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 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.
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. 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
