|Category||Power Management => Lighting Controllers|
|Description||1.2A Dual Flash LED Driver System With I2C Compatible Interface
The LM3554 is a 2 MHz fixed frequency, current mode synchronous boost converter. The device is designed to operate as a dual 600mA (1.2A total) constant current driver for high current white LEDs, or as a regulated 4.5V or 5V voltage source.
The dual high side current sources allow for grounded cathode LED operation. An adaptive regulation method ensures the current source for each LED remains in regulation and maximizes efficiency.
The main features include: an I 2C compatible interface for controlling the LED current or the desired output voltage, a hardware Flash enable input for direct triggering of the Flash pulse, and dual TX inputs which force the Flash pulse into a low current Torch mode allowing for synchronization to RF power amplifier events or other high current conditions. Additionally, an active high hardware enable (HWEN) input provides a hardware shutdown during system software failures.
|Company||National Semiconductor Corporation|
|Datasheet||Download LM3554 datasheet
|Cross ref.||Similar parts: MAX8834, FAN48630BUC315X, FAN48630BUC33X, FAN48630BUC34X, FAN48630UC315X, FAN48630UC33X, FAN48630UC35X, FAN48630UC37AX, FAN48630UC45X, FAN48630UC50X|
LM3554 PRODUCT BRIEF Synchronous Boost Converter with 1.2A Dual High Side LED Drivers and I2C Compatible Interface
The a 2 MHz fixed frequency, current mode synchronous boost converter. The device is designed to operate as a dual 600mA (1.2A total) constant current driver for high current white LEDs, as a regulated or 5V voltage source. The dual high side current sources allow for grounded cathode LED operation. An adaptive regulation method ensures the current source for each LED remains in regulation and maximizes efficiency. The main features include: an I2C compatible interface for controlling the LED current or the desired output voltage, a hardware Flash enable input for direct triggering of the Flash pulse, and dual TX inputs which force the Flash pulse into a low current Torch mode allowing for synchronization to RF power amplifier events or other high current conditions. Additionally, an active high hardware enable (HWEN) input provides a hardware shutdown during system software failures. Five protection features are available within the LM3554 including a software selectable input voltage monitor, an internal comparator, for interfacing with an external temperature sensor, four selectable current limits to ensure the battery current is kept below a predetermined peak level, an overvoltage protection feature to keeps the output voltage below the OVP threshold in case of an open LED, and an output short circuit protection which limits the output current during an output short to GND. Additionally, the device provides various fault indicators including: a thermal fault flag indicating the LED temperature has tripped the thermal threshold, a flag indicating a TX event has occured, a flag indicating the flash timeout counter has expired, a flag indicating the devices die temperature has reached the thermal shutdown threshold, and a flag indicating an open or short LED. Notice: This document is not a full datasheet. For more imformation regarding this product, or to order samples, please contact your National Semiconductor sales office or visit http://www.national.com/support/dir.html.Features
Dual High Side Current Sources Grounded Cathode Allowing for Better Heatsinking and
>90% Efficiency Ultra-Small Solution Size: < 23mm2 Four Operating Modes: Torch, Flash, LED Indicator and
1.2A Programmable or 5.0V Constant Output Voltage Hardware Flash and Torch Enable LED Thermal Sensing and Current Scaleback Software Selectable Input Voltage Monitor Programmable Flash Timeout Dual Synchronization Inputs for RF Power Amplifier Pulse Events Open and Short LED Detection Active High Hardware Enable for Protection Against System Faults 400kHz I2C Compatible Interface × 0.6mm) µSMDApplications
Camera Phone LED Flash Controller Class D Audio Amplifier Power LED Current Source Biasing
Physical Dimensions inches (millimeters) unless otherwise noted
16 Bump µSMD (0.4mm pitch) For Ordering, Refer to Ordering Information Table NS Package Number = 0.6mm(±0.075mm)
|Related products with the same datasheet|
|Some Part number from the same manufacture National Semiconductor Corporation|
|LM3554TME 1.2A Dual Flash LED Driver System With I2C Compatible InterfaceThe LM3554 is a 2 MHz fixed frequency, current mode synchronous boost converter. The device is designed to operate as a dual 600mA (1.2A|
|LP5553 PowerWise AVS Energy Management Unit With SPMIThe LP5553 is a System Power Management Interface (SPMI) compliant Energy Management Unit for reducing power consumption of low power hand held applications|
|LM57 Resistor-Programmable Temperature Switch And Analog Temperature Sensor From The PowerWise® FamilyThe LM57 is a precision, dual-output, temperature switch with integrated analog temperature sensor. The trip|
|LM25011 42V, 2A Constant On-Time Switching Regulator With Adjustable Current LimitThe LM25011 Constant On-time Step-Down Switching Regulator features all the functions needed to implement a low cost, efficient,|
|LMK04031B Precision Clock Conditioners Low-Noise Clock Jitter Cleaner With Cascaded PLLs From The PowerWise® FamilyThe LMK04000 family of precision clock conditioners provides low-noise jitter cleaning, clock|
|LM3000 Dual Synchronous Emulated Current-Mode Controller From The PowerWise® FamilyThe LM3000 is a dual output synchronous buck controller which is designed to convert input voltages ranging from 3.3V to 18.5V|
|LM48311 Ultra-Low EMI, Filterless, 2.6W, Mono, Class D Audio Power Amplifier With E2SThe LM48311 is a single supply, high efficiency, mono, 2.6W, filterless switching audio amplifier. The LM48311 features National’s|
|LMX2541 High Performance Frequency Synthesizer System With Integrated VCO [Preliminary]The LMX2541 is an ultra low noise frequency synthesizer which integrates a high performance delta-sigma fractional N PLL,|
|DP83848K PHYTER Mini LS Industrial Temperature Single Port 10/100 Mb/s Ethernet TransceiverThe DP83848K addresses the quality, reliability and small form factor required for space sensitive applications in embedded|
|DP83849 PHYTER DUAL Industrial Temperature With Flexible Port Switching Dual Port 10/100 Mb/s Ethernet Physical Layer TransceiverThe number of applications requiring Ethernet Connectivity continues to expand.|
|LM3424 Onstant Current N-Channel Controller With Thermal Foldback For Driving LEDs From The PowerWise® FamilyThe LM3424 is a versatile high voltage N-channel MosFET controller for LED drivers . It can be easily|
|LM3530 High Efficiency, Multi Display LED Driver With 128 Exponential Dimming Steps And Integrated OLED Power Supply In A 1.2mm × 1.6mm µSMD Package From The PowerWise® FamilyThe LM3530 current mode boost converter|
|ADC16DV160 Dual Channel, 16-Bit, 160 MSPS Analog-to-Digital Converter With DDR LVDS Outputs [Preliminary] From The PowerWise® FamilyThe ADC16DV160 is a monolithic dual channel high performance CMOS analog-to-digital|
|LM48557 Mono, Bridge-Tied Load, Ceramic Speaker Driver With I2C Volume Control And ResetThe LM48557 is a single supply, mono, ceramic speaker driver with an integrated charge-pump, designed for portable devices,|
|LPV521 Nanopower, 1.8V, RRIO, CMOS Input, Operational Amplifier From The PowerWise® FamilyThe LPV521 is a single nanopower 552 nW amplifier designed for ultra long life battery applications. The operating voltage|
|DS16EV5110A Video Equalizer (3D+C) For DVI, HDMI Source/Repeater/Sink ApplicationsThe DS16EV5110A is a multi-channel equalizer optimized for video cable extension Source/Repeater/Sink Applications. It operates between|
|LM5027 Voltage Mode Active Clamp Controller From The PowerWise® FamilyThe LM5027 pulse-width modulation (PWM) controller contains all of the features necessary to implement power converters utilizing the Active|
|DS90UR905Q 5-65MHz 24-bit Color FPD-Link II Serializer [Preliminary]The DS90UR905Q/906Q chipset translates a parallel RGB Video Interface into a high-speed serialized interface over a single pair. This serial bus scheme|
LM4881M : Headphone Amplifiers LM4881 - Boomer Dual 200 MW Headphone Amplifier With Shutdown Mode, Package: Soic Narrow, Pin Nb=8
LM4891MX : Boomer Audio Power Amplifiers LM4891 - 1 Watt Audio Power Amplifier, Package: Microsmd, Pin Nb=8
LM614BI : LM614 - Quad Operational Amplifier And Adjustable Reference, Package: Soic Wide, Pin Nb=16
LMC6574BI : LMC6572 - Dual Low Voltage (2.7V to 3V) Operational Amplifier, Package: Soic Narrow, Pin Nb=8
NM93C66EM : Electrically Erasable Programmable Memories
LM4838 : Stereo 2W Audio Power Amp with DC Volume and Selective Gain The LM4838 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4 with less than 1.0% THD or 2.2W into 3 with less than 1.0% THD. Boomer® audio int
LM2451 : 220V Monolithic Triple Channel 12 MHz DC Coupled CRT DTV Driver 12 MHz bandwidth at 130VP-P • 100V black level adjustment range using 0V to 5V input • Current output for IK feedback systems • Greater than 130VP-P output swing capability • 0V to 5V input voltage range • Stable with 0 pF-20 pF
COP8TAB5ELQ8 : 8-bit CMOS Flash Microcontroller with 2k Byte or 4k Byte Memory
LP3999ITLX-3.3NOPB : Low Noise 150ma Voltage Regulator for Rf/analog Applications
COP8SGB740L8 : 8-bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and Usart
PAL20P1AJ : Progammable Array Logic Series 24 (PAL Series 24)
PAL18C10A : Progammable Array Logic Series 24 (PAL Series 24)
DS1233A : 3.3V Econoreset, Econoreset. Automatically restarts microprocessor after power failure Monitors pushbutton for external override Internal circuitry debounces pushbutton switch Maintains reset for 350ms after VCC returns to an in-tolerance condition or pushbutton released Accurate or 15% microprocessor 3.3V power supply monitoring Reduces need for discrete components Precision temperature-compensated.
KF12 : Very Low Drop Voltage Regulators With Inhibit. VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT VERY LOW DROPOUT VOLTAGE (0.4V) VERY LOW QUIESCENT CURRENT (TYP. µA IN OFF MODE, IN ON MODE) OUTPUT CURRENT 500 mA LOGIC-CONTROLLED ELECTRONIC SHUTDOWN OUTPUT VOLTAGES OF 12V INTERNAL CURRENT AND THERMAL LIMIT ONLY 2.2µF FOR STABILITY AVAILABLE ± 2% ACCURACY 25 oC SUPPLY VOLTAGE REJECTION: 70 db (TYP.) TEMPERATURE.
LTZ1000 : > 5V. Ultra Precision Reference. 1.2µVP-P Noise 2µV/kHr Long Term Stability Very Low Hysteresis 0.05ppm/°C Drift Temperature Stabilized The LTZ1000 and LTZ1000A are ultra stable temperature controllable references. They are designed to provide 7V outputs with temperature drifts of 0.05ppm/°C, about 1.2µVP-P of noise and long term stability of 2µV/kHr. Included on the chip is a subsurface.
MDC3205 : Relay/solenoid Driver Silicon Monolithic Circuit Block. Optimized to Switch 5 V Relays from 5 V Rail Compatible with "TX'' and "TQ'' Series Telecom Relays Rated 5 V Low Input Drive Current Internal Zener Clamp Routes Induced Current to Ground Rather Than Back to Supply Guaranteed Off State with No Input Connection Supports Large Systems with Minimal OffState Leakage ESD Resistant in Accordance with the 2000.
MM1320 : Microminiature Low-Noise, Low-saturation Three-pin Regulator. This is a microminiature low-noise stabilized power supply device featuring a highly precise output voltage and a small input/output voltage difference of only at an output current of 60mA. The IC delivers output currents up to rated 200mA, and through use of a noise pin output noise is diminished even further. An on/off pin can be used to turn the output.
PCD6-48-1212 : Single, Dual Output DC-DC Converter 1.5w ~ 25w.
PTB48540 : 5 V, 10-W Power-over-ethernet Power Modulethe PTB48540 Series of Power Modules is Specifically Designed to Provide an ISOlated, Low-voltage Power Source to a Remote Powered Device (PD) in Power-over-ethernet (PoE) Applications. These Modules Are Rated 10 W And Incorporate All The Necessary Interface Requirements to Comply With Ieee Std. 802.3af, For Managing.
SP691A : 5V Supervisors. iq = 60µA ;; Vin Min. = 0V ;; Vin Max. = 5.5V ;; Reset Threshold = 4.65V ;; Reset Active = Low/high ;; Reset Acc = N/a ;; Package = 16 Pin Soic 16 Pin Nsoic 16-Pin Dip.
SPX2431 : Vref = 2.5 ;; Vin (MAX) = 20V ;; Operating Current = 1mA-100mA ;; Acc = 0.5%, 1% ;; Temp. (ppm/°C) = 30 ;; Ref = 4µA ;; Package = 3 Pin SOT-23.
TPS60402 : . applications D Inverts Input Supply Voltage to 60-mA Output Current D Only Three Small 1-µF Ceramic Capacitors D Input Voltage Range From V D PowerSave-Mode for Improved Efficiency at Low Output Currents (TPS60400) Device Quiescent Current Typical 100 µA Integrated Active Schottky-Diode for Start-Up Into Load Small 5-Pin SOT23 Package Evaluation Module.
UCC35706 : Voltage Mode PWM Controllers. UCC35705, UCC35706 HIGHSPEED VOLTAGE MODE PULSE WIDTH MODULATOR D Greater Than 4-MHz Operation D Integrated Oscillator / Voltage Feed Forward Compensation >4:1 Input Voltage Range 25-ns Current Limit Delay Programmable Maximum Duty Cycle Clamp Optocoupler Interface 50-µA Start-Up Current 4.2-mA Operating Current @ 1 MHz Smallest Footprint of the 8-pin.
X40239 : Integrated System Management Ictriple Voltage Monitors, Por, 2 Kbit EePROM Memory, And Dual DCP.
NJU7600 : high speed low voltage operation switching regulator control NJU7600 is a high speed low voltage operation switching regulator control IC. It a totem pole driver that can directly drive an external MOS-FET. Internal soft-start function, Dead time control and timer latch function are included, requiring no external components. All parameters can be optimized.
TL2844B : The TL284xB and TL384xB series of control integrated circuits provide the that are necessary to implement off-line or dc-to-dc fixed-frequency current-mode control schemes, with a minimum number of external components. Internally implemented circuits include an undervoltage lockout (UVLO) and a precision reference that is trimmed for accuracy at the error.
ISL6312 : The ISL6312 four-phase PWM control IC provides a precision voltage regulation system for advanced microprocessors. The integration of power MOSFET drivers into the controller IC marks a departure from the separate PWM controller and driver configuration of previous multiphase product families. By reducing the number of external parts, this integration.
LM20125 : 5A, 500kHz PowerWise Synchronous Buck Regulator The LM20125 is a full featured 500 kHz synchronous buck regulator capable of delivering up to 5A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components,.
SG2001/A : The SG2001/A Series Low?power, Low?noise, Low?dropout The SG2001/A series low?power, low?noise, low?dropout, CMOS linear voltage regulators operate from a 2.5V to 5.5V input and deliver up to 150mA. They are the perfect choice for low voltage, low power applications. An ultra low ground current (100?A at 150mA output)makes these part attractive for battery.
FAN4603 : 6MHz, 500mA Synchronous Buck Regulator The FAN4603 is a fully integrated synchronous DC/DC buck converter that provides up to 500mA of output current over an input voltage ranging from 2.3V to 5.5V. It provides a fixed output voltage level ranging from 1.2V to 1.8V. Other voltage options are available on request. The FAN4603 converter is offered as an ultra-miniature.
TPS51123A : Dual-Synchronous, Step-Down Controller With OOA Operation And 100mA LDO The TPS51123A is a cost effective, dual-synchronous buck controller targeted for notebook system power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The TPS51123A supports high-efficiency, fast transient responses and provides a combined.