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參數(shù)資料
| 型號： | TLE7242-2G |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封裝： | GREEN, PLASTIC, DSO-28 |
| 文件頁數(shù)： | 49/50頁 |
| 文件大?。?/td> | 1210K |
| 代理商： | TLE7242-2G |
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TLE7242-2G
Overview
Data Sheet
8
Rev. 1.0, 2008-07-09
Figure 5
Transient Mode State Diagram
A typical current waveform during transient mode operation is shown in Figure 6. Starting from a set point I, the
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 Figure 3.
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
Transient Mode Timing Diagram
Steady-
State
Mode
Reset
OUTx = High
OUTx = Low
OUTx = High
LEAVE
HYST MODE
OUTx := LOW
Controller := stop
CALC
DC
OUTx := LOW
Controller := stop
Set Point change > Threshold
New Set Point > Old Set Point
Set point change > Threshold
New Set Point < Old Set Point
Measured Current > New Set Point
Measured Current < New Set Point
Measured Current < New
Set Point
Measured Current > New
Set Point
OUTx = Low
Start of PWM period
next
ADC value
INT
PRELOAD
OUTx := LOW
Controller := stop
PWM
i
L
setpoint
ΙΙ
setpoint
Ι
t
SPI CS_B
setpoint
ΙΙ accepted
Steady State
Mode Begins
Transient Mode
Begins
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