ame5142c AME, Inc., ame5142c Datasheet - Page 12

• Manufacturer Part Number: ame5142c
• Description: High Efficiency 6 White Led Driver With Open Led Protection
• Manufacturer: AME, Inc.

12
AME5142C
Board Layout Consideration
PCB Layout Example
1. Use a ground plane under the switching regulator to minimize inter-plane coupling.
2. Using 20mil wide track for GND (as wide as possible), and all GND nodes are as close as possible.
3. The SW node, schottky diode and output capacitor C2 signal path should be kept extremely short.
4. The feedback components R1,R2 and CF must be kept close to the FB pin of U1 to prevent noise injection
High frequency switching regulators require very careful layout of components in order to get stable operation and
low noise. A good PCB layout could make AME5142C work its best performance.
The PCB layout example of AME5142C for six strings of LEDs to be driven in one parallel application. The
placements is suitable and smooth, and follows the layout guide lines.
on the FB pin trace and keeping faraway from SW node.
AME
V
V
LED _
LED
_Anode
Cathode
C
F
C2
D1
Vo
GND
Vout
Vout
FB
1 SW
2 GND
3
SW
FB
FB
U1
SW
GND
High Efficiency 6 White LED Driver
GND
R2
IN
IN
5 OVP
4
6
C1
L1
EN
IN
With Open LED Protection
EN
R1
EN
Enable
Rev. B.01