TDK iQM Series manual = 5.11⋅

Data Sheet: SuperetaTM iQM Series –Single Output Quarter Brick

Vin	(+)
On/	Off
Vin(-)

On/Off Circuit for positive or negative logic

Output Voltage Adjustment: The output voltage of the module may be adjusted by using an external resistor connected between the trim pin 6 and either the Sense

(+)or Sense (-) pin. If the voltage trim feature is not used, pin 6 should be left open. Care should be taken to avoid injecting noise into the module’s trim pin. A small 0.01uF capacitor between the power module’s trim pin and Sense (-) pin may help to avoid this.

With a resistor between the trim pin and Sense (-) pin, the output voltage is adjusted down. To adjust the output voltage down a percentage of Vout (∆%) from Vo,nom, the trim resistor should be chosen according to the following equation:

Rdown = 5.11⋅ (	100	− 2)	(kΩ)
	∆%

Where

∆%=100⋅(Vo,nom - Vdesired) / Vo_nom

The current limit set point does not increase as the module is trimmed down, so the available output power is reduced.

Vout(+)

Sense(+)

Trim

Rdown

Sense(-)

Vout(-)

Circuit to decrease output voltage

	10000
(k Ω )	1000
R e sista nce
	100
T rim
	10
	0	2	4	6	8	10	12	14	16	18	20

% Decrease in Output Voltage, ∆ (%)

With a resistor between the trim pin and sense (+) pin, the output voltage is adjusted up. To adjust the output voltage up a percentage of Vout (∆%) from Vo,nom the trim resistor (in kΩ) should be chosen according to the following equation:

R = 5.11⋅ (	V0,nom ⋅ (100 + ∆%)	−	100	− 2)
up	Vref ⋅ ∆%		∆%

©2004-2006 TDK Innoveta Inc.	℡ (877) 498-0099	12/15
iQM 1.5V/70A Datasheet 8/4/2006