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TPS92551EVM Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS92551EVM Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 22 page TPS92551, TPS92551EVM www.ti.com SNVS805B – MAY 2012 – REVISED OCTOBER 2012 TPS92551 450mA 23W Constant Current Buck LED Driver Micro-Module Check for Samples: TPS92551, TPS92551EVM 1 FEATURES DESCRIPTION The TPS92551 Constant Current Buck LED Driver 2 • Integrated all power components including the Micro-Module drives maximum 450mA LED current power inductor up to 16 LEDs in a single string (maximum 23W). It • Wide input voltage range : 4.5V - 60V integrates all the power components including the • Constant switching frequency at 800kHz power inductor. The TPS92551 provides a full turn- key, highly efficient solution for wide range of single • High contrast ratio (Minimum dimming current string LED lighting applications with up to 95% power pulse width < 16µs) efficiency. It accepts an input voltage ranging from • Drives up to 16 LEDs in series at 60V input 4.5V to 60V and delivers a 350mA LED current as • ±3.5% typical LED current accuracy default. The LED current is adjustable from 300mA to 450mA by charging a single external resistor. • LED current adjustable from 300mA to 450mA The module operates at constant switching frequency • Up to 95% efficiency (800kHz) with low Electro Magnetic Interference(EMI) • TPS92551 modules can be connected in complying with EN55015 standard. The module has parallel for higher current operation fast control loop to realize fine LED current pulse • Input Under-Voltage Lock-Out (UVLO) yielding 256–step PWM dimming resolution at 240Hz for general lighting. Protection features include • Compatible with ceramic and low ESR thermal shutdown, input under-voltage lockout, LED capacitors open-circuit and short-circuit protections. The • Low Electro Magnetic Interference (EMI) TPS92551 Micro-Module is available in 7-pin PFM complies with EN55015 standard (1) power package. • LED open and short circuit protections • Thermal shutdown and RoHS compliant • -40 ˚C to +125˚C junction temperature range APPLICATIONS • General Lighting, Desk Lamps – Cabinet Lamps (1) θ JA measured on a 1.705” x 3.0” four layer board, with one ounce copper , thirty five – Decorative Lamps 12 mil thermal vias, no air flow, and 1W – Street Lamps power dissipation. • Architecture Lighting, Recess Lights Figure 1. 7-Pin PFM Package – Spot Lights 10.16 x 13.77 x 4.57 mm (0.4 x 0.39 x 0.18 in) θJA = 20°C/W, θJC = 1.9°C/W (1) – Underwater Lights RoHS Compliant PACKAGE HIGHLIGHTS • 7-lead easy-to-use package (Similar to TO-263) • Single exposed die attach pad for enhanced thermal performance • 10.2 x 13.8 x 4.6 mm package (1) EN55015, refer to Figure 35 and Figure 36 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2012, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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