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ZAMC4100GA2R 데이터시트(PDF) 62 Page - Renesas Technology Corp

부품명 ZAMC4100GA2R
상세설명  Actuator and Motor Controller
PDF  156 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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ZAMC4100 Datasheet
© 2016 Integrated Device Technology, Inc.
62
January 26, 2016
Case B: The over-current event occurs and then is resolved after 10µs. The counter will increment for
10µs and then decrement for 10µs until its value is back to zero.
Case C: There are three consecutive over-current events of 10µs duration with 5µs intervening pauses. In
this case, the counter increments for 10µs, then decrements for 5µs, again increments for 10µs
and so on. The process continues until the counter value reaches 20µs, the interrupt flag is set,
and the MOSFET is disabled.
Case C shows the main idea of the counter integrator concept: consecutive over-current events with a duration
shorter than 20µs are integrated over the time period and can set the over-current flag, which disables the driver.
This guarantees no chip overheating in the case of frequent over-current events shorter than 20µs.
Figure 3.13 Operation Principle of Over-Current Counter Integrator
0
10
20
30
40
50
60
70
90
110
t [µs]
HS or LS Over-
Current Event
0
10
20
30
40
50
60
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80
90
100
110
t [µs]
OC Counter
(integrator)
0
10
20
30
40
50
60
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110
t [µs]
HBxOCIF
HBxOCIF clear
20µs
100
80
Case A
Case B
Case C
Note: One counter step = 250ns
10µs
10µs
5µs
15µs
10µs
20µs



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