Delta Electronics Delphi IPM24S0B0 Specification Sheet page 9

FEATURES DESCRIPTIONS (CON.)
Figure 28: Trim up Circuit configuration for programming
output voltage using an external resistor
Vout
Trim
GND
Figure 29: Trim down Circuit configuration for programming
output voltage using an external resistor
Figure 30: Circuit configuration for programming output voltage
using external voltage source
Table 1 provides Rtrim values required for some common
output voltages. By using a 0.5% tolerance resistor, set
point tolerance of ±2% can be achieved as specified in the
electrical specification.
DS_IPM24S0B0_03202007
Rtrim
Load
Table 1 Rtrim is the external resistor in KΩ;
Vout is the desired output voltage
Rtrim setting (Ω)
R.trim_Up R.trim_Down
NC
Vo 3.3
5.36K
Vadj 4.0
2.21K
Vadj 5.0
1.18K
Vadj 6.5
NC
Vadj 3.3*(1-10%)
The amount of power delivered by the module is the
voltage at the output terminals multiplied by the output
current. When using the trim feature, the output voltage
of the module can be increased, which at the same
output current would increase the power output of the
module. Care should be taken to ensure that the
maximum output power of the module must not exceed
the maximum rated power (
Voltage Margining
Output voltage margining can be implemented in the IPM
modules by connecting a resistor, R
pin to the ground pin for margining-up the output voltage
and by connecting a resistor, R
to the output pin for margining-down. Figure 32 shows
the circuit configuration for output voltage margining. If
unused, leave the trim pin unconnected.
Vo
Vin
IPM
Trim
On/Off
Rtrim
GND
Figure 32: Circuit configuration for output voltage margining
Output
Measurement
0A
3.323V
NC
4.023V
NC
5.019V
NC
6.493V
NC
2.984V
36.5K
.
Vo.set x Io.max ≤ P max
)
, from the Trim
margin-up
, from the Trim pin
margin-down
Rmargin-down
Q1
Rmargin-up
Q2
9