LGA-THSK-KIT-045 EMERSON-NETWORKPOWER [Emerson Network Power], LGA-THSK-KIT-045 Datasheet - Page 3

• Manufacturer Part Number: LGA-THSK-KIT-045
• Description: Embedded Power Device
• Manufacturer: EMERSON-NETWORKPOWER [Emerson Network Power]

Technical Reference Note
Features and Functions
Output Voltage Adjustment
The output voltage on all models is adjustable from 0.59 - 5.1 V.
Undervoltage Lockout
The default undervoltage lockout is set as follows:
Current Limit and Short-Circuit Protection
The LGA C models have a built-in non-latching current limit function and full continuous short-circuit
protection. The module monitors current through the top and bottom FET. When an overcurrent
condition occurs, the module goes into hiccup mode, where it attempts to power up periodically to
determine if the problem persists.
The output current level is sensed through the voltage drop across the top and bottom FETs during
their on time. This type of sensing is affected by temperature due to the change in Rdson. At higher
temperatures, the Rdson increases, which lowers the overcurrent point.
Note that the module specifications are not guaranteed when the unit is operated in an overcurrent
condition.
Remote ON/OFF
The remote ON/OFF input allows external circuitry to put the LGA C Series converter into a low dissipation
sleep mode. Positive logic remote ON/OFF is available as standard.
The EPD is turned on if the remote ON/OFF pin is high or floating. Pulling the pin low will turn off the EPD.
To guarantee turn-on, the enable voltage must be above 0.50 V. To turn off the enable voltage, it must be
pulled below 0.2 V.
Figures illustrating the response of the unit to switching on and off using the remote ON/OFF feature are
included on pages 13, 16, 20 and 25. Figures 3 and 4 show various circuits for driving the remote ON/OFF
feature. The remote ON/OFF input can be driven through a discrete device (e.g. a bipolar signal transistor)
or directly from a logic gate output. The output of the logic gate may be an open-collector (or open-
drain) device. Please note the remote ON/OFF pin should only be driven in the following range:
If,
If,
Vin ≤ 5 V, Von/off (max) = Vin
Vin > 5 V, Von/off (max) = 5 V
LGA 03/06/10C: 2.9 V
LGA20C: 4.3 V
Embedded Power for
Business-Critical Continuity
Rev. 12.07.09
LGA C Series
3 of 28