TPS929160-Q1
ZHCSNG0 – APRIL 2023
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7.2 Functional Block Diagram
TPS929160-Q1
VBAT
REF
SUPPLY
OUTXn
Bias
VLDO
16-Ch Output
ERR
Error Feedback
TX
RX
Diagnostics
ADC
FlexWire
Interface
Digital Core
FS0
FS1
Fail-safe
Interface
EEPROM
ADDR2
ADDR1
GND
Device Address
ADDR0
Fail-Safe Statemachine
Main analog blocks
Main digital blocks
Input and output interface
7.3 Feature Description
7.3.1 Device Bias and Power
7.3.1.1 Power Bias (VBAT)
The TPS929160-Q1 is AEC-Q100 qualified for automotive applications. The bias voltage input to the device
through VBAT pin can be low to 4.5 V and up to 40 V for automotive battery directly powered systems. All the
internal analog and digital circuits except for the current output channels are powered by VBAT.
7.3.1.2 Enable and Shutdown (EN)
The TPS929160-Q1 device has an enable input. When EN is low, the device is in sleep mode with ultra low
quiescent current I(SD). This low current helps to save system-level current consumption in applications where
battery voltage directly connects to the device without high-side switches.
When the EN voltage rises above VIL(EN) and V(VBAT) is above V(POR_rising), the TPS929160-Q1 immediately
starts up the internal voltage regulator to provide a stable VLDO, 5V bias to internal analog and digital circuit.
When the EN voltage falls below VIL(EN) and V(VBAT) is above V(POR_rising), the TPS929160-Q1 shuts down all
current output immediately.
7.3.1.3 5-V Low-Drop-Out Linear Regulator (VLDO)
The TPS929160-Q1 has an integrated low-drop-out linear regulator to provide power supply to external CAN
transceivers, such as TCAN1042-Q1. The internal LDO powered by input voltage V(VBAT) provides a stable 5-V
output with up to 80-mA constant current capability. TI recommends a ceramic capacitor from 1 µF to 10 µF
on the VLDO pin. The LDO has an internal current limit I(LDO_LIMIT) for protection and soft start. The capacitor
charging time must be considered to total start-up time period, because the device is held in POR state if the
capacitor voltage is not charged to above UVLO threshold.
Copyright © 2023 Texas Instruments Incorporated
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Product Folder Links: TPS929160-Q1
English Data Sheet: SLVSG60
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