LM25115

ACTIVO

Controlador reductor síncrono/postregulador del lado secundario de 42 V

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Hoja de datos

document-pdfAcrobat LM25115 Secondary Side Post Regulator Controller datasheet (Rev. A) (Inglés)

LM25115

ACTIVO

Hoja de datos

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Detalles del producto

Rating

Catalog

Topology

Buck Controller

Vin (max) (V)

42

Vin (min) (V)

4.5

Vout (max) (V)

13.5

Vout (min) (V)

0.75

Control mode

Voltage mode, current mode

Features

Frequency synchronization

Duty cycle (max) (%)

85

Number of phases

1

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Topology

Buck Controller

Vin (max) (V)

42

Vin (min) (V)

4.5

Vout (max) (V)

13.5

Vout (min) (V)

0.75

Control mode

Voltage mode, current mode

Features

Frequency synchronization

Duty cycle (max) (%)

85

Number of phases

1

Operating temperature range (°C)

-40 to 125

WSON (NHQ)

16

25 mm² (5 mm × 5 mm)

TSSOP (PW)

16

32 mm² (5 mm × 6.4 mm)

Self-synchronization to Main Channel Output
Free-run Mode for Buck Regulation of DC Input
Leading Edge Pulse Width Modulation
Voltage-mode Control with Current Injection and Input Line Feed-forward
Operates from AC or DC Input up to 42V
Wide 4.5V to 30V Bias Supply Range
Wide 0.75V to 13.5V Output Range.
Top and Bottom Gate Drivers Sink 2.5A Peak
Adaptive Gate Driver Dead-time Control
Wide Bandwidth Error Amplifier (4MHz)
Programmable Soft-start
Thermal Shutdown Protection
TSSOP-16 or Thermally Enhanced WSON-16 Packages

All trademarks are the property of their respective owners.

Self-synchronization to Main Channel Output
Free-run Mode for Buck Regulation of DC Input
Leading Edge Pulse Width Modulation
Voltage-mode Control with Current Injection and Input Line Feed-forward
Operates from AC or DC Input up to 42V
Wide 4.5V to 30V Bias Supply Range
Wide 0.75V to 13.5V Output Range.
Top and Bottom Gate Drivers Sink 2.5A Peak
Adaptive Gate Driver Dead-time Control
Wide Bandwidth Error Amplifier (4MHz)
Programmable Soft-start
Thermal Shutdown Protection
TSSOP-16 or Thermally Enhanced WSON-16 Packages

All trademarks are the property of their respective owners.

The LM25115 controller contains all of the features necessary to implement multiple output power converters utilizing the Secondary Side Post Regulation (SSPR) technique. The SSPR technique develops a highly efficient and well regulated auxiliary output from the secondary side switching waveform of an isolated power converter. Regulation of the auxiliary output voltage is achieved by leading edge pulse width modulation (PWM) of the main channel duty cycle. Leading edge modulation is compatible with either current mode or voltage mode control of the main output. The LM25115 drives external high side and low side NMOS power switches configured as a synchronous buck regulator. A current sense amplifier provides overload protection and operates over a wide common mode input range. Additional features include a low dropout (LDO) bias regulator, error amplifier, precision reference, adaptive dead time control of the gate signals and thermal shutdown.

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Documentación técnica

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Documentación principal	Tipo	Título	Fecha
*	Hoja de datos	LM25115 Secondary Side Post Regulator Controller datasheet (Rev. A)	1/04/2013
	Informe	Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A)	10/04/2019
	Guía de selección	Power Management Guide 2018 (Rev. R)	25/06/2018
	Analog Design Journal	Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics	21/07/2016
	Nota sobre la aplicación	Minimizing FET Losses For a High Input Rail Buck Converter (Rev. A)	23/04/2013

Diseño y desarrollo

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