TLE8242-2 Datasheet, PDF (51/78 Pages) Infineon Technologies AG – 8 Channel Fixed Frequency Constant Current Control With Current Profile Detection

TLE8242-2
5.9.2.9
Functional Description and Electrical Characteristics
SPI Message #8 - Main Period Set
Sent Values:
Main Period Set
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R/W
MSG_ID
CHAN
unused
SAM
0
0
0
1 msb
lsb
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Divider M
msb lsb msb
Field
Bits
R/W
31
MSG_ID
CHAN
SAM
30:27
26:24
16
Divider M 15:14
Divider N 13:0
Type
ADDR
ADDR
DATA
DATA
DATA
Divider N
lsb
Description
Read / Write Bit
0 = Read
1 = Write
Message Identifier
0001 = Main Period Set
Channel Number
Sample Summation Method
0 = Use all values of samples (RESET Value)
1 = throw out first ADC samples after an OUTx pin transition and
use previous sample twice in the average calculation
Divider M (Number of A/D samples per PWM period)
00 = 32 (RESET Value)
01 = 64
10 = 128
11 = 512 (Direct PWM) = 128 (Current Control)
Divider N (Number of main CLK periods between A/D samples)
(RESET Value = 271_H or 625_D)
T_PWM = N*M*T_CLK & T_ADC = N*T_CLK
Data Sheet
51
Rev. 1.0, 2010-02-09