UM10892 Datasheet, PDF (9/16 Pages) NXP Semiconductors – GreenChip TEA1995DB1295 synchronous rectifier controller demo board

NXP Semiconductors
UM10892
TEA1995DB1295 synchronous rectifier controller demo board
7. Schematic
Figure 8 shows the schematic diagram of the TEA1995DB1295 demo board. Basically,
the board consists of the TEA1995T SR and two SR MOSFETs. The TEA1995T acts as a
dual controlled amplifier. For each side, the input is the voltage difference between drain
and source. The corresponding gate driver signal is the output.
Resistors R1 and R2 are added to ensure easy layout design for a single-sided board.
The resistor values must be in the range of 0  to 10 . Use the lowest value for the
fastest turn-off time. Capacitor C1 is a decoupling capacitor for the V_CC of the TEA1995T.
Connect it close to the IC. In combination with resistor R5, it acts as a simple RC filter.
Provisions are made for snubbers resistor R3/capacitor C2 and resistor R4/capacitor C3.
The components are not mounted. However, if high-voltage spikes are present on the
drain-source connections of the MOSFETs, they can be added.
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UM10892
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 8 July 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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