GPP5V0-20 Datasheet, PDF (6/8 Pages) Galaxy Power, Inc. – Polaris Series

Application Notes
Signal Characteristics: Per table on page 5.
Input Signals:
Enable_L: This unit has both primary and secondary
output enable:
Primary Enable_L: This input signal is used to enable
the output of the converter when activated (active Low).
The signal is referenced to the input side (-Vin pin 11).
Secondary Enable_L: This input signal is used to
enable the output of the converter when activated (active
Low). The signal is referenced to the output side
(-Sense).
Enable Controls
Primary Enable_L
Low
High or Open
Low
High or Open
Secondary Enable_L
Low
Low
High or Open
High or Open
Output Voltage
On
Off
Off
Off
Output Voltage Adjust: The output voltage of the
converter can be adjusted above or below the nominal
output voltage as specified in the Output Characteristics
Table. The range of adjustment above the nominal
output voltage is limited by the internal overvoltage trip
point settings. The overvoltage trip point settings do
not change with output voltage adjustments.
Output Voltage Turn On Time: The external circuit
used to turn on the converter's "enable circuit" is per the
Figure on page 5.
Voltage Programming: A voltage may be applied
between the “Trim” pin (pin 4) and the “– Sense“ pin
(pin 1) to adjust the output voltage up or down from the
nominal output. V_o is the desired output voltage.
For the GPP1V5-15 and GPP1V5-25, the trim voltage
for these two units is:
90.5
12.1
V_TRIM
=
———
44.97
*
V_O
–
——
6
Volts
For the GPP2V2-15 and GPP2V2-25, the trim voltage
for these two units is:
V_TRIM = —11—.4—93—5 * V_O – —12—.1 Volts
8.3862
6
For the GPP3V3-15 and GPP3V3-25, the trim voltage
for these two units is:
V_TRIM
=
—4.0—67—
2.06
*
V_O
–
—12—.1
3
Volts
For the GPP5V0-15 and GPP5V0-20, the trim voltage
for these two units is:
VTRIM =
—1—.82—9 —* ^V—o —- ^{6—.05—} Volts
1.238
Resistor Programming:
Output voltage may be adjusted down from the nominal
output voltage with a resistor connected between the
“Trim” pin (pin 4) and the “-Sense” pin (pin 1).
For the GPP1V5-15 and GPP1V5-25, the trim resistor,
R_trim for these two units is:
R_TRIM =
(—18—. 1—37—9 –—18—.1—00—*—V—_O) _Kohms
V_O – 1.499
For the GPP2V2-15 and GPP2V2-25, the trim resistor,
R_trim for these two units is:
R_TRIM
=
—16—9.1—21—7 —– ^{1—14—.9—35—*} —V^O—
6.35 _* V_O – 13.977
Kohms
For the GPP3V3-15 and GPP3V3-25, the trim resistor,
R_trim for these two units is:
R_TRIM
=
—2—
5
*
—(2—49—.26—–—12—2.0—1—* ^V—O—)
2.49 _*V_o – 8.24
Kohms
For the GPP5V0-15 and GPP5V0-20, the trim resistor,
R_trim for these two units is:
R_TRIM =
—18—.29—*—V—o ^{–—6—0.5—0} Kohms
5 – V_O
Output voltage may be adjusted up from the nominal
output voltage with a resistor connected between the
“Trim” pin (pin 4) and the “+ Sense” pin (pin 2).
For the GPP1V5-15 and GPP1V5-25, the trim resistor,
R_trim for these two units is:
R_TRIM
=
—⁽¹â€”^8.1—³â€”⁷⁹—^–—^9.—¹⁰—^{6 *}—^V—^o)—
V_O – 1.499
Kohms
For the GPP2V2-15 and GPP2V2-25, the trim resistor,
R_trim for these two units is:
RTRIM
=
—¹⁶—^9.—¹²â€”¹⁷—^–—³¹â€”^.0—⁷³â€”^*—^V—^O
6.35 _* V_O – 13.977
Kohms
For the GPP3V3-15 and GPP3V3-25, the trim resistor,
R_trim for these two units is:
RTRIM
=
—2—
5
*
—(2—49—.2—6 ^{–—60—.2—1 *—V—O)—}
2.49 _*V_O – 8.24
Kohms
Polaris Series, Page 6
WWW.GALAXYPWR.COM
Part No. 99–003 Rev. 1.0