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HIP6011 Datasheet(PDF) 9 Page - Intersil Corporation |
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HIP6011 Datasheet(HTML) 9 Page - Intersil Corporation |
9 / 9 page 9 Schottky Selection Rectifier D2 conducts when the upper MOSFET Q1 is off. The diode should be a Schottky type for low power losses. The power dissipation in the schottky rectifier is approxi- mated by: In addition to power dissipation, package selection and heat- sink requirements are the main design tradeoffs in choosing the schottky rectifier. Since the three factors are interrelated, the selection process is an iterative procedure. The maxi- mum junction temperature of the rectifier must remain below the manufacturer’s specified value, typically 125oC. By using the package thermal resistance specification and the schot- tky power dissipation equation (shown above), the junction temperature of the rectifier can be estimated. Be sure to use the available airflow and ambient temperature to determine the junction temperature rise. HIP6011 DC-DC Converter Application Circuit The Figure below shows an application circuit of a DC-DC Converter for a microprocessor application. + - FIGURE 10. UPPER GATE DRIVE - DIRECT VCC DRIVE OPTION +12V HIP6011 GND UGATE PHASE BOOT VCC +5V OR LESS NOTE: VG-S ≈ VCC - 5V Q1 D2 PCOND = IO x Vf x (1 - D) Where: D is the duty cycle = VO/VIN, and Vf is the schottky forward voltage drop HIP6011 RT FB COMP SS REF GND MONITOR AND PROTECTION OSC VCC VIN C1-C5 L2 C6-C11 0.1 µF 2x 1 µF 0.1 µF 1 µF 33pF 0.01 µF 15K 1K 3x 680 µF 4x 1000 µF SPARE UGATE OCSET PHASE BOOT SPARE CR1 Q1 3.01K 1000pF C13 R1 R3 R4 C16 C15 R5 C14 C12 C17-C18 C19 R6 C20 4148 U1 RTN 12VCC 12 2 10 9 8 7 4 5 14 3 SPARE CR3 1206 1206 VOUT RTN ENABLE R2 1K COMP TP1 PHASE TP2 6 R7 10K Component Selection Notes: C1-3 - 3 Each 680 µF 25W VDC, Sanyo MV-GX or Equivalent C6-9 - 4 Each 1000 µF 6.3W VDC, Sanyo MV-GX or Equivalent L1 - Core: Micrometals T60-52; Winding: 14Turns of 17AWG CR1 - 1N4148 or Equivalent CR3 - 15A, 35V Schottky, Motorola MBR1535CT or Equivalent Q1 - Intersil MOSFET; RFP25N05 EN VSEN 1 OVP 13 Q2 2N6394 R8 10K R7 1K R8 1K + - + - HIP6011 |
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Similar Description - HIP6011 |
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