I've run into another mystery part on the HP server PSU(HSTNS-PD43) I'm analyzing, and would be grateful for any advice.
Device(A7) as it sits on the auxiliary(side) PCB.
*Measured Body Dimensions: 2.1(L) x 1.25(W)mm
Surrounding Schematic
Notes: 1. Two BAS40 diodes were used in the schematic for the time being to show the A7's inner diodes' orientations according the multimeter tested results -> "common anode"(pin-2) diode pair with pins 1 & 3 being cathodes.
2. Cap values are unknown so they are all marked by "default" to 1uF.
As shown in the schematic above, my tests of the A7 (in circuit) using a multimeter in diode setting(& Ohm setting) revealed the following;
(PL=Positive Lead, NL=Negative Lead)
1. PL on Pin2 / NL on Pin1 = 0.508V (Resistance 1.336k) - (Seems like a good diode)
2. PL on Pin2 / NL on Pin3 = 0.508V (Resistance 1.336k) - (Seems like a good diode)
3. Pin1 & Pin3 connected to GROUND.
But I noticed the following as well ...
4. NL on Pin2 / PL on Pin1 = 0.188V* (Resistance 515 Ohm) - (What the hell is goin' on here?)
5. NL on Pin2 / PL on Pin3 = 0.188V* (Resistance 515 Ohm) - (What the hell is goin' on here?)
*not showing as "OL" in the multimeter diode check(leads in reverse)
I've searched literally hundreds of diode arrays and noticed that the following types are available.
The closest type from the image above would be the one in "Fig.33 - SERIES(Rev)" as pins 1 and 3 are connected to cathodes, but as the diodes are in series it would not explain the fact that the resistance between pins 1+2 and 2+3 are both 1.336k - same.
I'm wondering if this A7 device is not a diode array and perhaps something entirely different?
Any pointers would be appreciated. Cheers~