BTS7970B データシートの表示（PDF） - Infineon Technologies
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BTS7970B Datasheet PDF : 28 Pages
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High Current PN Half Bridge
BTS 7970B
Block Description and Characteristics
IN pin are ignored. However, the INH pin can still be used to switch both MOSFETs off.
After tCLS the switches return to their initial setting. The error signal at the IS pin is reset
after 2 * tCLS. Unintentional triggering of the current limitation by short current spikes
(e.g. inflicted by EMI coming from the motor) is suppressed by internal filter circuitry. Due
to thresholds and reaction delay times of the filter circuitry the effective current limitation
level ICLx depends on the slew rate of the load current dI/dt as shown in Figure 10
IL
IC L x
ICLx 0
tC LS
t
Figure 9 Timing Diagram Current Limitation (Inductive Load)
High Side Switch
Low SideSwitch
90
90
85
80
ICLH0
Tj = -40°C
T = 25°C
75
j
Tj = 150°C
70
65
80
ICLL0
70
Tj = -40°C
Tj = 25°C
Tj = 150°C
60
60
55
50
0
50 0
10 0 0
1500 2000
dIL/dt [A/ms]
50
0
50 0
10 0 0
1500 2000
dIL/dt [A/ms]
Figure 10 Current Limitation Level vs. Current Slew Rate dI/dt
Data Sheet
15
Rev. 2.0, 2006-05-09
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