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UCC28950PWTR Datasheet(PDF) 2 Page - Texas Instruments |
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UCC28950PWTR Datasheet(HTML) 2 Page - Texas Instruments |
2 / 42 page UCC28950 SLUSA16 – MARCH 2010 www.ti.com DESCRIPTION (CONT.) The UCC28950 also offers multiple light-load management features including burst mode and dynamic SR on/off control when transitioning in and out of Discontinuous Current Mode (DCM) operation, ensuring ZVS operation is extended down to much lighter loads. In addition, the UCC28950 includes support for peak current along with voltage mode control, programmable switching frequency up to 1 MHz and a wide set of protection features including cycle-by-cycle current limit, UVLO and thermal shutdown. A 90-degree phase-shifted interleaved synchronized operation can be easily arranged between two converters. The UCC28950 is available in TSSOP-24 package. ORDERING INFORMATION TEMPERATURE RANGE, TA = PACKAGE TAPE AND REEL QTY. PART NUMBER TJ 250 UCC28950PW -40°C to 125°C Plastic 24-pin TSSOP (PW) 2000 UCC28950PWTR ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) (2) PARAMETER VALUE UNIT Input supply voltage range, VDD (3) -0.4 to 20.0 OUTA, OUTB, OUTC, OUTD, OUTE, OUTF -0.4 to VDD + 0.4 Inputs voltages on DELAB, DELCD, DELEF, SS/EN, DCM, TMIN, RT, SYNC, RSUM, EA+, EA-, -0.4 to VREF + COMP, CS, ADEL, ADELEF 0.4 V Output voltage on VREF -0.4 to 5.6 ESD rating, HBM 2 k ESD rating, CDM 500 Continuous total power dissipation See dissipation rating table Operating virtual junction temperature range, TJ -40 to 150 Operating ambient temperature range, TA -40 to 125 °C Storage temperature, Tstg -65 to 150 Lead temperature (soldering, 10 sec.) 300 (1) Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) These devices are sensitive to electrostatic discharge; follow proper device handling procedures. (3) All voltages are with respect to GND unless otherwise noted. Currents are positive into, negative out of the specified terminal. See Packaging Section of the datasheet for thermal limitations and considerations of packages. DISSIPATION RATINGS (1) DERATING POWER RATING FACTOR RqJC RqJA PACKAGE (°C/W) (°C/W) ABOVE TA = TA < 25°C TA = 70°C TA = 85°C 25°C PW 18.5 89.3 11.2 mW/ °C 1.12 W 0.615 W 0.448 W (1) These thermal data are taken at standard JEDEC test conditions and are useful for the thermal performance comparison of different packages. The cooling condition and thermal impedance RqJA of practical design is specific. 2 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): UCC28950 |
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