LM3423-Q1 Series

Automotive N-channel constant current LED controller with series DIM FET driver and fault flag

Catalog

Automotive N-channel constant current LED controller with series DIM FET driver and fault flag

Part	Current - Output / Channel	Utilized IC / Part	Supplied Contents	Voltage - Input [Min]	Voltage - Input [Max]	Outputs and Type	Current - Output / Channel [custom]	Features	Voltage - Output	Outputs and Type	Voltage - Supply (Max) [Max]	Qualification	Number of Outputs	Package / Case	Package / Case [custom]	Package / Case	Frequency	Supplier Device Package	Topology	Dimming	Mounting Type	Type	Grade	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply (Min) [Min]
Texas Instruments LM3423BBLSCSEV/NOPB	700 mA	LM3423	Board(s)	10 V	70 V	1 Non-Isolated Output
Texas Instruments LM3423MHBKBSTEV/NOPB		LM3423	Board(s)	4.5 V	35 V	Non-Isolated	1 A	Dimmable	35 V	1
Texas Instruments LM3423Q0MH/NOPB											75 V	AEC-Q100	1	20-PowerTSSOP	4.4 mm	0.173 in	2 MHz	20-HTSSOP	SEPIC Step-Down (Buck) Step-Up (Boost)	Analog PWM	Surface Mount	DC DC Controller	Automotive	150 °C	-40 °C	4.5 V
Texas Instruments LM3423Q0MHX/NOPB											75 V	AEC-Q100	1	20-PowerTSSOP	4.4 mm	0.173 in	2 MHz	20-HTSSOP	SEPIC Step-Down (Buck) Step-Up (Boost)	Analog PWM	Surface Mount	DC DC Controller	Automotive	150 °C	-40 °C	4.5 V
Texas Instruments LM3423MHBSTEVAL/NOPB		LM3423	Board(s)	4.5 V	35 V	Non-Isolated	1 A	Dimmable	35 V	1
Texas Instruments LM3423Q1MHX/NOPB											75 V	AEC-Q100	1	20-PowerTSSOP	4.4 mm	0.173 in	2 MHz	20-HTSSOP	SEPIC Step-Down (Buck) Step-Up (Boost)	Analog PWM	Surface Mount	DC DC Controller	Automotive	125 ¯C	-40 °C	4.5 V
Texas Instruments LM3423MHX/NOPB											75 V		1	20-PowerTSSOP	4.4 mm	0.173 in	2 MHz	20-HTSSOP	SEPIC Step-Down (Buck) Step-Up (Boost)	Analog PWM	Surface Mount	DC DC Controller		125 ¯C	-40 °C	4.5 V

Catalog

Automotive N-channel constant current LED controller with series DIM FET driver and fault flag

Key Features

• AEC Qualified for Automotive ApplicationsDevice Temperature Grade 1: −40°C ≤ TA≤ 125°C (LM3421-Q1 and LM3423-Q1)Device Temperature Grade 0: −40°C ≤ TA≤ 150°C (LM3421-Q0 and LM3423-Q0)VINRange From 4.5 V to 75 VHigh-Side Adjustable Current Sense2-Ω, 1-A Peak MOSFET Gate DriverInput Undervoltage and Output Overvoltage ProtectionPWM and Analog DimmingCycle-by-Cycle Current LimitProgrammable Switching FrequencyZero Current Shutdown and Thermal ShutdownLED Output Status Flag (LM3423-Q1 and LM3423-Q0 Only)Fault Status Flag and Timer(LM3423-Q1 and LM3423-Q0 Only)AEC Qualified for Automotive ApplicationsDevice Temperature Grade 1: −40°C ≤ TA≤ 125°C (LM3421-Q1 and LM3423-Q1)Device Temperature Grade 0: −40°C ≤ TA≤ 150°C (LM3421-Q0 and LM3423-Q0)VINRange From 4.5 V to 75 VHigh-Side Adjustable Current Sense2-Ω, 1-A Peak MOSFET Gate DriverInput Undervoltage and Output Overvoltage ProtectionPWM and Analog DimmingCycle-by-Cycle Current LimitProgrammable Switching FrequencyZero Current Shutdown and Thermal ShutdownLED Output Status Flag (LM3423-Q1 and LM3423-Q0 Only)Fault Status Flag and Timer(LM3423-Q1 and LM3423-Q0 Only)

Description

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.