LM3492HC-Q1 Series

Automotive 2-channel individual dimmable LED driver with boost converter and fast current regulator

Catalog

Automotive 2-channel individual dimmable LED driver with boost converter and fast current regulator

Part	Package / Case	Package / Case [custom]	Package / Case	Current - Output / Channel [Max]	Current - Output / Channel [Min]	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Number of Outputs	Mounting Type	Voltage - Supply (Min) [Min]	Grade	Supplier Device Package	Qualification	Applications	Type	Frequency [Max]	Frequency [Min]	Voltage - Supply (Max) [Max]	Utilized IC / Part	Outputs and Type	Outputs and Type	Voltage - Input [Min]	Voltage - Input [Max]	Supplied Contents	Voltage - Output	Current - Output / Channel
Texas Instruments LM3492HCQMH/NOPB	20-PowerTSSOP	4.4 mm	0.173 in	250 mA	50 mA	-40 °C	125 °C	Step-Up (Boost)	2	Surface Mount	4.5 V	Automotive	20-HTSSOP	AEC-Q100	Backlight	DC DC Regulator	1 MHz	200 kHz	65 V
Texas Instruments LM3492MHX/NOPB	20-PowerTSSOP	4.4 mm	0.173 in	250 mA	50 mA	-40 °C	125 °C	Step-Up (Boost)	2	Surface Mount	4.5 V		20-HTSSOP		Backlight	DC DC Regulator	1 MHz	200 kHz	65 V
Texas Instruments LM3492EVAL/NOPB																				LM3492	2	Non-Isolated	9 VDC	16 V	Board(s)	38 V	150 mA
Texas Instruments LM3492QMHX/NOPB	20-PowerTSSOP	4.4 mm	0.173 in	250 mA	50 mA	-40 °C	125 °C	Step-Up (Boost)	2	Surface Mount	4.5 V	Automotive	20-HTSSOP	AEC-Q100	Backlight	DC DC Regulator	1 MHz	200 kHz	65 V
Texas Instruments LM3492AR111DEMO/NOPB
Texas Instruments LM3492HCQMHX/NOPB	20-PowerTSSOP	4.4 mm	0.173 in	250 mA	50 mA	-40 °C	125 °C	Step-Up (Boost)	2	Surface Mount	4.5 V	Automotive	20-HTSSOP	AEC-Q100	Backlight	DC DC Regulator	1 MHz	200 kHz	65 V
Texas Instruments LM3492HCEVM																				LM3492HC		2 Non-Isolated Outputs	9 VDC	16 V	Board(s)	38 V	150 mA
Texas Instruments LM3492HCMH/NOPB	20-PowerTSSOP	4.4 mm	0.173 in	250 mA	50 mA	-40 °C	125 °C	Step-Up (Boost)	2	Surface Mount	4.5 V		20-HTSSOP		Backlight	DC DC Regulator	1 MHz	200 kHz	65 V

Catalog

Automotive 2-channel individual dimmable LED driver with boost converter and fast current regulator

Key Features

• Boost Converter:LM3492-Q1 is an Automotive Grade Product That is AEC Q100 Grade 1 QualifiedVery Wide Input Voltage Ranged From 4.5 V to 65 VProgrammable Soft StartNo Loop Compensation RequiredStable With Ceramic and Other Low ESR Capacitors With No Audible NoiseNearly Constant Switching Frequency Programmable From 200 kHz to 1 MHzCurrent Regulators:Programmable LED Current from 50 mA to 200 mA1000:1 Contrast Ratio at a Dimming Frequency of More Than 3 kHz, Minimum LED Current Pulse Width is 300 nsTwo Individual Dimmable LED Strings up to 65 V, Total 15 W (Typically 28 LEDs at 150 mA)Dynamic Headroom Control Maximizes EfficiencyOver-Power Protection±3% Current AccuracySupervisory Functions:Precision EnableCOMM I/O Pin for Diagnostic and CommandsThermal Shutdown ProtectionThermally Enhanced 20-Pin HTSSOP packageBoost Converter:LM3492-Q1 is an Automotive Grade Product That is AEC Q100 Grade 1 QualifiedVery Wide Input Voltage Ranged From 4.5 V to 65 VProgrammable Soft StartNo Loop Compensation RequiredStable With Ceramic and Other Low ESR Capacitors With No Audible NoiseNearly Constant Switching Frequency Programmable From 200 kHz to 1 MHzCurrent Regulators:Programmable LED Current from 50 mA to 200 mA1000:1 Contrast Ratio at a Dimming Frequency of More Than 3 kHz, Minimum LED Current Pulse Width is 300 nsTwo Individual Dimmable LED Strings up to 65 V, Total 15 W (Typically 28 LEDs at 150 mA)Dynamic Headroom Control Maximizes EfficiencyOver-Power Protection±3% Current AccuracySupervisory Functions:Precision EnableCOMM I/O Pin for Diagnostic and CommandsThermal Shutdown ProtectionThermally Enhanced 20-Pin HTSSOP package

Description

The LM3492HC/-Q1 device integrates a boost converter and a two-channel current regulator to implement a highly efficient and cost effective LED driver. This device drives two individually dimmable LED strings with a maximum power of 15 W and an output voltage of up to 65 V. The boost converter employs a proprietary projected-on-time control method to give a fast transient response with no compensation required. The nearly constant switching frequency can be set to a level from 200 kHz to 1 MHz. Ceramic capacitors stabilize the application circuit and produce no audible noise on dimming. The programmable peak current limit and soft-start features reduce current surges at start-up. An integrated, 190-mΩ, 3.9-A, N-Channel MOSFET switch minimizes the solution size. The fast slew rate current regulator allows high frequency and narrow pulse width dimming signals to achieve a very high contrast ratio of 10000:1. The LED current can be set from 50 mA to 250 mA by a single resistor. All trademarks are the property of their respective owners. To maximize the efficiency, (DHC) automatically adjusts the output voltage to a minimum. The DHC also facilitates a single BOM for different number of LED in a string, which is required for back-light panels of different size, thereby reducing overall development time and cost. The LM3492HC device includes a COMM pin that serves as a bidirectional I/O pin. The versatile COMM pin interface with an external micro-controller unit (MCU) is used for the following functions: power-good, overtemperature, IOUT overvoltage and undervoltage indications, switching frequency tuning, and channel 1 disabling. Other supervisory functions of the device include precise enable, VCC undervoltage lockout, current regulator over-power protection, and thermal shutdown protection. The device is available in the thermally enhanced PWP, 20-pin package. The LM3492HC/-Q1 device integrates a boost converter and a two-channel current regulator to implement a highly efficient and cost effective LED driver. This device drives two individually dimmable LED strings with a maximum power of 15 W and an output voltage of up to 65 V. The boost converter employs a proprietary projected-on-time control method to give a fast transient response with no compensation required. The nearly constant switching frequency can be set to a level from 200 kHz to 1 MHz. Ceramic capacitors stabilize the application circuit and produce no audible noise on dimming. The programmable peak current limit and soft-start features reduce current surges at start-up. An integrated, 190-mΩ, 3.9-A, N-Channel MOSFET switch minimizes the solution size. The fast slew rate current regulator allows high frequency and narrow pulse width dimming signals to achieve a very high contrast ratio of 10000:1. The LED current can be set from 50 mA to 250 mA by a single resistor. All trademarks are the property of their respective owners. To maximize the efficiency, (DHC) automatically adjusts the output voltage to a minimum. The DHC also facilitates a single BOM for different number of LED in a string, which is required for back-light panels of different size, thereby reducing overall development time and cost. The LM3492HC device includes a COMM pin that serves as a bidirectional I/O pin. The versatile COMM pin interface with an external micro-controller unit (MCU) is used for the following functions: power-good, overtemperature, IOUT overvoltage and undervoltage indications, switching frequency tuning, and channel 1 disabling. Other supervisory functions of the device include precise enable, VCC undervoltage lockout, current regulator over-power protection, and thermal shutdown protection. The device is available in the thermally enhanced PWP, 20-pin package.