Photo IC diodes

S7183, S7184

7

Operating voltage, output characteristics

(external resistor)

Photo IC

diode

Rin=150 Ω ± 20%

(internal protection resistor)

Vcc

KPICC0128EC

[Figure 1] Measurement circuit example

Figure 2 shows the photocurrent vs. reverse voltage characteristics (light source: LED) for the measurement circuit example in Figure

1. The output curves are shown for illuminance levels. The output curves rise from a reverse voltage (rising voltage) of approximately 0.7

V (±10%).

when the photo IC diode is saturated is the sum of Vbe(ON) and the voltage drop across the protection resistor Rin [Equation (1)].

indicated as load lines in Figure 2.

In Figure 2, the intersections between the output curves and the load lines are the saturation points. From these points, the maximum

adjust them according to the operating conditions.

Note: The temperature characteristics of Vbe(ON) is approximately -2 mV/°C, and that of the protection resistor is approximately

0.1%/°C.