75 Watt, High Density, Eighth Brick DC/DC Converter

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OPERATING INFORMATION

Enable Pin

The Enable Pin (pin 2) enables the user to control when the converter will turn on or off. This pin is

referenced to –Vin (pin 3). There are two versions available for each converter, positive logic and

negative logic. For positive logic, leaving the Enable pin open or applying TTL/CMOS high voltage level

turns the converter on, while pulling this pin to –Vin or drawing more than 1mA turns it off. The negative

logic is just the inverse. An external semiconductor switch or mechanical switch can be used to

implement this function.

Remote Sense

The remote sense pins +Sense (pin 7) and –Sense (pin 5) allows the converter to correct for voltage drops

across the connections from the converter output pins +/-Vout (pins 8 and 4 respectively) to the intended

load. The +/- Sense pins should be connected at the point in the board where regulation is needed. Figure

3 shows the recommended connection.

Figure 3: Remote Sense connection

The resistive drop across the connections should be small enough since Over Voltage Protection might be

triggered during high load applications. The OVP circuit senses the +/-Vout pins.

Figure 3: Remote Sense Connection