Texas Instruments UCD3138 Technical Reference Manual page 31

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Module
CPCC, DTC, GLBEN, Light load,
Loop Mux
PCM
Analog Comp, Digital Comp, IDE,
Fault Mux
Fault Det
Dead-times, Sample trigger,
DPWM Frequency and Phase Setting, Mode
Switching, Blanking
PID Compensation, Coefficients,
Filter (CLA) Clamps, Non Linear control, Filter
Preset
EADC, AFE, RAMP, SAR, Reference
Front End
DAC, DAC-Dither, PCM
UART
ADC12 (GP ADC) Dual Sample and Hold, Averaging
GLBIO(Global IO), IOMUX, Current
Miscellaneous Analog Sharing, temperature sensor,
PKG_ID (Package identification)
GIO FAULT pin, EXT interrupt
PMBus/ I2C
SPI
Low res. PWM, Watchdog, capture,
Timers
compare
Central Interrupt
CIM
Module
ARM Core
ROM bootloader
Flash Interlock key, PFLASH,
Flash
DFLASH
MMC
(Memory Controller)
DEC
(Address Manager)
Software reset, Exception status,
SYS
Clock Control (M_DIV_RATIO), DEV
(System Module)
(device identification)
The simplest configuration of the Digital Power Peripherals highlighting the key blocks involved in loop
control is shown below:
EAP
Error ADC
EAN (Front End)
The Error ADC (in the Front End) accepts a differential voltage signal as an input. It measures the
difference between this input and a digitally controlled reference voltage and generates a digital error
output. It passes this digital error information to the Filter. The Error ADC (or EADC) is a specialized high
speed, high resolution ADC with a small dynamic range, optimized for power supply error measurement.
The Filter takes the error signal and passes it through a PID based digital filter which compensates for the
characteristics of the external loop. This filter can be dynamically reprogrammed for changing power load
source, and circuit characteristics. It also offers non-linear response capability for better handling of
transients.
SNIU028A – February 2016 – Revised April 2016
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A Guide to Other Documentation for all Members of UCD3138 Family of Products
Programmer's
Function\Manual
Filter
Figure 1-1.
Copyright © 2016, Texas Instruments Incorporated
UCD3138064
Programmer's
Manual
Manual
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Digital
PWM
UCD3138A64/
UCD3138A
UCD3138128
Programmer's
Programmer's
Manual
Manual
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DPWMA
DPWMB
Introduction
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