SPIDER
SPI Driver for Enhanced Relay Control
TLE7238SL
SPI Driver for Enhanced Relay Control
Data Sheet
Rev. 1.1, 2011-04-05
Automotive Power
SPI Driver for Enhanced Relay Control
TLE7238SL
Table of Contents
Table of Contents
Table of Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1
2
2.1
3
3.1
3.2
4
4.1
4.2
4.3
5
5.1
5.2
6
6.1
6.2
6.3
6.4
6.5
6.6
7
7.1
7.2
7.3
7.4
7.5
7.6
8
8.1
8.2
9
9.1
9.2
9.3
9.4
9.5
9.6
10
11
12
Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pin Configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
l Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Characteristics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
10
11
12
Power Supply
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power Stages
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Channels 4 and 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inductive Output Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protection Functions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over Load Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over Temperature Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ESD protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reverse Polarity Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss of
V
bb
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
15
15
16
17
18
19
20
20
20
20
20
20
21
Diagnostic Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Command Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Serial Peripheral Interface (SPI)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPI Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daisy Chain Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPI Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
26
27
28
29
30
31
Package Outlines
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Application Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Revision History
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Data Sheet
2
Rev. 1.1, 2011-04-05
SPI Driver for Enhanced Relay Control
TLE7238SL
TLE7238SL
1
Features
•
•
•
•
•
•
Overview
8 bit SPI for diagnostics and control, providing daisy chain capability
Very wide range for digital supply voltage
Two configurable input pins offer complete flexibility for
PWM operation
Stable behavior at under voltage
Green Product (RoHS compliant)
AEC Qualified
PG-SSOP-24-5
Description
The TLE7238SL is an eight channel high-side and low-side power switch in PG-SSOP-24-5 package providing
embedded protective functions. It is especially designed for standard relays and LEDs in automotive applications.
The output stages incorporate two low-side, four high-side and two auto configuring high-side or low-side
switches.
A serial peripheral interface (SPI) is utilized for control and diagnosis of the device and the load. For direct control,
there are two input pins available.
The power transistors are built by N-channel power MOSFETs. The device is monolithically integrated in
Smart Power Technology.
Type
TLE7238SL
Data Sheet
Package
PG-SSOP-24-5
3
Marking
TLE7238SL
Rev. 1.1, 2011-04-05
SPI Driver for Enhanced Relay Control
TLE7238SL
Overview
Table 1
Product Summary
Operating range power supply voltage
Digital supply voltage
Typical On-State resistance at 25
°C
high-side: 2 channels (Relay)
high-side: 2 channels (Generic, LED)
auto configuring: 2 channels (Relay, Supplies)
low-side: 2 channels (Relay)
Nominal load current (all channels active)
Relay
LED, Generic
Over load switch off threshold
Output leakage current per channel at 25
°C
Drain to source clamping voltage
Source to ground clamping voltage
SPI clock frequency
Protective Functions
•
•
•
Over load and short circuit protection
Thermal shutdown
Electrostatic discharge protection (ESD)
V
bb
V
DD
R
DS(ON)
5.5 … 28 V
3.0 … 5.5 V
0.9
Ω
1.6
Ω
0.9
Ω
0.9
Ω
I
L(nom, min)
260 mA
130 mA
I
DS(OVL, min)
I
DS(OFF, max)
V
DS(CL, min)
V
bb(CL, max)
f
SCLK(max)
500 mA
1
µA
41 V
-40 V
5 MHz
Diagnostic Functions
•
•
•
•
Latched diagnostic information via SPI
Open load detection in OFF-state
Over load detection in ON-state
Over temperature
Limp Home / Fail-Safe Functions
•
•
Limp home activation via pin LHI
Limp home configuration via input pins
Applications
•
•
•
Especially designed for driving relays and LEDs in automotive applications
All types of resistive and inductive loads
Suitable to switch 5 V power supply lines by auto configuring channels
Data Sheet
4
Rev. 1.1, 2011-04-05
SPI Driver for Enhanced Relay Control
TLE7238SL
Overview
Detailed Description
The TLE7238SL is an eight channel high-side and low-side relay switch providing embedded protective functions.
The output stages incorporate two low-side switches (0.9
Ω
per channel), four high-side switches (two channels
with 0.9
Ω
and two channels with 1.6
Ω)
and two auto-configuring high-side or low-side switches (0.9
Ω
per
channel). The auto-configuring switches can be utilized in high-side or low-side configuration just by connecting
the load accordingly. They are also suitable to switch a 5 V supply line in high-side configuration. Protective and
diagnostic functions adjust automatically to the chosen configuration.
The 8 bit serial peripheral interface (SPI) is utilized for control and diagnosis of the device and the loads. The SPI
interface provides daisy chain capability in order to assemble multiple devices in one SPI chain by using the same
number of micro-controller pins.
Furthermore, the TLE7238SL is equipped with two input pins that can be individually routed to the output control
of each channel thus offering complete flexibility in design and PCB-layout. The input multiplexer is controlled via
SPI.
In limp home mode (fail-safe mode), the input pins are directly routed to the configurable output channels 4 and
5. The limp home mode operates independently of digital power supply and is activated via pin LHI.
The device provides full diagnosis of the load via open load, over load and short circuit detection. SPI diagnosis
flags indicate latched fault conditions that may have occurred.
Each output stage is protected against short circuit. In case of over load, the affected channel switches off. There
are temperature sensors available for each channel to protect the device against over temperature.
The device protects itself with a built in reverse polarity protection which prohibits intrinsic current flow through the
logic during reverse polarity. However the output stages still incorporate a reverse diode where current can flow
through during reverse polarity.
The power transistors are built by N-channel power MOSFETs. The inputs are ground referenced CMOS
compatible. The device is monolithically integrated in Smart Power Technology.
Data Sheet
5
Rev. 1.1, 2011-04-05
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