Data Sheet: Xeta
iHG48070A033V, 3.3V/70A Output Half Brick Series ©2008 TDK Innoveta Inc.
iHG Datasheet 2008-05-15 Revision 1.1
℡
(877) 498
-
0099
13/16
Operating Information: Over-Current-Protection (OCP): The power
modules have current lim it protection to
protect the module during output overload and
short circuit condi tions. During overload
conditions, the power modules may protect
themselves b y 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 po wer module during a fault
condition. If there is a fault in the voltage
regulation loop, t he over voltage protection
circuitry will cause the power module to shut
down. The m odule will try t o 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 po wer
modules exceed the maximum operating
temperature, the m odules ma y turn-off to
safeguard the power unit against thermal
damage. T he module will auto restart as the
unit is cooled below the over temperature
threshold. A 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. T he maximum voltage generated by th e
power module at the on/o ff 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 tur n 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 ex ternal resistor connected
between the Vout trim terminal (pin 7) and
either the Sense (+) or Sense (-) term inal. 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