33291L View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
Manufacturer
33291L Datasheet PDF : 26 Pages
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PIN
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
GE
VDD
OT
RB
SF
SFPD
OF
SFL
CS
SCLK
SI
SO
SPI
Interface
Logic
CSI
CSBI
Bias
Gate
Control
Open
Load
Detect
Short
Circuit
Detect
53 V
To Gates
1–7
lLimit
+
-
RS
Over-
temperature
Detect
From Detectors 1–7
Output 0
24
Outputs
1, 2, 11–14, 23
Grounds
5–8, 17–20
Figure 2. 33291L Simplified Block Diagram
Table 1. Fault Operation
SERIAL OUTPUT (SO) PIN REPORTS
Overvoltage
Overtemperature
Overcurrent
Output ON, Open Load Fault
Output OFF, Open Load Fault
Overvoltage condition reported.
Fault reported by Serial Output (SO) pin.
SO pin reports short to battery/supply or overcurrent condition.
Not reported.
SO pin reports output OFF open load condition.
DEVICE SHUTDOWNS
Overvoltage
Overtemperature
Overcurrent
Total device shutdown at VPWR = 28 V 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 overcurrent shuts down at 1.0 A to 3.0 A after a 70 μs 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).
33291L
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
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