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MC34931 Fiches technique(PDF) 7 Page - Freescale Semiconductor, Inc

No de pièce MC34931
Description  34931 Industrial
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Fabricant  FREESCALE [Freescale Semiconductor, Inc]
Site Internet  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC34931 Fiches technique(HTML) 7 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
7
34931
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
POWER OUTPUTS OUT1, OUT2
Output-ON Resistance(14), ILOAD = 3.0 A
VPWR = 8.0 V, TJ = 25 °C
VPWR = 8.0 V, TJ = 150 °C
VPWR = 5.0 V, TJ = 150 °C
RDS(ON)
120
235
325
m
Ω
Output Current Regulation Threshold
TJ < TFB
TJ ≥ TFB (Foldback Region - see Figure 9 and Figure 11)(13)
ILIM
5.2
6.5
4.2
8.0
A
High Side Short-circuit Detection Threshold (Short Circuit to Ground)(13)
ISCH
11
13
16
A
Low Side Short-circuit Detection Threshold (Short Circuit to VPWR)(13)
ISCL
9.0
11
14
A
Output Leakage Current(15), Outputs off, VPWR = 28 V
VOUT = VPWR
VOUT = Ground
IOUTLEAK
-60
100
μA
Output MOSFET Body Diode Forward Voltage Drop, IOUT = 3.0 A
VF
2.0
V
Overtemperature Shutdown(13)
Thermal Limit @ TJ
Hysteresis @ TJ
TLIM
THYS
175
12
200
°C
Current Foldback at TJ
(13)
TFB
165
185
°C
Current Foldback to Thermal Shutdown Separation(13)
TSEP
10
15
°C
HIGH SIDE CURRENT SENSE FEEDBACK
Feedback Current (pin FB sourcing current)(16)
IOUT = 0 mA
IOUT = 300 mA
IOUT = 500 mA
IOUT = 1.5 A
IOUT = 3.0 A
IOUT = 6.0 A
IFB
0.0
0.0
0.35
2.86
5.71
11.43
270
0.775
3.57
7.14
14.29
50
750
1.56
4.28
8.57
17.15
μA
μA
mA
mA
mA
mA
STATUS FLAG(17)
Status Flag Leakage Current(18)
VSF = 5.0 V
ISFLEAK
5.0
μA
Status Flag SET Voltage(19)
ISF = 300 µA
VSFLOW
0.4
V
Notes
13.
This parameter is Guaranteed By Design.
14.
Output-ON resistance as measured from output to
VPWR and from output to GND.
15.
Outputs switched OFF via D1 or EN/D2.
16.
Accuracy is better than 20% from 0.5 A to 6.0 A. Recommended terminating resistor value: RFB = 270 Ω.
17.
Status Flag output is an open drain output requiring a pull-up resistor to logic VDD.
18.
Status Flag Leakage Current is measured with Status Flag HIGH and not SET.
19.
Status Flag Set Voltage measured with Status Flag LOW and SET with ISF = 300 μA. Maximum allowable sink current from this pin is
<500
μA. Maximum allowable pull-up voltage < 7.0 V.
Table 3. Static Electrical Characteristics (continued)
Characteristics noted under conditions 5.0 V
≤ VPWR ≤ 28 V, -40 °C ≤ TA ≤ 85 °C, GND = 0 V, unless otherwise noted. Typical
values noted reflect the approximate parameter means at TA = 25 °C under nominal conditions, unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit


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