TDK Xeta Half Brick-iHG User Manual

Page 13

Data Sheet: Xeta



iHG48070A033V, 3.3V/70A Output Half Brick Series

℡

(877) 498-0099

13/16

Operating Information:

Over-Current-Protection (OCP): The power
modules have current limit protection to
protect the module during output overload and
short circuit conditions. During overload
conditions, the power modules may protect
themselves by entering a hiccup current limit
mode. The modules will operate normally once
the output current returns to the specified
operating range. A latched over-current
protection option is also available. Consult the
TDK Innoveta technical support for details.

Output Over-Voltage-Protection (OVP): The
power modules have a control circuit,
independent of the main control loop, that
reduces the risk of over voltage appearing at
the output of the power module during a fault
condition. If there is a fault in the voltage
regulation loop, the over voltage protection
circuitry will cause the power module to shut
down. The module will try to auto re-start in 1
+/- 0.2 sec time period. An optional feature
with latched OVP protection can also be
offered. Consult the TDK Innoveta technical
support for details.

Thermal

Protection: When the power

modules exceed the maximum operating
temperature, the modules may turn-off to
safeguard the power unit against thermal
damage. The module will auto restart as the
unit is cooled below the over temperature
threshold.

latched

over-temperature

protection option is also available. Consult the
TDK Innoveta technical support for details.

Remote On/Off: - The power modules have
an internal remote on/off circuit. The user must
supply an open-collector or compatible switch
between the Vin(-) pin and the on/off
pin. The maximum voltage generated by the
power module at the on/off terminal is 15V.
The maximum allowable leakage current of
the switch is 50uA. The switch must be
capable of maintaining a low signal Von/off <
0.8V while sinking 400uA.

The standard on/off logic is positive logic. The
power module will turn on if terminal 2 is left
open and will be off if terminal 2 is connected
to terminal 4. An optional negative logic is
available. The power module will turn on if
terminal 2 is connected to terminal 4, and it
will be off if terminal 2 is left open.

On/ Off

Vin (+)

Vin(-)

An On/Off Control Circuit

Output Voltage Adjustment: The output
voltage of the power module may be adjusted
by using an external resistor connected
between the Vout trim terminal (pin 7) and
either the Sense (+) or Sense (-) terminal. If
the output voltage adjustment feature is not
used, pin 7 should be left open. Care should
be taken to avoid injecting noise into the
power module’s trim pin. A small 0.01uF
capacitor between the power module’s trim pin
and Sense (-) pin may help to avoid this.

Trim

Vout(-)

Sense(+)

Vout(+)

Sense(-)

Rdown

Circuit to decrease output voltage