SAP15P Datasheet, PDF (4/6 Pages) Sanken electric – Darlington transistors with built-in temperature compensation diodes for audio amplifier applications

3. Characteristics of the temperature compensation diodes
The several temperature compensation diodes are connected in series, so the forward voltage is varied with
small current fluctuations. Therefore, in case the forward current flowing over the diodes is set at 2.5mA and
over, the forward voltage rises, and in the worst combinations, the idling current reaches to 40mA and over
with minimum VR of 0Ω. On the contrary, in case the forward current is set at 2.5mA or below, the idling
current may not reach to 40mA with maximum VR of 200Ω.
10.0
Ta = 25°C
PN-Di
SBD
(5 diodes Total)
PN–Di+SBD
5.0
1.0
0
500 1000 1500 2000 2500 3000
VF (mV)
IF – VF Characteristics
4. Parallel push-pull application
Adjustments of the idling current are required by each the resistor in parallel push-pull applications. One
side adjustment will cause the idling current to be unstable (seesaw operation) because of the different hFE.
To be adjusted individually