UCD3138128 datasheet(42/80 Pages) TI

42 / 80 page

ADC 12

Temperature

Calibration

Temperature

Sensor

CH15

UCD3138128, UCD3138A64

SLUSBZ8A – JUNE 2014 – REVISED SEPTEMBER 2014

www.ti.com

9.3.13 Temperature Sensor Control

Temperature sensor control register provides internal temperature sensor enabling and trimming capabilities. The

internal temperature sensor is disabled by default.

Figure 27. Internal Temp Sensor

Temperature sensor is calibrated at room temperature (25 °C) via a calibration register value.

The temperature sensor is measured using ADC12 (via Ch15). The temperature is then calculated using a

mathematical formula involving the calibration register (this effectively adds a delta to the ADC measurement).

The temperature sensor can be enabled or disabled.

9.3.14 I/O Mux Control

I/O Mux Control register may be used in order to choose a single specific functionality that is desired to be

assigned to a physical device pin for your application. See the UCD3138x programmer's manual for details on

the available configurations.

9.3.15 Current Sharing Control

UCD3138x provides three separate modes of current sharing operation.

•

Analog bus current sharing

•

PWM bus current sharing

•

Master/Slave current sharing

•

AD02 has a special ESD protection mechanism that prevents the pin from pulling down the current-share bus

if power is missing from the UCD3138x

The simplified current sharing circuitry is shown in the drawing below. The digital pulse connected to SW3

transforms SW3 into a pulse-width-modulated current source. Details on the frequency and resolution of this

feature are in the digital power fusion peripherals manual.

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UCD3138128 Datasheet(PDF) 42 Page - Texas Instruments