Led Driver IC

Service Details:

Description The FL7733A is a highly−integrated PWM controller  with advanced Primary−Side Regulation (PSR) technique to minimize components in low−to−mid−power LED lighting converters. Using an innovative TRUECURRENT® technology to provide tight tolerance constant−current output, this LED driver enables designs with constant current (CC) tolerance of less than ±1% over the universal line voltage range to meet stringent LED brightness requirements. By minimizing turn−on time fluctuation, high power factor and low THD over the universal line range are obtained in the FL7733A. An integrated high−voltage startup circuit implements fast startup and high system efficiency. During startup, adaptive feedback loop control anticipates the steady−state condition and sets initial feedback condition close to the steady state to ensure no overshoot or undershoot of LED current. The FL7733A also provides powerful protections, such as LED short / open, output diode short, sensing  resistor short / open, and over−temperature for high system reliability. The FL7733A controller is available in an 8−pin Small−Outline Package (SOP). Features Performance • <±3% Total Constant Current Tolerance Over All Conditions <±1% Over Universal Line Voltage Variation <±1% from 50% to 100% Load Voltage Variation <±1% with ±20% Magnetizing Inductance Variation • Primary−Side Regulation (PSR) Control for Cost−Effective Solution without Requiring Input Bulk Capacitor and Secondary Feedback Circuitry • Application Input Voltage Range: 80 VAC − 308 VAC • High PF of >0.9, and Low THD of <10% Over Universal Line Input Range • Fast <200 ms Start−up (at 85 VAC) Using Internal High−Voltage Startup with VDD Regulation • Adaptive Feedback Loop Control for Startup without Overshoot System Protection • LED Short / Open Protection • Output Diode Short Protection • Sensing Resistor Short / Open Protection • VDD Over−Voltage Protection (OVP) • VDD Under−Voltage Lockout (UVLO) SOIC8 CASE 751EB MARKING DIAGRAM ZXYTT 7733A TM 7733A = Device Code Z = Plant Code X= 1 −Digit Year Code Y= 1 −Digit Week Code TT T M = 2−Digit Die Run Code = Package Type (M = SOP) = Manufacture Flow Code PIN CONFIGURATION CS GATE GND VDD 1 2 3 3 4 8 7 3 6 5 Top View HV NC COMI VS ORDERING INFORMATION See detailed ordering and shipping information on page 12 of this data sheet. System Protection (continued) • All Protections are Auto Restart (AR) • Cycle−by−Cycle Current Limit • Over−Temperature Protection (OTP) • All Protections are Auto Restart (AR) • Cycle−by−Cycle Current Limit Applications • Low to Mid Power LED Lighting Systems of 5 W to Greater than 60 W Compatible with Analog Dimming Function Related Product Resources FL7733A Product Folder

Service Details:

The LM3406 family are monolithic switching LM3406HV-Q1 regulators designed to deliver constant currents to Automotive Grade Device high power LEDs. Ideal for automotive, industrial, and AEC-Q100 Grade 1 Qualified general lighting applications, they contain a high-side Operating Ambient Temperature: –40 N-channel MOSFET switch with a current limit of °C to 2.0A (typical) for step-down (Buck) regulators. 125°C Controlled on-time with true average current and an Integrated 2.0A MOSFET external current sense resistor allow the converter VIN Range 6V to 42V (LM3406) output voltage to adjust as needed to deliver a constant current to series and series-parallel VIN Range 6V to 75V (LM3406HV) connected LED arrays of varying number and type. VIN Range 6V to 75V (LM3406HV-Q1) LED dimming via pulse width modulation (PWM) is True Average Output Current Control achieved using a dedicated logic pin or by PWM of 1.7A Minimum Output Current Limit Over the power input voltage. The product feature set is Temperature rounded out with low-power shutdown and thermal shutdown protection.

Service Details:

16 Constant-Current Output Channels The TLC592x is designed for LED displays and LED lighting applications with open-load, shorted-load, and Output Current Adjusted By External Resistor over temperature detection, and constant-current Constant Output Current Range: 5 mA to 120 mA control. The TLC592x contains a 16-bit shift register Constant Output Current Invariant to Load Voltage and data latches, which convert serial input data into Change parallel output format. At the TLC592x output stage, 16 regulated-current ports provide uniform and Open-Load and Shorted-Load Detection constant current for driving LEDs within a wide range 256-Step Programmable Global Current Gain of VF (forward voltage) variations. 

Used in systems:

• Excellent Output Current Accuracy: designed for LED display applications (for example, LED panels)
• TLC592x provides great flexibility and Between Channels: < ±6% (Max), device performance. 
• Users can adjust the output 10 mA to 50 mA current from 5 mA to 120 mA through an external – Between ICs: < ±6% (Max), 10 mA to 50 mA resistor, Rext, which gives flexibility in controlling the 30-MHz Maximum Clock Frequency light intensity of LEDs. 
• The TLC592x is designed for up to 17 V at the output port. The high clock Schmitt-Trigger Input frequency, 30 MHz, also satisfies the system 3.3-V or 5-V Supply Voltage requirements of high-volume data transmission. 

Applications SSOP (24) 8.65 mm × 3.90 mm General LED Lighting Applications TLC5926 SOIC (24) 15.40 mm × 7.50 mm LED Display Systems HTSSOP (24) 7.80 mm × 4.40 mm SSOP (24) 8.65 mm × 3.90 mm LED Signage TLC5927 SOIC (24) 15.40 mm × 7.50 mm.