TLE7234SE Infineon Technologies, TLE7234SE Datasheet - Page 13

• Manufacturer Part Number: TLE7234SE
• Description: IC DRIVER SPI RELAY CTRL DSO20
• Manufacturer: Infineon Technologies
• Series: -r
• Type: High Side/Low Side Driverr

Specifications of TLE7234SE

• Input Type: SPI
• Number Of Outputs: 8
• On-state Resistance: 850 mOhm, 1.6 Ohm
• Current - Output / Channel: 205mA, 410mA
• Current - Peak Output: 500mA, 1A
• Voltage - Supply: 9 V ~ 16 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Packages: PG-DSO-20
• Channels: 8.0
• Rds (on) (typ): 0.85 Ohm
• Vdd: 3.0 - 5.5 V
• Vds(cl): 41.0 - 52.0 V
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5
The TLE7234SE is supplied by two supply voltages
and used by the power switches and by an integrated power supply for the register banks. There is an under
voltage reset function implemented for the
threshold. After start-up of the power supply, all SPI registers are reset to their default values and the device is in
sleep mode (standby). Sending the SPI command CMD.WAKE = 1 switches the device to operation mode (ON),
while a command CMD.STB = 1 send the device to sleep mode (standby) again. Please note that the device
needs the time
CMD.WAKE = 1 before this time is elapsed. A SPI frame send during
The
result, the daisy chain function is available as soon as
A capacitor between pins
Please see
The device provides a sleep mode (stand by) to minimize current consumption, which also resets the register
banks. It is entered and left by dedicated SPI commands or by turning off the VDD supply.
The following table shows the operation modes depending on
Operation Modes
VBB
VDD
Switches operating
SPI & daisy-chain
Register Banks
Diagnostic functions
5.1
There are several reset trigger implemented in the device. A reset switches off all channels and sets the registers
to default values. After any kind of reset, the transmission error flag (TER) is set and the device is in sleep mode.
Under Voltage Reset:
During this device condition a read on SPI delivers the Standard Diagnostic Frame with a TER flag, if
the under voltage threshold already, if not SPI is not working.
This under voltage reset is released when
Reset Command: There is a reset command available to reset all register bits of the register bank and the
diagnosis registers. As soon as CMD.RST = 1, a reset is triggered.
Data Sheet
V
DD
supply line is used to power the circuitry related to the SPI shift register and for driving the SO line. As a
Figure 14 “Application Diagram” on Page 34
Power Supply
Reset
t
wu(Sleep)
to initialize itself. No SPI command should be send after changing the power state via
V
DD
and GND is recommended (especially in case of EMI disturbances).
0 V
0 V
-
-
reset
-
V
V
DD
bb
and
power supply, which is triggered if
0 V
5 V
-
reset
-
V
V
bb
bb
V
and
supply voltage levels are above under voltage threshold.
13
DD
is provided in the specified range independent of
12 V
0 V
-
V
for details.
DD
V
SPI Driver for Enhanced Relay Control
. The
bb
,
V
DD
V
t
12 V
5 V
bb
wu(Sleep)
.
supply line is connected to a battery feed
could be ignored.
V
bb
is below the undervoltage
Rev. 1.1, 2011-04-05
Power Supply
TLE7234SE
V
DD
is above
V
bb
.