S5855A datasheet(14/27 Pages) SII

Part #	S5855A

Description	PWM OUTPUT TEMPERATURE SENSOR IC

PDF	27 Pages

Scroll/Zoom	100%

Manufacturer	SII [Seiko Instruments Inc]

Direct Link	http://www.sii.co.jp

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14 / 27 page

PWM OUTPUT TEMPERATURE SENSOR IC

S-5855A Series

Rev.1.2_00

Seiko Instruments Inc.

Explanation of Terms

Duty ratio accuracy (Dsp5)

Dsp5 shows duty ratio in temperature TSP5 5

°C higher than duty ratio change-start temperature TS.

Ta [°C]

100 %

TS TSP5

Dsp

5°C

Duty ratio [%]

Figure 12

2. Duty ratio temperature sensitivity (Ddt(E))

Duty ratio temperature sensitivity (Ddt(E)) is the temperature coefficient of duty ratio calculated from the output duty

ratio at Ta = TSP5 and Ta = TEM5. TEM5 is the temperature decided for each product shown in Table 11, and Dem5 is

the output duty ratio at Ta = TEM5. Ddt(E) is calculated using the following formula.

Ddt(E) = (Dem5

− Dsp5) / (TEM5 − TSP5) [%/°C]

Ta [°C]

100%

TS TSP5

Dsp

TEM5

Dem

Ddt(E)

Duty ratio [%]

*1.

Selectable from

−1 %/°C to −4 %/°C in 1 %/°C step

Figure 13

S5855A Datasheet(PDF) 14 Page - Seiko Instruments Inc