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L6470PD bảng dữ liệu(PDF) 28 Page - STMicroelectronics

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L6470PD bảng dữ liệu(HTML) 28 Page - STMicroelectronics

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Functional description
L6470
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Doc ID16737 Rev 5
must be placed as close as possible to the pins. Refer to Table 8 for the choice of load
capacitor values according to the external oscillator frequency.
If a direct clock source is used, it must be connected to the OSCIN pin and the OSCOUT pin
supplies the inverted OSCIN signal (see Figure 12).
Figure 12.
OSCIN and OSCOUT pin configuration
Note:
When OSCIN is UNUSED, it should be left floating.
When OSCOUT is UNUSED, it should be left floating.
6.9
Overcurrent detection
When the current in any of the Power MOSFETs exceeds a programmed overcurrent
threshold, the STATUS register OCD flag is forced low until the overcurrent event has
Table 8.
CL values according to external oscillator frequency
Crystal/resonator freq. (1)
1.
First harmonic resonance frequency.
CL
(2)
2.
Lower ESR value allows the driving of greater load capacitors.
8 MHz
25 pF (ESRmax = 80 Ω)
16 MHz
18 pF (ESRmax = 50 Ω)
24 MHz
15 pF (ESRmax = 40 Ω)
32 MHz
10 pF (ESRmax = 40 Ω)



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