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UCD3138RJAT Folha de dados(PDF) 47 Page - Texas Instruments

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Nome de Peças UCD3138RJAT
Descrição Electrónicos  Highly Integrated Digital Controller for Isolated Power
PDF  89 Pages
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

UCD3138RJAT Folha de dados(HTML) 47 Page - Texas Instruments

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EXT CAP
AD02
400
Digital
RSHARE
250
3.3 V
ISHARE
ADC12 and
CMP
ESD
ESD
250
3. 2 k
ESD
AD13
3.3V
SW2
SW1
SW3
3.3 V
ADC12 and
CMP
47
UCD3138
www.ti.com
SLUSAP2G – MARCH 2012 – REVISED SEPTEMBER 2016
Submit Documentation Feedback
Product Folder Links: UCD3138
Detailed Description
Copyright © 2012–2016, Texas Instruments Incorporated
•
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:
Figure 6-16. Simplified Current Sharing Circuitry
CURRENT SHARING MODE
FOR TEST ONLY,
ALWAYS KEEP 00
CS_MODE
EN_SW1
EN_SW2
DPWM
Off or Slave Mode (3-state)
00
00 (default)
0
0
0
PWM Bus
00
01
1
0
ACTIVE
Off or Slave Mode (3-state)
00
10
0
0
0
Analog Bus or Master
00
11
0
1
0
The period and the duty of 8-bit PWM current source and the state of the SW1 and SW2 switches can be
controlled through the current sharing control register (CSCTRL).
6.5.13 Temperature Reference
The temperature reference register (TEMPREF) provides the ADC12 count when ADC12 measures the
internal temperature sensor (channel 14) during the factory trim and calibration.
This information can be used by different periodic temperature compensation routines implemented in the
firmware. But it should not be overwritten by firmware, otherwise this factory written value will be lost.



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