TLE72422GXT Infineon Technologies, TLE72422GXT Datasheet - Page 5

• Manufacturer Part Number: TLE72422GXT
• Manufacturer: Infineon Technologies

Specifications of TLE72422GXT

• Operating Temperature (max): 150C
• Operating Temperature (min): -40C
• Pin Count: 28
• Mounting: Surface Mount
• Screening Level: Automotive
• Lead Free Status / Rohs Status: Compliant

Figure 1
1.3.2
During constant current operation, the POSx and NEGx pins must be connected to the circuit in the configuration
shown in
Note: An external recirculation diode is required in this configuration otherwise the IC may be damaged.
Figure 2
The constant current control circuit can operate in two modes; steady state mode and transient mode.
Steady-State Mode
During steady-state operation, the PWM control signal driven at the OUTx pin is controlled by the control loop
shown in
divider, N, can be set to any value between 79 and 2
Data Sheet
Figure
Figure
External Circuit Diagram for On/Off Mode Operation
Constant Current Mode Operation
External Circuit Diagram for Constant Current Mode Operation
3. The PWM Frequency is programmed via the SPI message # 1. In this message the main period
2.
NEGx
POSx
OUTx
R
G
R
Q
SENSE
DRV
POSx
NEGx
OUTx
C
ESD
R
V
V
G
BAT
BAT
F
D
Solenoid
PWM
RECIRC
14
R
Q
SENSE
NEGx
DRV
POSx
OUTx
=
-1. The equation for calculating the PWM frequency is:
5
32
F
C
CLK
*
ESD
R
G
N
Solenoid
Q
DRV
C
ESD
V
BAT
Solenoid
Rev. 1.0, 2008-07-09
TLE7242-2G
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