Delta Electronics IPM24S0B0 manual Features Descriptions Con, Voltage Margining

FEATURES DESCRIPTIONS (CON.)

Figure 28: Trim up Circuit configuration for programming output voltage using an external resistor

Vout

Rtrim

Load

Trim

GND

Figure 29: Trim down Circuit configuration for programming

output voltage using an external resistor

Table 1 Rtrim is the external resistor in KΩ; Vout is the desired output voltage

		Rtrim setting (Ω)		Output
				Measurement
		R.trim_Up	R.trim_Down	0A
Vo	3.3	NC	NC	3.323V
Vadj	4.0	5.36K	NC	4.023V
Vadj	5.0	2.21K	NC	5.019V
Vadj	6.5	1.18K	NC	6.493V
Vadj	3.3*(1-10%)	NC	36.5K	2.984V

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 (Vo.set x Io.max ≤ P max).

Voltage Margining

Output voltage margining can be implemented in the IPM modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to the output pin for margining-down. Figure 32 shows the circuit configuration for output voltage margining. If unused, leave the trim pin unconnected.

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

Vin	Vo
IPM
On/Off	Trim
	Rtrim
	GND

Rmargin-down

Q1

Rmargin-up

Q2

electrical specification.

Figure 32: Circuit configuration for output voltage margining

DS_IPM24S0B0_03202007

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