TLE82452-3SA_15 Datasheet, PDF (65/71 Pages) Infineon Technologies AG – 2 Channel High-Side and Low-Side Linear Solenoid Driver IC

TLE82452-3SA
SPI Registers
12.13 FEEDBACK REGISTER
FEEDBACK
Feedback Register
Reset Value: 4x00 0000_H
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R/W 1
0
0
0
not
used
Channel #
CAL MODE - Current Feedback
CFB=0 - Current Feedback
CFB=1 - Max Current
15 14 13 12 11 10
9
CAL MODE - Current Feedback (cont)
CFB=0 Current FB (cont)
CFB=1 - MIN Current
8
7
6
5
4
3
2
1
0
not used
CFB=0 Period Feedback
CFB = 1 - # switching periods in dither cycle
Field
Bits
R/W
31
Channel
25:24
CAL MODE
Current FB
Current FB
23:8
23:12
Period FB 11:0
MAX
Current
23:16
Type
rw
r
r
r
r
r
Description
Read / Write bit
0 = Read
1 = Read (cannot write to this register)
When reading this register, the R/W bit is 0
Channel Number
01 = LOAD1
10 = LOAD2
CAL Mode = 1 Current Feedback
lsb = (1500/65535) mA
CAL Mode = 0 & CFB Mode = 0 Current Feedback
Average Load Current = 1.5 * Current FB / Period FB
Average current measured over the last switching cycle
Field value = 0 if channel is not operating
Value set to 00 after read
CAL Mode = 0 & CFB Mode = 0 Switching Period Feedback
1 lsb = 16 / F_SYS
Period of last switching cycle
Field value = 0 if channel is not operating
CAL Mode = 0 & CFB Mode = 1 MAX Current Feedback
lsb = (1500/127) mA
Maximum current measured over last dither cycle (dither enabled)
Maximum current measured since last read of this register (dither off)
Field value = 0 if channel is not operating
Value set to 00 after read
Data Sheet
-
65
Rev 1.0, 2015-03-27