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TPS272C45C

更新时间： 2024-11-20 02:49:27
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德州仪器 - TI /
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59页 2545K
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TPS272C45 45-mΩ, Dual-Channel Smart High-Side Switch With Diagnostics

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TPS272C45C 数据手册

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TPS272C45  
SLVSF24A – DECEMBER 2020 – REVISED DECEMBER 2021  
TPS272C45 45-mΩ, Dual-Channel Smart High-Side Switch With Diagnostics  
1 Features  
3 Description  
•
Low RON (45-mΩ typical) high-side switch for 24-V  
industrial applications  
Wide DC operating voltage range: 6 V to 36 V  
Low quiescent current (Iq) of 0.5 mA per channel  
(typical) from 24-V supply  
Fixed (5.8 A) and adjustable (0.7 A to 4 A with  
external resistor) current limiting  
Drive inductive, capacitive, and resistive loads  
– Integrated output clamp to support inductive  
load discharge  
– Capacitive load drive minimizing peak inrush  
current through dual threshold current limiting  
Robust output protection  
– Thermal shutdown  
– Protection against short to ground events  
– Configurable fault handling  
TPS272C45 is a dual-channel smart high-side switch  
designed to meet the requirements of industrial  
control systems. The low RDSON (45 mΩ) minimizes  
device power dissipation driving a wide range (100  
mA to 3 A) of output load current. TPS272C45  
provides an additional low voltage supply (3.3 V to  
5 V) input pin to minimize no-load power dissipation.  
The device integrates protection features such as  
thermal shut down, output clamp, and overcurrent  
limit. These features improve system robustness  
during fault events such as short circuit.  
•
•
•
•
TPS272C45 implements an adjustable threshold  
current limiting circuit that improves the reliability  
of the system by reducing inrush current when  
driving large capacitive loads and minimizing overload  
current. The device also implements a configurable  
inrush current time period with a higher level of  
allowed current to drive high inrush current loads like  
lamps or for fast charging of capacitive loads. The  
device also provides an accurate load current sense  
that allows for improved load diagnostics enabling  
better predictive maintenance.  
•
•
Enhanced diagnostic feature  
– Output load current measurement  
– Open load (off-state) detection  
Package: 24-pin QFN (5 mm × 4 mm)  
Functional Safety-Capable  
– Documentation available to aid functional safety  
system design  
•
•
TPS272C45 is available in a small 24-pin, 5 mm ×  
4 mm QFN leadless package with 0.5 mm pin pitch  
minimizing the PCB footprint.  
2 Applications  
•
Industrial PLC systems  
– Digital output modules  
– IO-Link master ports  
Motor drives  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
•
•
TPS272C45  
QFN (24)  
5 mm × 4 mm  
Building automation systems  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
24-V Power Supply  
5-V/3.3-V Power  
VS  
Supply (Optional)  
VS  
TPS272C45  
UV/OV  
Detection  
Internal Power  
Supply  
FET Vds Clamp  
VDD  
GND  
VDD  
GND  
EN1  
EN2  
EN1  
EN2  
VOUT1  
VOUT2  
Gate Driver  
Power FET  
Channel 1/2  
FLT  
OUT1  
MCU  
DIA_EN  
SEL  
LATCH  
ILIM1  
ILIM2  
ILIMD  
Current Limit  
To Inductive,  
SNS  
Thermal  
Shutdown  
Capacitive and  
Resistive Load  
RSNS  
FLT  
DIA_EN  
SEL  
ILIM1  
ILIM2  
ILIMD  
OUT2  
Open-load  
detection  
Fault Indication  
SNS  
RILIM1  
RILIM2  
SNS Mux  
Current Sense  
RILIMD  
GND  
Typical Application Schematic  
Functional Block Diagram  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION  
DATA.  
 
 
 
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