AN4402 datasheet(31/39 Pages) STMICROELECTRONICS

部件名	AN4402

功能描述	Multichannel drivers driving inductive loads

PDF	39 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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31 / 39 page

DocID025557 Rev 1

31/39

AN4402

Energy capability and load compatibility

Figure 18. EDEMAG_MAX vs tDEMAG for repetitive pulse TJSTART = 100°C

However, the data provided by the datasheet for repetitive pulse conditions at

TJSTART = 100 °C have demagnetization times which are longer than 4.2 ms (calculated in

step1).

Another possibility to calculate EDEMAG_MAX for a given tDEMAG consists in using the empiric

property:

is constant.

For example, using the first row of Table 14, we have:

Table 14. EDEMAG_MAX and corresponding tDEMAG for a repetitive pulse with

TJSTART = 100 °C, RL = 0 Ω, VBAT = 13.5 V

[mH]

IL0

[A]

TDEMAG [ms]

RL=0Ω VBAT=13.5V

EDEMAG_MAX [mJ]

RL=0Ω VBAT=13.5V

400

0.434

7.9

500

0.430

9.8

600

0.425

11.6

700

0.421

13.4

DEMAG_MAX

DEMAG

------------------------------------

DEMAG_MAX2

DEMAG_MAX1

DEMAG2

DEMAG1

------------------------

4.2

7.9

--------

⋅

43.7mJ

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