

Ref	Value	Package	Part Number	Manufacturer	Notes
RS	0.33R	0805	NCST10FR330FTRF	NIC
	1%,200ppm			components
R1,R2	Not fitted	0805			Not fitted
C1,C2	1uF, 50V	1206	50V, 1206 X7R	NIC
			NMC1206X7R105K50F	components
C3	Not fitted	0805			Not fitted
L1	100uH		NPIS53D101MTRF	NIC	100uH/0.5A rms
				components	Inductor
SD1	40V, 1.16A	SOT23	ZLLS1000	Zetex	Schottky diode
U1	ZXLD1350	TSOT23-5	ZXLD1350E5TA	Zetex	DC-DC converter
D1, D2, D3	1W LED		LXHL-PW01	Lumileds	1W power LED
JP1, JP2,	Jumper			Various	2.54mm pitch
JP3					jumper pin strips
+VIN, GND,	Test loop		100-108	Hughes
ADJ, LED a,
LED k
J1	6 way		5535676-5	TYCO
	connector

The slugs of the 1-watt LEDs are connected to isolated copper 'floods' both on the top and bottom layers, with thermal inter-connection between the layers. The slugs are electrically isolated from other circuits and pads on the evaluation board. Warning: At a nominal 24V operation with 300mA output, the board temperature rises by around 30C from ambient after 30 minutes of operation.

ZXLD1350EV2 EVALUATION BOARD

k

D1

a

JP1

LED k

JP2

J1

+VIN

GND

C3

C2

L1 R2

U1

SD1

C1

k

D2

R1 RS

a

1

ADJ JP3

D3

Bare board: ZDB308R3 Copyright Zetex Plc 2006

k

In partnership with: LED a

a

Figure 3: Component layout

ZXLD1350EV2 User Guide Iss 5 10-04-07