TPS40192

Name: TPS40192
Brand: TI
SKU: TPS40192
Price: 1.019 USD

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4,5-V- bis 18-V-, 20-A-, 600-kHz-Synchron-Abwärtsregler mit Power-Good

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Datenblatt

document-pdfAcrobat TPS4019x 4.5-V to 18-V Input, Voltage-Mode, Synchronous Buck Controller With Power Good datasheet (Rev. H) (Englisch) PDF | HTML

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TPS40192

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Datenblatt

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Produktdetails

Rating

Catalog

Topology

Buck

Iout (max) (A)

20

Vin (max) (V)

18

Vin (min) (V)

4.5

Vout (max) (V)

14.4

Vout (min) (V)

0.591

Control mode

Voltage mode

Features

Enable, Power good, Prebias startup, Synchronous rectification

Duty cycle (max) (%)

85

Iq (typ) (A)

0.0025

Number of phases

1

Operating temperature range (°C)

-40 to 85

Rating

Catalog

Topology

Buck

Iout (max) (A)

20

Vin (max) (V)

18

Vin (min) (V)

4.5

Vout (max) (V)

14.4

Vout (min) (V)

0.591

Control mode

Voltage mode

Features

Enable, Power good, Prebias startup, Synchronous rectification

Duty cycle (max) (%)

85

Iq (typ) (A)

0.0025

Number of phases

1

Operating temperature range (°C)

-40 to 85

VSON (DRC)

10

9 mm² 3 x 3

Input Operating Voltage Range: 4.5 V to 18 V
Up to 20-A Output Currents
Supports Pre-Biased Outputs
0.5%, 591-mV Reference
Switching Frequency
- TPS40192: 600 kHz
- TPS40193: 300 kHz
Three Selectable Thermally Compensated Short-Circuit Protection Levels
Hiccup Restart from Faults
Internal 5-V Regulator
High-Side and Low-Side MOSFET ON-resistance (R_DS(on)) Current Sensing
10-Pin 3 mm × 3 mm SON Package
Internal 4-ms Soft-Start Time
Thermal Shutdown Protection at 145°C

Input Operating Voltage Range: 4.5 V to 18 V
Up to 20-A Output Currents
Supports Pre-Biased Outputs
0.5%, 591-mV Reference
Switching Frequency
- TPS40192: 600 kHz
- TPS40193: 300 kHz
Three Selectable Thermally Compensated Short-Circuit Protection Levels
Hiccup Restart from Faults
Internal 5-V Regulator
High-Side and Low-Side MOSFET ON-resistance (R_DS(on)) Current Sensing
10-Pin 3 mm × 3 mm SON Package
Internal 4-ms Soft-Start Time
Thermal Shutdown Protection at 145°C

TPS40192 and TPS40193 are cost-optimized synchronous buck controllers that operate from 4.5 V to 18 V input. These controllers implement a voltage-mode control architecture with the switching frequency fixed at either 600 kHz (TPS40192) or 300 kHz (TPS40193). The higher switching frequency facilitates the use of smaller inductor and output capacitors, thereby providing a compact power-supply solution. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs.

Short circuit detection is done by sensing the voltage drop across the low-side MOSFET when it is on and comparing it with a user selected threshold of 100 mV, 200 mV or 280 mV. The threshold is set with a single external resistor connected from COMP to GND. This resistor is sensed at startup and the selected threshold is latched. Pulse-by-pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550 mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This behavior provides limited power dissipation in the event of a sustained fault.

TPS40192 and TPS40193 are cost-optimized synchronous buck controllers that operate from 4.5 V to 18 V input. These controllers implement a voltage-mode control architecture with the switching frequency fixed at either 600 kHz (TPS40192) or 300 kHz (TPS40193). The higher switching frequency facilitates the use of smaller inductor and output capacitors, thereby providing a compact power-supply solution. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs.

Short circuit detection is done by sensing the voltage drop across the low-side MOSFET when it is on and comparing it with a user selected threshold of 100 mV, 200 mV or 280 mV. The threshold is set with a single external resistor connected from COMP to GND. This resistor is sensed at startup and the selected threshold is latched. Pulse-by-pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550 mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This behavior provides limited power dissipation in the event of a sustained fault.

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Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Data sheet	TPS4019x 4.5-V to 18-V Input, Voltage-Mode, Synchronous Buck Controller With Power Good datasheet (Rev. H)	PDF \| HTML	23 Mai 2019
	Selection guide	Power Management Guide 2018 (Rev. R)		25 Jun 2018
	Selection guide	DC/DC Buck Controller Solutions Selection Guide		06 Feb 2018
	Application note	Not All Jitter Is Created Equal (Rev. A)		04 Jul 2015
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Design und Entwicklung

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