TLE8242-2 Datasheet, PDF (55/78 Pages) Infineon Technologies AG – 8 Channel Fixed Frequency Constant Current Control With Current Profile Detection

TLE8242-2
Functional Description and Electrical Characteristics
Response:
Current and Dither Amplitude Set
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
0
MSG_ID
CHAN
EN 0
Dither Step Size
0
0
1
1 msb
lsb
msb
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Dither Step Size (cont)
Current Setpoint
lsb msb
lsb
Field
MSG_ID
CHAN
EN
Bits
30:27
26:24
23
Dither Step 21:11
Size
Current
10:0
Setpoint
Type
ADDR
ADDR
DATA
DATA
DATA
Description
Message Identifier
0011 =Current and Dither Amplitude set
Channel Number
Operation during ENABLE deactivation
0 = disable (RESET Value)
1 = remain in operation at last setpoint including dither
Dither Step Size (LSb’s value is 2^-2 of the current setpoint LSb)
(RESET Value = 0)
Note: A value of 0 will disable the dither function
Current Set Point
(RESET Value = 0)
Dither
Amplitude
[mA
pp] =
2 ∗ Dither
Stepsize
2¹³
∗ Dither
Steps
∗
320 [mV]
Rsense [Ohm]
Equation: Dither Amplitude Setting
(6)
Average Current
Setting
[mA]
=
Current Setpoint
2¹¹
∗
320[mV]
Rsense[Ohm]
Equation: Average Current Setting
(7)
Data Sheet
55
Rev. 1.0, 2010-02-09