LM3421-Q1

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Hoja de datos

document-pdfAcrobat LM342x-Q1 N -Channel Controllers for Constant-Current LED Drivers datasheet (Inglés) PDF | HTML

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LM3421-Q1

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Detalles del producto

Number of channels

1

Topology

Boost Controller, Buck-Boost Controller, SEPIC Controller

Rating

Automotive

Operating temperature range (°C)

-40 to 150

Vin (min) (V)

4.5

Vin (max) (V)

75

Vout (min) (V)

3

Vout (max) (V)

72

Iout (max) (A)

5

Iq (typ) (mA)

2

Switching frequency (max) (kHz)

2000

Features

Adjustable Switch Frequency, Enable/Shutdown, Thermal shutdown

Number of channels

1

Topology

Boost Controller, Buck-Boost Controller, SEPIC Controller

Rating

Automotive

Operating temperature range (°C)

-40 to 150

Vin (min) (V)

4.5

Vin (max) (V)

75

Vout (min) (V)

3

Vout (max) (V)

72

Iout (max) (A)

5

Iq (typ) (mA)

2

Switching frequency (max) (kHz)

2000

Features

Adjustable Switch Frequency, Enable/Shutdown, Thermal shutdown

HTSSOP (PWP)

16

32 mm² (5 mm × 6.4 mm)

AEC Qualified for Automotive Applications
- Device Temperature Grade 1: −40°C ≤ T_A ≤ 125°C (LM3421-Q1 and LM3423-Q1)
- Device Temperature Grade 0: −40°C ≤ T_A ≤ 150°C (LM3421-Q0 and LM3423-Q0)
V_IN Range From 4.5 V to 75 V
High-Side Adjustable Current Sense
2-Ω, 1-A Peak MOSFET Gate Driver
Input Undervoltage and Output Overvoltage Protection
PWM and Analog Dimming
Cycle-by-Cycle Current Limit
Programmable Switching Frequency
Zero Current Shutdown and Thermal Shutdown
LED Output Status Flag (LM3423-Q1 and LM3423-Q0 Only)
Fault Status Flag and Timer(LM3423-Q1 and LM3423-Q0 Only)

AEC Qualified for Automotive Applications
- Device Temperature Grade 1: −40°C ≤ T_A ≤ 125°C (LM3421-Q1 and LM3423-Q1)
- Device Temperature Grade 0: −40°C ≤ T_A ≤ 150°C (LM3421-Q0 and LM3423-Q0)
V_IN Range From 4.5 V to 75 V
High-Side Adjustable Current Sense
2-Ω, 1-A Peak MOSFET Gate Driver
Input Undervoltage and Output Overvoltage Protection
PWM and Analog Dimming
Cycle-by-Cycle Current Limit
Programmable Switching Frequency
Zero Current Shutdown and Thermal Shutdown
LED Output Status Flag (LM3423-Q1 and LM3423-Q0 Only)
Fault Status Flag and Timer(LM3423-Q1 and LM3423-Q0 Only)

The LM3421-Q1 and LM3423-Q1 family of devices are versatile high voltage N-channel MOSFET controllers for LED drivers. They can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75 V, makes the these controllers ideal for illuminating LEDs in a large family of applications.

Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3421-Q1 and LM3423-Q1 devices use predictive off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.

The LM3421-Q1 and LM3423-Q1 devices include a high-voltage start-up regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions.

The LM3421-Q1 and LM3423-Q1 family of devices are versatile high voltage N-channel MOSFET controllers for LED drivers. They can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75 V, makes the these controllers ideal for illuminating LEDs in a large family of applications.

Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3421-Q1 and LM3423-Q1 devices use predictive off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.

The LM3421-Q1 and LM3423-Q1 devices include a high-voltage start-up regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions.

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Documentación técnica

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Documentación principal	Tipo	Título	Opciones de formato	Fecha
*	Hoja de datos	LM342x-Q1 N -Channel Controllers for Constant-Current LED Drivers datasheet	PDF \| HTML	30/07/2019
	Informe	LED Drivers for Automotive Exterior Applications (Rev. B)		27/03/2018
	Nota sobre la aplicación	AN-1656 Design Challenges of Switching LED Drivers (Rev. A)		3/05/2013
	Nota sobre la aplicación	AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A)		23/04/2013

Diseño y desarrollo

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