MC33298 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
VPWR 21
+
10µA
25µA
+
10µA
Fault Timers
10µA +
10µA
Serial D/O
Line Driver
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
53V
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
Over-voltage
Over-voltage condition reported
Over-temperature
Fault reported by Serial Output (SO) pin
Over-current
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
Over-voltage
Total device shutdown at VPWR = 28 to 36V. 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 the over-voltage
shutdown voltage including hysteresis.
Over-temperature
Over-current
Only the output experiencing an over-temperature condition turns off.
Only the output experiencing an over-current condition shuts down at 3.0A to 6.0A after a 25ms to 100ms delay,
with SFPD pin grounded. All outputs will continue to operate in a current limit mode, with no shutdown, if the
SFPD pin is at 5.0V.
33298
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
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