TIOS101 Datasheet, PDF (15/26 Pages) Texas Instruments – Digital Sensor Output Drivers with Integrated Surge Protection

www.ti.com
TIOS101
SLLSEV6 – JULY 2017
8.3.8 Integrated Surge Protection and Transient Waveform Tolerance
The VCC and OUT pins of the device are capable of withstanding up to 1.2 kV of 1.2/50 – 8/20 μs IEC 61000-4-5
surge with a source impedance of 500 Ω. The surge testing should be performed with a minimum 100 nF supply
decoupling capacitor between VCC and GND, and 1 µF between VCC_IN/OUT and GND.
External TVS diodes may be required for higher transient protection levels. The system designer should ensure
that the maximum clamping voltage of the external diodes should be < 65 V at the desired current level. The
device is capable of withstanding up to ±65-V transient pulses < 100 µs.
Combination
R
Wave
Generator
Decoupling
Network
>100nF
EUT
VCC
OUT
GND
1.2/50 - 80/20 µs CWG
R = 500 Ω
Figure 13. Surge Test Setup
8.3.9 Power Up Sequence
VCC_IN and VCC domains can be powered up in any sequence. In the event of VCC is powered and VCC_IN is
not, the OUT pin remains in high impedance.
8.3.10 Undervoltage Lock-Out (UVLO)
The device enters UVLO if the VCC voltage falls below V_(UVLO). (For the device without the integrated LDO, the
device monitors VCC_IN in addition to VCC. UVLO happens if either supply falls below the threshold.)
As soon as the supply falls below V_(UVLO), NFAULT is pulled low, the LDO is turned off and the OUT output is
disabled (Hi-Z). Receiver performance is not specified in this mode.
When the supply rises above V_(UVLO), NFAULT returns to Hi-Z (given no other fault conditions present) and the
LDO will be enabled immediately. The OUT output will be turned on after T_(UVLO) delay.
8.4 Device Functional Modes
These devices can operate in three different modes.
8.4.1 NPN Configuration (N-Switch Mode)
Set IN pin high (or open) and use EN pin as control for realizing the function of an N-switch (low-side
configuration) on OUT.
8.4.2 PNP Configuration (P-Switch Mode)
Set IN pin low and use EN pin as control for realizing the function of a P-switch (high-side configuration) on OUT.
8.4.3 Push-Pull Mode
Set EN pin high and toggle IN as control for realizing the function of a push-pull output on OUT. Table 4, Table 5
and Table 6 summarize the pin configurations to accomplish the functional modes.
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: TIOS101
Submit Documentation Feedback
15