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ZXLD1350EV2
ZXLD1350EV2 User Guide Iss 5 10-04-07
ZXLD1350EV2 Evaluation Board.
Ref Value Package Part Number Manufacturer Notes
R
S
0.33R
1%,200ppm
0805 NCST10FR330FTRF NIC
components
R1,R2 Not fitted 0805 Not fitted
C1,C2 1uF, 50V 1206
50V, 1206 X7R
NMC1206X7R105K50F
NIC
components
C3 Not fitted 0805 Not fitted
L1 100uH NPIS53D101MTRF NIC
components
100uH/0.5A rms
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,
JP3
Jumper Various 2.54mm pitch
jumper pin strips
+VIN, GND,
ADJ, LED a,
LED k
Test loop 100-108 Hughes
J1 6 way
connector
5535676-5 TYCO
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.
U1
+VIN
GND
ADJ
ZXLD1350EV2 EVALUATION BOARD
Bare board: ZDB308R3
L1
SD1
JP2
C3
Copyright Zetex Plc 2006
a
k
a
k
a
k
R1
JP3
JP1
LED a
LED k
RS
C1
C2
R2
In partnership with:
D1
D2
D3
1
J1
Figure 3: Component layout