TLE7238GS Infineon Technologies, TLE7238GS Datasheet - Page 21

• Manufacturer Part Number: TLE7238GS
• Description: IC DRIVER SPI 8CH HS/LS 24-SSOP
• Manufacturer: Infineon Technologies
• Type: High Side/Low Side Driverr

Specifications of TLE7238GS

• Input Type: SPI
• Number Of Outputs: 8
• On-state Resistance: 900 mOhm
• Current - Peak Output: 1A
• Voltage - Supply: 9 V ~ 28 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• Other names: SP000297868

7
The device provides embedded protective functions. Integrated protection functions are designed to prevent IC
destruction under fault conditions described in this data sheet. Fault conditions are considered as “outside” normal
operating range. Protection functions are not designed for continuous repetitive operation.
7.1
The TLE7238GS is protected in case of over load or short circuit of the load. After time
channel n switches off and the according diagnosis flag Dn is set. The channel can be switched on after clearing
the protection latch by command CMD.CPL = 1. The CPL command clears itself with the next valid SPI
communication frame. Please refer to
Figure 7
7.2
A temperature sensor for each channel causes an overheated channel to switch off to prevent destruction. The
according diagnosis flag is set. This flag is also set in OFF state, if the regarding channel temperature is too
high.The channel can be only switched on after clearing the protection latch by SPI command CMD.CPL = 1. The
CPL command clears itself with the next valid SPI communication frame. Please refer to
on Page 23
7.3
There is a designed in protection against ESD disturbances up to the specified limit by using the defined model.
Please see electrical characteristics
7.4
There is a reverse polarity protection implemented in the TLE7238GS. This protection has to be divided into two
parts. First the protection of the control circuits and second in the protection of the power transistors.
The control circuits are reverse polarity protected by protective measures in the ground connection. In case of
reverse polarity, there is no current flow through the control circuits. To ensure this functionality, the GND pin and
the substrate connections SUB must not be connected to the same potential. This means, the copper area
dedicated for cooling will be connected at SUB and needs to be electrically isolated from GND.
The digital pins need serial resistors if the connected input stages are not floating to ground.
The power transistors contain intrinsic body diodes that cause power dissipation. The reverse current through
these intrinsic body diodes has to be limited by the connected loads. The over temperature and over load
protection are not active during reverse polarity.
7.5
In case of loss of
ground connection or through an additional path from
Figure 14 “Application Diagram” on Page
Data Sheet
for information on diagnosis features.
Protection Functions
Over Load Protection
Shut Down at Over Load
Over Temperature Protection
ESD protection
Reverse Polarity Protection
Loss of V
V
bb
connection in on-state, all inductances of the loads have to be demagnetized through the
I
D0(OV L)
I
bb
IN
D0
t
OFF(OV L)
“ESD susceptibility on all pins” on Page 11
Figure 7
D0 = 1
b
35) can be placed.
for details.
21
V
CPL = 1
D0 = 00
bb
to ground. Then for example, a diode (see D2 in
b
b
t
t
OverLoad.emf
t
OFF(OVL)
“Diagnostic Features”
Protection Functions
Rev. 1.0, 2008-10-30
, the over loaded
TLE7238GS