UCD3138 datasheet(47/99 Pages) TI2

47 / 99 page

BIT

PIN_NAME

PIN NUMBER

UCD3138-64

UCD3138-40 PIN

DPWM2A

DPWM1B

DPWM1A

DPWM0B

DPWM0A

9.5.10 Temperature Sensor Control

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

The internal temperature sensor is disabled as default.

Temperature

Sensor

Ch14

ADC 12

Temp Cal

Figure 9-15. 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 Ch14). 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.

9.5.11 I/O Mux Control

In different packages of UCD3138 several I/O functions are multiplexed and routed toward a single physical

pin. 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.

9.5.12 Current Sharing Control

UCD3138 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 UCD3138

The simplified current sharing circuitry is shown in the drawing below:

www.ti.com

UCD3138

SLUSAP2J – MARCH 2012 – REVISED NOVEMBER 2021

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