GE Industrial Solutions SHHN000A3 HAMMERHEAD Series - Manual (Page 7)

GE
Datasheet
SHHN000A3 Series; DC-DC Converter Power Modules
9Vdc – 36Vdc input; +15V, -15V Dual Output, 0.3A 9W Output
December 6, 2013
©2013 General Electric Corporation.
All rights reserved.
Page 7
Feature Description
Remote On/Off
Two remote on/off options are available. Positive logic turns the
module on during a logic high voltage on the on/off pin, and off
during a logic low. Negative logic remote on/off, device code
suffix “1”, turns the module off during a logic high and on during
a logic low.
ON/OFF
Vin+
Vin-
I
on/off
V
on/off
Vout+
Common
Vout-
Figure 11. Circuit configuration for using Remote On/Off
Implementation.
To turn the power module on and off, use a switch (open
collector or equivalent) to control the voltage (V
on/off
) between
the ON/OFF terminal and the V
IN
(-) terminal. Logic low is
0V ≤ V
on/off
≤ 0.8V. The maximum I
on/off
during a logic low is
0.15mA, the switch should maintain a logic low level whilst
sinking this current.
During a logic high, the typical V
on/off
generated by the module is
2.4V, and the maximum allowable leakage current at V
on/off
=
2.4V is 25μA.
If not using the remote on/off feature is designed such that:
For positive logic, leave the ON/OFF pin open.
For negative logic, short the ON/OFF pin to V
IN
(-).
Overcurrent Protection
To provide protection in a fault (output overload) condition, the
unit is equipped with internal current-limiting circuitry and can
endure current limiting continuously. At the point of
current-limit inception, the unit shall enter hiccup mode. The
unit shall operate normally once the output current is brought
back into its specified range. The average output current during
hiccup is 10% I
O, max
.
Overtemperature Protection
To provide protection under certain fault conditions, the unit is
equipped with a thermal shutdown circuit. The unit shall
shutdown if the thermal reference point Tref (Figure 13),
exceeds 110°C. The module shall automatically restart upon
cool-down to a safe temperature.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit, the
module operation shall be disabled. The module will only begin
to operate once the input voltage is raised above the
undervoltage lockout turn-on threshold, V
UV/ON
. Once operating,
the module shall continue to operate until the input voltage is
taken below the undervoltage turn-off threshold, V
UV/OFF
.
Over Voltage Protection
The output overvoltage protection shall consist of circuitry that
independently monitors the output voltage, and shuts the
module down if the output voltage exceeds specified limits. The
module shall contain hiccup restart capability.