TDK-Lambda PH Series, Manual, Page: 38 / 58

PH
50
-
150, 75
-
300F
PH
B-336
・All specifications are subject to change without notice.
0 35 40 45 50 55
90
100
110
120
＜４８VDC Input＞
＜24VDC Input＞
0 80 90 100 110 120
90
100
110
120
＜110VDC Input＞
0 200 220 240 260 280
90
100
110
120
＜２８０VDC Input＞
Figure2-5:Limitation of Input Voltage
0 18 20 22 24 26
90
100
110
120
Input Voltage (VDC)
Input Voltage (VDC)
Input Voltage (VDC)
Input Voltage (VDC)
Output Voltage (%)
Output Voltage (%)
Output Voltage (%)
Output Voltage (%)
Figure2-5: Limitation of Input Voltage
0
5
10
40 60 80 100 120
Output Voltage (％)
図２−６ 最小出力電流値の制限
＋V
＋S
−V
−S
TRM
VR
＋
＋
−
Load
図２−７ 外付け抵抗の接続例
R1
Minimum Load Current (%)
Figure2-6: Minimum Output Current Limit
Resistance values and connection method of external re-
sistor and variable resistor are shown as follows.
In this case, variable resistor is attached as remote pro-
gramming resistor, and the output can be remotely pro-
grammed. Also, aside from remote programming resistor,
remote programming can be done externally by voltage
source.
R1
VR
2V
20k
2k
3V
20k
2k
5V
3.3k
20k
12V
3.3k
50k
15V
3.3k
50k
24V
3.3k
100k
28V
3.3k
100k
R1: ±5% Tolerance
VR: ±20% Total Tolerance below 1% End Resistance
Table2-3: Values of External Resistor and Variable Resistor
(-60 to +20% Output Voltage Change ; ±20% for 2V 3V)
R1
VR
2V
43k
1k
3V
43k
1k
5V
43k
2k
12V
43k
5k
15V
43k
5k
24V
43k
10k
28V
43k
10k
R1: ±5% Tolerance
VR:
±20% Total Tolerance End Resistance below 1%
Table2-4 : Values of External Resistor and Variable Resistor
(±10% Output Voltage Change)
0
5
10
40 60 80 100 120
Output Voltage (％)
図２−６ 最小出力電流値の制限
＋V
＋S
−V
−S
TRM
VR
＋
＋
−
Load
図２−７ 外付け抵抗の接続例
R1
Minimum Load Current (%)
Figure2-7: Connection Example of External Resistor
In the same way, remote sensing wires can be connected
to load terminal input.
〈Changing Output Voltage by Applying External Reference
Voltage; F type only〉
On F type power module, the output voltage can be ad-
justed within the same range as remote programming with
variable resistor by applying external voltage to TRM termi-
nal. The output voltage for this case can be calculated by
the following equation.
Output Voltage＝TRM Voltage × Nominal Output Voltage
〈Reference〉Trim Circuit
Voltage Detection
Amplifier
15kΩ(TYP)
10kΩ 1kΩ
＋S
2.495V
Standard
Voltage
−S
TRM
図２−8 トリム回路構成
Figure2-8: Network of Trim Circuit
Reference voltage for Voltage Detection Amplifier is the
TRM terminal voltage. When TRM terminal is 1.0V (TYP),
output is nominal voltage.
For other applications not described here, use this value
as a reference when selecting external component values.
〈Application Example of External Voltage〉
＋V
＋S
−V
−S
TRM
＋
＋
−
Load
図２−９ 外部電圧可変の応用例
Externally
Applied
Voltage
〈外部電圧可変の応用例〉
＋
−
Figure2-9: Example of Applied Voltage
3 MAXIMUM OUTPUT RIPPLE & NOISE
The maximum output ripple and noise are measured by the
following prescribed method based on JEITA RC-9141.
The connection is shown in Figure3-1. Attach a film ca-
pacitor (1μF) to a point 50mm from the output terminal.
Then attach a coaxial cable with JEITA attachment to both
sides of the film capacitor as shown in Figure3-1. Oscillo-
scope shall be set at 100MHz band width.