Datasheet

5 V

VCC

VDVS

VCC

VDVS

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Installation

2 Installation

To install the demonstration board, remove the diode to be emulated. Connect the VS pin of the board to

the anode pad of the host circuit, and connect the VD pin of the board to the cathode pad of the host

circuit. Connect the VCC terminal to the 5-V output with a short piece of wire. For DCM applications, the

installation is complete.

Figure 2. Demonstration Replacement Card Connection for DCM Application

In CCM applications, a primary-side-derived signal is coupled into the SYNC terminal as described below

in this user guide.

Although the demonstration board may be applied to the circuit across an existing negative-leg diode and

will function correctly without removing that diode, efficiency comparison results may be inaccurate

because of parasitic losses attributable to the diode’s high junction capacitance.

An optional D-Pak SMT Heatsink may be mounted on the demonstration board by the user to increase the

thermal dissipation capability of the board if a higher-power application results in excess SR-MOSFET

case temperatures. Forced airflow from a fan can also help extend the power level to be evaluated.

Figure 3. Pictorial View of Daughter Card

SLUU450–September 2010 UCC24610EVM-693 Secondary-Side Synchronous Rectifier Controller Diode

Replacement Demonstration Board

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