TLE7237SL Infineon Technologies, TLE7237SL Datasheet - Page 15

• Manufacturer Part Number: TLE7237SL
• Description: IC DRIVER SPI RELAY CTRL 24SSOP
• Manufacturer: Infineon Technologies
• Series: -r
• Type: High Side/Low Side Driverr

Specifications of TLE7237SL

• Input Type: SPI
• Number Of Outputs: 8
• On-state Resistance: 900 mOhm, 1.6 Ohm
• Current - Output / Channel: 175mA, 380mA
• Current - Peak Output: 500mA, 1A
• Voltage - Supply: 9 V ~ 16 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP (0.154", 3.90mm Width)
• Packages: PG-SSOP-24
• Channels: 8.0
• Rds (on) (typ): 0.9 Ohm
• Vdd: 3.0 - 5.5 V
• Vds(cl): 41.0 - 52.0 V
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6
The TLE7237SL is an eight channel high-side and low-side relay switch. The power stages are built by N-channel
vertical power MOSFET transistors. The gates of the high-side switches are controlled by charge pumps.
6.1
There are three input pins available at TLE7237SL, which can be configured to be used for control of the output
stages. The INXn parameter of the input configuration register provide following possibilities:
•
•
•
•
Figure 4
Figure 4
The current sink to ground ensures that the channels switch off in case of open input pin. The zener diode protects
the input circuit against ESD pulses.
6.2
The TLE7237SL provides two auto-configuring high-side or low-side switches (channels 4 and 5). They adjust the
diagnostic and protective functions according their potentials at drain and source automatically.
In high-side configuration, the load is connected between ground and source of the power transistors (S4 or S5).
The drain of the power transistors (D4 and D5) can be connected to any potential between GND-pin potential and
VBB-pin potential. When the drain is connected to VBB, the channel behave like the other high side channels. The
drain can also be connected to a 5 V power supply and the source pin will be utilized as switched 5 V supply line.
In low-side configuration, the source of the power transistors are to be connected to GND.
The configuration can be chosen for each of these channels individually, so it is feasible to connect one channel
in low-side and the other in high-side configuration.
Data Sheet
channel is switched off
channel is switched according to signal level at input pin IN1
channel is switched according to signal level at input pin IN2or IN3
channel is switched on
shows the input circuit of TLE7237SL.
Power Stages
Input Circuit
Input Multiplexer
Channels 4 and 5
IN1
IN2
IN3
I
I
I
IN1
IN2
IN3
0
1
0
1
INX0
INX1
Channel 0
Channel 1
Channel 2
Channel 3
15
Channel 4
Channel 5
Channel 6
Channel 7
SPI Driver for Enhanced Relay Control
InputLogic3in .emf
Rev. 1.1, 2011-04-05
Power Stages
TLE7237SL