L4995 데이터 시트보기 (PDF) - STMicroelectronics
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L4995 Datasheet PDF : 35 Pages
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L4995
Electrical specifications
Table 7. Watchdog
Pin Symbol
Parameter
Test condition Min. Typ. Max. Unit
Wi
Vih Input high voltage
VS = 13.5V
Wi
Vil Input low voltage
VS = 13.5V
Wi
Vih Input hysteresis
Wi
Iwi
Pull down current
Vcw
Vwlth Low threshold
VS = 13.5V
VS = 13.5V
Vwi = 3.5V
VS = 13.5V
Vcw
Vwhth High threshold
VS = 13.5V
Vcw
Icwc Charge current
VS = 13.5V,
Vcw = 0.1V
Vcw
Icwd Discharge current
VS = 13.5V,
Vcw = 2.5V
Vcw
Twop Watchdog period
VS = 13.5V,
Ctw = 47nF
Res
twol
Watchdog output low time VS = 13.5V,
Ctw = 47nF
3.5
V
1.5
V
500
mV
6 10 µA
10% 13% 16% Vo_ref
44% 47% 50% Vo_ref
5 10 20 µA
1.25 2.5 5
µA
20 40 80 ms
4 8 16 ms
Table 8. Enable
Pin Symbol
Parameter
Test condition Min. Typ. Max. Unit
En
VEn_low En input low voltage
En
VEn_high En input high voltage
En
VEn_hyst En input hysteresis
En
IEn
Pull down current
VS = 13.5V
1
V
3
V
830
mV
10 18 µA
Doc ID 13103 Rev 13
11/35
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