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TPS92551EVM Fiches technique(PDF) 5 Page - Texas Instruments |
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TPS92551EVM Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 26 page TPS92551, TPS92551EVM www.ti.com SNVS805C – MAY 2012 – REVISED MAY 2013 ELECTRICAL CHARACTERISTICS Limits in standard type are for TJ = 25°C unless otherwise stated; limits in boldface type apply over the operating junction temperature range TJ of -40°C to 125°C. Minimum and maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN =48 V, ILED = 350mA. VIN is the voltage applied across LED+ and GND. IIN is the input current flowing into the LED+ node. ILED is a LED current flowing into the LED- pin. VLED is the voltage applied across LED+ and LED-. VDIM is the voltage applied across the DIM pin to ground. Resistor RIADJ connect from IADJ pin to ground. Resistor RVREF connect from VREF pin to ground. Symbol Parameter Conditions Min (1) Typ (2) Max (1) Units SYSTEM PARAMETERS IIN Input Current VLED = 0V, 4.5V ≤ VIN ≤ 60V, VDIM = 0V 2.1 2.65 3.0 mA ILED LED Current VLED = 24V , RIADJ = 0Ω, RVREF = open, TJ = 25°C 340 350 364 mA VLED = 24V, RIADJ = 0Ω, RVREF = open, TJ = 25°C to 125°C 337 350 364 VLED = 24V, RIADJ = 0Ω , RVREF = open, 337 350 371 TJ = -40°C to 125°C ILED–60V LED Current VIN = 60V, VLED = 36V, RIADJ = 0Ω RVREF = open, 342 350 367 mA at VIN = 60V TJ = 25°C VIN = 60V, VLED = 36V, RIADJ = 0Ω, RVREF = open, 338 350 367 TJ = 25°C to 125°C VIN = 60V, VLED = 36V, RIADJ = 0Ω, RVREF = open, 338 350 374 TJ = -40°C to 125°C ILED-ADJ1 Adjusted LED Current VLED = 24V, RIADJ = 0Ω, RVREF = 10.5kΩ, TJ = 25°C 442 450 471 mA VLED = 24V, RIADJ = 0Ω, RVREF = 10.5kΩ, 437 450 471 TJ = 25°C to 125°C VLED = 24V, RIADJ = 0Ω, RVREF = 10.5kΩ, 437 450 483 TJ = -40°C to 125°C ILED-ADJ2 Adjusted LED Current VLED = 24V, RIADJ = 500Ω, RVREF = open, TJ = 25°C 288 300 309 mA VLED = 24V, RIADJ = 500Ω, RVREF = open, 282 300 309 TJ = 25°C to 125°C VLED = 24V, RIADJ = 500Ω, RVREF = open, 282 300 316 TJ = -40°C to 125°C ILED-SHORT LED Short Circuit VLED = 0V, VIN = 60V, DIM = open 800 920 1020 mA Current at VIN = 60V ILED-LEAK “LED-” pin leakage VLED = 0V, VIN = operating max, DIM = 0V 1.2 µA current fSW Switching Frequency VLED = 24V, RIADJ = 0Ω, RVREF = open 720 800 920 kHz VDIM DIM Pin Threshold VDIM Increasing 1.0 1.3 V VDIM-HYS DIM Pin Hysteresis 0.25 V THERMAL CHARACTERISTICS Thermal Shutdown TJ Rising 170 °C TSD Temperature Thermal Shutdown TJ Rising 10 °C TSD-HYS Temp. Hysteresis Junction to Ambient(3) 4 Layer JEDEC Printed Circuit Board, 100 vias, No air flow 19.3 °C/W θJA 2 Layer JEDEC PCB, No air flow 21.5 θJC Junction to Case No air flow 1.9 °C/W (1) Min and Max limits are 100% production tested at an ambient temperature (TA) of 25°C. Limits over the operating temperature range are specified through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL). (2) Typical numbers are at 25°C and represent the most likely parametric norm. (3) θ JA measured on a 1.705” x 3.0” four layer board, with one ounce copper , thirty five 12 mil thermal vias, no air flow, and 1W power dissipation. Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: TPS92551 TPS92551EVM |
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