UM10891 datasheet(11/16 Pages) PHILIPS

Part #	UM10891

Description	GreenChip TEA1995DB1294 synchronous rectifier controller demo board

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Manufacturer	PHILIPS [NXP Semiconductors]

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UM10891

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User manual

Rev. 1 — 16 July 2015

11 of 16

NXP Semiconductors

UM10891

TEA1995DB1294 synchronous rectifier controller demo board

9.

TEA1995DB1294 board layout

Some important guidelines for a good layout:

• Keep the trace from the DSA/B pin to the MOSFET drain pin as short as possible.

• Keep the trace from the SSA/B pin to MOSFET source pin as short as possible.

• Keep the area of the loop from the DSA/B pin to MOSFET drain to MOSFET source to

the SSA/B pin as small as possible. Make sure that this loop overlaps the power drain

track or power source track as minimal as possible and the 2 loops do not cross each

other.

• Keep tracks from GD pins to gate of MOSFETs as short as possible.

• Decouple pins VCC and GND as close to the IC as possible with a small (100 nF)

capacitor.

• Use separate clean tracks for the VCC pin and GND. If possible, use a small ground

plane underneath the IC, which is good for heat dispersion.

• Keep the ground and source sense tracks separated. Use separate tracks for each

source sense connection and connect the IC ground to the ground plane on the PCB.

a. Front

b. Back

Fig 9.

TEA1995DB1294 demo board - Board layout

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