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TPS23785BPWPR Datasheet(PDF) 2 Page - Texas Instruments |
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TPS23785BPWPR Datasheet(HTML) 2 Page - Texas Instruments |
2 / 47 page TPS23785B SLUSB90A – DECEMBER 2012 – REVISED DECEMBER 2012 www.ti.com DESCRIPTION (CONT.) The DC-to-DC controller features two complementary gate drivers with programmable dead time. This simplifies design for highly-efficient flyback topologies utilizing secondary synchronous rectification. The second gate driver may be disabled if desired for single MOSFET topologies. The controller also features internal softstart, bootstrap startup source, current-mode compensation, and a 78% maximum duty cycle. A programmable and synchronizable oscillator allows design optimization for efficiency and eases use of the controller to upgrade existing power supply designs. Accurate programmable blanking, with a default period, simplifies the usual current-sense filter design trade-offs. This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PRODUCT INFORMATION (1) POE UVLO CONVERTER UVLO DUTY CYCLE ON / HYST. ON / HYST. PACKAGE MARKING (V) (V) TPS23785BPWP 0–78% 35 / 4.5 15 / 6.5 TSSOP-24 PowerPAD™ TPS23785B (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or consult your TI salesperson. ABSOLUTE MAXIMUM RATINGS (1) (2) Voltage with respect to VSS unless otherwise noted. Over recommended operating junction temperature range. VALUE UNIT ARTN(2), COM(2), DEN, RTN(3), VDD, VDD1 –0.3 to 100 CLS(4) -0.3 to 6.5 [APD, BLNK(4), CTL, DT(4), FRS(4), VB (4)] to [ARTN, –0.3 to 6.5 COM] Input voltage range [P1, P2(4)] to [ARTN,COM] –0.3 to 6.5 V CS to [ARTN,COM] –0.3 to VB [ARTN, COM] to RTN –2 to 2 T2P(4), VC to [ARTN, COM] –0.3 to 19 Voltage range GATE(4), GAT2(4) to [ARTN, COM] –0.3 to VC+0.3 RTN Internally limited Sinking current T2P 20 mA Sourcing current VB Internally limited Average Sourcing or GATE, GAT2 25 mARMS sinking current Human body model (HBM) 2 kV ESD rating Charged device model (CDM) 500 V Machine model (MM) 50 ESD – system level (contact/air) at RJ-45(5) 8 / 15 kV Operating junction temperature range, TJ –40 to Internally limited °C (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) ARTN and COM tied to RTN. (3) IRTN = 0 for VRTN > 80V. (4) Do not apply voltage to these pins (5) ESD per EN61000-4-2. A power supply containing the TPS23785B was subjected to the highest test levels in the standard. 2 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated |
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