MC33298(2006) View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
Manufacturer
MC33298 Datasheet PDF : 28 Pages
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INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VDD
16
SFPD
15
RST
22
CS
10
SCLK
3
SI
4
SO
9
+
10 µA
25 µA
+
10 µA
Fault Timers
10 µA +
10 µA
Serial D/O
Line Driver
VPWR 21
Over
Voltage
Voltage
Regulator
OVD
VDD
RB
SFPD
SFL
CS
SCLK
SI
SO
CSI
CSBI
GE
OT
SF
OF
SPI
Interface
Logic
Bias
Gate
Control
Open
Load
Detect
Short
Circuit
Detect
53 V
To Gates
1 to 7
lLimit
+ RS
–
Over
Temperature
Detect
From Detectors 1 to 7
OUTPUT 0
24
OUTPUT
1 to 7
2
11 - 14
23
GND 5-8
17-20
Figure 2. 33298 Simplified Block Diagram
Table 1. Fault Operation
SERIAL OUTPUT (SO) PIN REPORTS
Overvoltage
Overvoltage condition reported
Overtemperature
Fault reported by Serial Output (SO) pin
Overcurrent
SO pin reports short to battery/supply or over current condition
Output ON, Open Load Fault Not reported
Output OFF, Open Load Fault SO pin reports output OFF open load condition
DEVICE SHUTDOWNS
Overvoltage
Overtemperature
Overcurrent
Total device shutdown at VPWR = 28 to 36 V. All outputs are latched off while the SPI register is reset (cleared).
Outputs can be turned back on with a new SPI command after VPWR has decayed below 26.5 V.
Only the output experiencing an overtemperature condition turns off.
Only the output experiencing an over current shuts down at 1.0 to 3.0 A after a 70 to 250 µs delay, with SFPD
pin grounded. All other outputs will continue to operate in a current limit mode, with no shutdown, if the SFPD
pin is at 5.0 V (so long as the individual outputs are not experiencing thermal limit conditions).
33298
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
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