mc33984 Freescale Semiconductor, Inc, mc33984 Datasheet - Page 28

• Manufacturer Part Number: mc33984
• Description: Dual Intelligent High-current Self-protected Silicon High-side Switch 4.0 M
• Manufacturer: Freescale Semiconductor, Inc

corresponding to the worst case.
tolerance without battery variation effect.
described in
28
33984
OUTPUT CURRENT MONITORING
Lower VPWR Voltage causes more error. 9.0V
The main contributor is the manufacturing deviation, as
24000
23000
22000
21000
20000
19000
18000
17000
16000
24000
23000
22000
21000
20000
19000
18000
17000
16000
Figure 12. CSR0 ratio deviation in function all
Figure 13. CSR0 ratio deviation in function
Current Recopy at Vbat=9V from -40°C to 125°C
Current Recopy at Vbat=9V/16V from -40°C to
10
10
Min(Data_16V) at 6 sigmas
Figure
Max(Data_16V) at 6 sigmas
manufacturing and temperature
14. At 15A of output current, the
contributors
15
15
Output current (A)
Output current (A)
10%
125°C
Figure 13
Max(Data_9V) at 6 sigmas
Min(Data_9V) at 6 sigmas
20
20
shows the CSR0
Average (Data)
Spec_max
Spec_min
25
25
tolerance will be about 8.5% versus 10% when all
contributors are considered.
PART CALIBRATION
be removed.
(below 5.0A). The relative CSR0 deviation based on only one
calibration point per output (5.0A, VPWR=16V at 25°C) has
been performed on 3 production lots. Those parts have
tested at initial and after High Temperature Operating Life
test in order to take into account the ageing of devices.
Table 18. CSR0 Precision for Several Output Current
With a calibration strategy, the part to part contribution can
An experiment was done on low output current values
Table 18
24000
23000
22000
21000
20000
19000
18000
17000
16000
CSR0 ratio
Figure 14. CSR0 ratio deviation in function
10
0.5A
1.0A
2.5A
5.0A
summaries test results covering 99.74% of parts.
Values with One Calibration Point at 5.0A
Current Recopy at Vbat=9V at 25°C
manufacturing
Analog Integrated Circuit Device Data
15
Output current (A)
-8.0%
-5.0%
-25%
-12%
8.5%
Min
Freescale Semiconductor
Max(Data) at 6 sigmas
20
Min(Data) at 6 sigmas
Average (Data)
8.0%
5.0%
25%
12%
Max
Spec_max
Spec_min
25