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参数资料
| 型号： | TLE7242-2G |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封装： | GREEN, PLASTIC, DSO-28 |
| 文件页数： | 47/50页 |
| 文件大小： | 1210K |
| 代理商： | TLE7242-2G |
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TLE7242-2G
Overview
Data Sheet
6
Rev. 1.0, 2008-07-09
The 11 bit Current Set Point is programmed via the SPI message #3. The equation for calculating the current
setpoint is:
The Proportional coefficient (KP) and the Integral coefficient (KI) of the control loop are programmed in SPI
message #5. The KP and KI values should be set to values that result in the desired transient response of the
control loop. The duty cycle of the OUTx pin can be calculated from the difference equations:
where error is the difference between the commanded average current and measured average current in units of
Amps.
where k indicates the integral number of PWM periods that have elapsed since current regulation was initiated.
Figure 3
Control Loop - Steady-State Mode
Auto Zero
When a channel is configured for constant current operation and the current set point is 000h for 256 consecutive
PWM periods, an autozero sequence is initiated. The autozero sequence will measure the offset of the current
SENSE
setpoint
R
(11bit)
t
setpoin
mA
Current
320
2
]
[
11
=
()
)
1
(
1
*
28
.
1
)
(
)
(
1
*
28
.
1
+
=
+
=
k
INT
k
error
N
Rsense
KI
k
INT
k
INT
k
error
N
Rsense
KP
k
DutyCycle
A/D
Average
Autozero
Value
“ON”
-
CURRENT SET
POINT
DITHER STEP SIZE
Dither
Generation
+
KP
Σ
KI
PWM
Block
PWM
CLK
+
DITHER STEPS
OUTx
POSx
NEGx
Amp
+
-
Auto Zero
Autozero
Value
“OFF”
DUTY
CYCLE
CURRENT
READ
PRE-
LOAD
Italics = CAN BE MONITORED VIA SPI
Underlined = CAN BE PROGRAMMED VIA SPI
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相关代理商/技术参数 |
参数描述 |
|---|---|
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| TLE7243SLFUMA1 | 制造商:Infineon Technologies AG 功能描述:MC RELAY + LED 制造商:Infineon Technologies AG 功能描述:MC RELAY + LED - Tape and Reel |
| TLE7243SLXUMA2 | 制造商:Infineon Technologies AG 功能描述:Power Switch Lo Side 0.26A 制造商:Infineon Technologies AG 功能描述:Power Switch Lo Side 0.26A 24-Pin SSOP 制造商:Infineon Technologies AG 功能描述:IC DRIVER SPI 8CH LS 24SSOP |
| TLE7244SL | 功能描述:电源开关 IC - 配电 MC RELAY + LED RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
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