MC33341 Просмотр технического описания (PDF) - Motorola => Freescale
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MC33341 Datasheet PDF : 20 Pages
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MC33341
Figure 1. Voltage Sensing
Threshold Change versus Temperature
4.0
VCC = 6.0 V
0
Figure 2. Current Sensing
Threshold Change versus Temperature
1.0
VCC = 6.0 V
0
–4.0
–8.0
–12
–50 –25
0
25
50
75 100 125
TA, AMBIENT TEMPERATURE (°C)
–1.0
–2.0
1 – Source High–Side and Load High–Side
2 – Source Return Low–Side
3 – Load Low–Side
–3.0
–50 –25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
3
2
1
100 125
Figure 3. Closed–Loop Voltage Sensing Input
versus Voltage Threshold Adjust
1.6
16
1.4
VCC = 6.0 V
VO = 1.0 V
14
1.2
IO = 1.0 mA
TA = 25°C
12
1.0
10
0.8
VPin 5
8.0
0.6
6.0
0.4
4.0
0.2
VPin 6–VPin 5
2.0
0
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
VPin 6, VOLTAGE THRESHOLD ADJUST (V)
Figure 4. Closed–Loop Current Sense Input B
versus Current Threshold Adjust
0
0
–40
VCC
2.0
VPin 1–VPin 6
–80
VCC = 6.0 V 4.0
–120
VPin 6
VO = 1.0 V
IO = 1.0 mA 6.0
Pin 1 = VCC
–160
TA = 25°C 8.0
–200 Differential Amplifier is active for
–240
source high–side and load high–side
current sensing. Both vertical axis are
expressed in millivolts down to VCC.
–280
0
40
80 120 160 200 240
VPin 2, CURRENT THRESHOLD ADJUST (V)
10
12
14
280
Figure 5. Closed–Loop Current Sensing Input A
versus Current Threshold Adjust
280
14
Noninverting input path is active
240 for load low–side current sensing.
12
200
VCC = 6.0 V
VO = 1.0 V
10
IO = 1.0 mA
160 TA = 25°C
8.0
120
6.0
VPin 5
80
4.0
VPin 2–VPin 1
40
Gnd
2.0
0
0
0
40
80 120 160 200 240 280
VPin 2, CURRENT THRESHOLD ADJUST (mV)
Figure 6. Closed–Loop Current Sensing Input A
versus Current Threshold Adjust
0
14
–40
Gnd
VPin 5
–80
VCC = 6.0 V
VO = 1.0 V 12
IO = 1.0 mA
TA = 25°C 10
–120
8.0
–160
6.0
–200
–240
–260
0
VPin 2–|VPin 1|
40
80 120
4.0
Inverting Amplifier is
active for source return 2.0
low–side current sensing.
0
160 200 240 280
VPin 2, CURRENT THRESHOLD ADJUST (mV)
4
MOTOROLA ANALOG IC DEVICE DATA
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