Infineon XDPP1100 Technical Reference Manual page 2

XDPP1100 technical reference manual
Digital power controller
Table of contents
2.4 VS registers ............................................................................................................................................ 28
3 Current sense (IS) .................................................................................................................. 37
3.1 Current sense module configuration .................................................................................................... 38
3.2 Current sense analog to digital converter ............................................................................................ 40
3.2.1 Current sense analog front end ....................................................................................................... 41
3.2.2 Current estimator ............................................................................................................................. 42
3.2.2.1 PWM state .................................................................................................................................... 43
3.2.2.2 Slope estimator ........................................................................................................................... 48
3.2.2.3 Error tracking .............................................................................................................................. 51
3.2.2.4 Trace inductance of the PCB current sensing ............................................................................ 52
3.3 Current sense processor ....................................................................................................................... 52
3.3.1 ADC codes to amps ........................................................................................................................... 53
3.3.2 Peak current limiting........................................................................................................................ 54
3.3.3 Negative current limiting ................................................................................................................. 54
3.3.4 Short-circuit protection ................................................................................................................... 54
3.3.5 Error tracking fault detection .......................................................................................................... 55
3.4 Current sense registers ......................................................................................................................... 56
3.5 Current sense PMBus commands ......................................................................................................... 64
4 Telemetry sense .................................................................................................................... 66
4.1 Telemetry sense ADC ............................................................................................................................. 66
4.2 TS input mux and sequencing .............................................................................................................. 66
4.3 Telemetry sense current DAC ................................................................................................................ 69
4.4 Telemetry sense processor ................................................................................................................... 69
4.4.1 Sequencer ......................................................................................................................................... 70
4.4.2 Gain and offset correction ............................................................................................................... 70
4.4.3 V computation ................................................................................................................................ 71
IN
4.4.4 Internal temperature (ITSEN) computation .................................................................................... 71
4.4.5 X-valent measurement ..................................................................................................................... 72
4.5 Telemetry sense registers ..................................................................................................................... 73
5 Voltage control ..................................................................................................................... 80
5.1 PMBus commands to HW parameters .................................................................................................. 81
5.2 Ramp generator ..................................................................................................................................... 81
5.3 Interrupts ............................................................................................................................................... 83
5.4 Multi-segment droop (load-line)........................................................................................................... 83
5.4.1 Droop voltage computation ............................................................................................................ 84
5.4.2 Droop voltage filtering ..................................................................................................................... 86
5.5 Output summation and clamping ........................................................................................................ 87
5.6 Voltage control registers ....................................................................................................................... 88
5.7 Voltage control PMBus commands....................................................................................................... 95
6 Compensator ........................................................................................................................ 98
6.1 Compensation filter .............................................................................................................................. 98
6.1.1 Pre-filter ............................................................................................................................................ 99
6.1.2 PID term computation ................................................................................................................... 102
6.1.3 Post-filter and summation ............................................................................................................. 110
6.1.4 Input/output clamping of the compensation filter ...................................................................... 111
6.1.5 Output override - forced duty cycle .............................................................................................. 112
6.1.6 Coefficient scaling .......................................................................................................................... 112
6.1.7 Freeze, reset accumulator ............................................................................................................. 112
6.2 Input voltage feed-forward ................................................................................................................. 113
User Manual 2 of 562 V 1.0
2021-08-25