TLE72422GXT Infineon Technologies, TLE72422GXT Datasheet - Page 8

• 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 5
A typical current waveform during transient mode operation is shown in
new set point II is accepted a short time after the rising edge on CS_B. The OUTx pin remains high until the
measured load current has reached the new set point. The OUTx pin is then toggled on and off to maintain the
load current near the new set point until the next PWM period begins. The device will then switch back to steady
state control and the OUTx pin will be controlled by the control loop shown in
During the transition from transient mode operation to steady state operation, the integrator is pre-loaded with a
SPI programmable value. This value should be chosen to give an initial PWM duty cycle approximately equal to
the duty cycle required to regulate the load current at the new set point.
Figure 6
Data Sheet
Reset
Transient Mode State Diagram
Transient Mode Timing Diagram
New Set Point < Old Set Point
New Set Point > Old Set Point
Set Point change > Threshold
Set point change > Threshold
Steady-
Mode
State
PWM
SPI CS_B
i
L
ADC value
next
setpoint ΙΙ
OUTx = High
OUTx = Low
Transient Mode
Controller := stop
OUTx := LOW
Begins
CALC
DC
setpoint Ι
setpoint ΙΙ accepted
Controller := stop
PRELOAD
OUTx := LOW
Measured Current > New Set Point
INT
Measured Current < New Set Point
8
Steady State
Mode Begins
Start of PWM period
HYST MODE
Controller := stop
Start of PWM period
OUTx := LOW
LEAVE
Figure
Figure
Measured Current > New
6. Starting from a set point I, the
OUTx = High
OUTx = Low
Set Point
3.
Measured Current < New
t
Rev. 1.0, 2008-07-09
Set Point
TLE7242-2G
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