LGA-THSK-KIT-045 EMERSON-NETWORKPOWER [Emerson Network Power], LGA-THSK-KIT-045 Datasheet - Page 6

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

Technical Reference Note
Applications (cont'd)
Setting Output Voltage (cont'd)
The trim equation for the potentiometer configuration show in Figure 7.
Where Vout is the desired output voltage, R trim1 (kΩ) and R trim2 (kΩ) are the resistors in Figure 7 and
R pot is the resistance of the potentiometer.
Undervoltage Lockout
These EPD's have built-in undervoltage lockout to ensure reliable output power. The lockout prevents the
unit from operating when the input voltage is too low. The UVLO for the LGA03/06/10C can be adjusted
with the following equation:
The UVLO for the LGA20C can be adjusted with the following equation:
Vout =
Remote
ON/OFF
Vin
Figure 7 - Output Voltage Trim -
(Rtrim2 + Rpot)Rtrim1
LGA C Series
with Potentiometer
0.591
-Sense
V out
Trim
R trim 1
R uvlo (kΩ) =
R uvlo (kΩ) =
* (2R trim2 + 2R pot + R trim1 R trim2 + R trim1 R pot + 2R trim1)
R trim 2
Rpot
6.81 * V turn_on - 18.16
8.577 * V turn_on - 34.32
14.8 * 6.81
30.1 * 4.22
1000000
100000
10000
1000
100
10
0
Figure 8 - Typical Trim Curves
DESIRED OUTPUT VOLTAGE SETPOINT (V)
1
Embedded Power for
Business-Critical Continuity
2
3
4
5
Rev. 12.07.09
LGA C Series
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