參數(shù)資料
型號(hào): TLE8242-2
廠商: INFINEON TECHNOLOGIES AG
元件分類(lèi): 模擬信號(hào)調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, PQFP64
封裝: GREEN, PLASTIC, LQFP-144
文件頁(yè)數(shù): 26/78頁(yè)
文件大?。?/td> 1589K
代理商: TLE8242-2
TLE8242-2
Functional Description and Electrical Characteristics
Data Sheet
32
Rev. 1.0, 2010-02-09
Figure 17
Current Profile Diagram - Time Out Failure
Figure 18
Current Profile Diagram - Detection Interrupted Failure
The Current Profile Detection feature is active only in Direct PWM mode. The method employed is to look for three
specific "patterns" of the current in 3 zones. This detection method is generally used for on/off valves. The on/off
control of the valve is achieved by selecting the PWM period desired and setting to a 0% or 100% duty cycle via
SPI, however the detection may work within a single PWM on-time with a duty cycle less than 100% if the profile
completes before the gate turns off.
The PWM period (N and M values) are critical as these values set the A/D sample rate used in the current profile
detection. The full 10-bit result of the A/D converter is used for the CPD function. Using a 200 mOhm sense
resistor, this translates into a resolution of 1.56 mA.
Measured Current
(Differential Voltage )
A/D Samples
Zone 1
Timeout for Failure
PASS
Time Out
Detect Interrupt
OUTx Voltage
Zone 2
Time Out Timer
Measured Current
(Differential Voltage )
A/D Samples
Zone 1
Timeout for Failure
PASS
Time Out
Detect Interrupt
OUTx Voltage
Zo
ne
2
Time Out Timer
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