Datasheet

Temperature
Sensor
Ch14
ADC 12
Temp Cal
UCD3138
SLUSAP2F –MARCH 2012 –REVISED NOVEMBER 2013 www.ti.com
PIN NUMBER
BIT PIN_NAME
UCD3138-64 PIN UCD3138-40 PIN
11 FAULT[2] 42 25
10 FAULT[1] 36 23
9 FAULT[0] 35, 39 22
8 SYNC 12, 26,37 8, 21
7 DPWM3B 24 18
6 DPWM3A 23 17
5 DPWM2B 22 16
4 DPWM2A 21 15
3 DPWM1B 20 14
2 DPWM1A 19 13
1 DPWM0B 18 12
0 DPWM0A 17 11
4.20 Temperature Sensor Control
Temperature sensor control register provides internal temperature sensor enabling and trimming
capabilities. The internal temperature sensor is disabled as default.
Figure 4-8. 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.
4.21 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.
4.22 Current Sharing Control
UCD3138 provides three separate modes of current sharing operation.
• Analog bus current sharing
• PWM bus current sharing
• Master/Slave current sharing
56 Functional Overview Copyright © 2012–2013, Texas Instruments Incorporated
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