TPS92550 Datasheet | Texas Instruments

FEATURES - 2 Integrated all Power ponents Including the Power Inductor - Wide Input Voltage Range : 4.5V- 36V - Constant Switching Frequency at 400k Hz - High Contrast Ratio (Minimum dimming current pulse width < 16µs) - Drives up to 10 LEDs in Series at 36V Input - ±3.6% Typical LED Current Accuracy - LED Current Adjustable from 300m A to 450m A - Up to 96% Efficiency - TPS92550 Modules can be Connected in Parallel for Higher Current Operation - Input Under-Voltage Lock-Out (UVLO) - patible with Ceramic and Low ESR Capacitors - Low Electro Magnetic Interference(EMI) plies with EN55015 Standard (1) - LED Open and Short Circuit Protections - Thermal Shutdown and Ro HS pliant - - 40°C to +125˚C Junction Temperature Range DESCRIPTION The TPS92550 Constant Current Buck LED Driver Micro-Module drives maximum 450m A LED current up to 10 LEDs in a single string (maximum 14W). It integrates all the power ponents including the power inductor. The TPS92550 provides a full turnkey, highly efficient solution for wide range of single string LED lighting applications with up to 96% power efficiency. It accepts an input voltage ranging from 4.5V to 36V and delivers a 350m A LED current as default. The LED current is adjustable from 300m A to 450m A by changing a single external resistor. The module operates at constant switching frequency (400k Hz) with low Electro Magnetic Interference (EMI) plying with EN55015 standard. The module has fast control loop to realize fine LED current pulse yielding 256- step PWM dimming resolution at 240Hz for general lighting. Protection feature include thermal shutdown, input under-voltage lockout, LED opencircuit and short-circuit protections. The TPS92550 Micro-Module is available in 7-pin PFM power package. 7 LED6 IADJ 5 VREF 4 GND 3 DIM 2 LED+ 1 LED+ APPLICATIONS - General Lighting, Desk Lamps - Cabinet Lamps, Decorative Lamps - Street Lamps - Architecture Lighting, Recess Lights - Spot Lights - Underwater Lights PACKAGE HIGHLIGHTS - 7...