Data Sheet
,
Rev. 1.1
,
Jan. 2009
TLE 7241E
Dual Channel Constant Current
Control Solenoid Driver
Automotive Power
TLE 7241E
Table of Contents
Table of Contents
Table of Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1
1.1
1.2
1.3
2
3
4
4.1
5
5.1
5.2
5.3
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.5
5.5.1
5.5.2
5.5.3
5.5.4
5.6
5.6.1
5.6.2
6
6.1
7
8
Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
3
4
4
Pin Configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Maximum Ratings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Functional Range
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Functional Description and Electrical Characteristics
. . . . . . . . . . . .
Supply and Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protection and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overvoltage Sensing and Protection . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overcurrent / Short to
V
BAT
Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . .
Open Load / Short to Ground Detection . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hysteretic Current Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dither Control and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Command Out of Range / Dither Clipping . . . . . . . . . . . . . . . . . .
Error Correction Registers / Average Switch Threshold Trimming . . . .
SPI Command and Diagnosis Structure . . . . . . . . . . . . . . . . . . . . . . . . . .
SPI Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPI Command Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
13
14
15
16
16
17
21
28
30
30
37
43
44
46
46
52
Application
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Layout Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Package Outlines
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Revision History
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Data Sheet
2
Rev. 1.1, 2009-01-19
Dual Channel Constant Current Control Solenoid
Driver
TLE 7241E
1
1.1
•
•
•
Overview
Features
PG-DSO-20-27
•
•
•
•
•
•
Two Fully Independent Channels
Integrated N-channel DMOS transistors
Programmable Average Current with 10-bit resolution
via SPI
–
I
avg
range = 0 to 1000 mA (typical)
Programmable Superimposed Dither
– Programmable Frequency (41 Hz to 1 kHz typ)
– Programmable Amplitude (12.5 to 390 mVpp typ)
– Programmable Hysteresis (40 to 110 mVpp typ)
Interface and Control
– 16-bit SPI (Serial Peripheral Interface) daisy chainable
– A single “Default” pin to disable both channels and reset the programmable
registers of both channels
– 5.0 V and 3.3 V logic compatible I/O
– The contents of all registers can be verified via SPI
– Operation with or without external reference possible
Protection
– Overcurrent
– Overvoltage
– Overtemperature
Diagnostics
– Overcurrent / shorted solenoid
– Overtemperature
– Open load
– Short to GND
Green Product (RoHS compliant)
AEC Qualified
Type
TLE 7241E
Data Sheet
Ordering Code
on request
3
Package
PG-DSO-20-27
Rev. 1.1, 2009-01-19
TLE 7241E
Overview
1.2
•
•
Applications
Variable force solenoids (e.g. automatic transmission solenoids)
Constant current controlled solenoids like
– Idle Speed Control
– Exhaust Gas Recirculation
– Valve control
– Suspension Control
1.3
General Description
The TLE 7241E is a dual channel constant current control solenoid driver with integrated
DMOS power transistors. The average load current can be programmed to a value in the
range of 0 mA to 1000 mA (with a 1
Ω
external sense resistor) with 10 bits of resolution.
Load current is controlled using a hysteretic control scheme with a programmable
hysteresis value. A triangular “dither” waveform can be superimposed on the switching
current waveform in order to improve the transfer function of the solenoid. The amplitude
and frequency of the dither waveform are programmable by the SPI interface. The
device is protected from damage due to overcurrent, overvoltage and overtemperature
conditions, and is able to diagnose and report open loads, shorted loads, and loads
shorted to ground.
Note: An external free-wheeling diode must be provided when using the TLE 7241E in
constant current control mode, otherwise the IC will be damaged.
For best accuracy, an external 2.5 V reference voltage should be supplied at the REF
pin. The TLE 7241E also includes an internal 2.5 V reference voltage, which can be
selected by connecting the REF pin to ground. The reference voltage selection (internal
or external) can be verified via the SPI interface.
Data Sheet
4
Rev. 1.1, 2009-01-19
TLE 7241E
Overview
Application Block Diagram
VBAT
VBAT
VDD
BAT
REF
OUT1
DEFAULT
TEST
Solenoid
VBAT
Logic
Channel 1
NEG1
POS1
VSO
SI
SO
BAT
REF
PGND1
VBAT
SPI
SCK
CSB
OUT2
Channel 2
NEG2
POS2
GND
PGND2
Figure 1
Basic Application Diagram
Data Sheet
5
Rev. 1.1, 2009-01-19
Solenoid
实时操作系统RTOS
