HIP6304 Intersil Corporation, HIP6304 Datasheet
HIP6304
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HIP6304 Summary of contents
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... TM Data Sheet Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller The HIP6304 multi-phase PWM control IC together with its companion gate drivers, the HIP6601, HIP6602 or HIP6603 and Intersil MOSFETs provides a precision voltage regulation system for advanced microprocessors. Multiphase power conversion is a marked departure from earlier single phase converter confi ...
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... Block Diagram VSEN X 0.9 X1.15 EN COMP VID0 VID1 VID2 VID3 FB Simplified Power System Diagram VSEN PWM 1 HIP6304 PWM 2 VID 2 HIP6304 V PGOOD CC POWER-ON RESET (POR LATCH CLOCK AND S SAWTOOTH GENERATOR OVP + - + SOFT- START - AND FAULT LOGIC + - D/A + E/A - CURRENT CORRECTION I_TOT + + + - I_TRIP OC GND ...
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... Typical Application - Two Phase Converter Using a HIP6602 Gate Driver FB COMP V VSEN CC ISEN1 PGOOD PWM1 EN MAIN VID3 CONTROL HIP6304 VID2 VID1 PWM2 VID0 ISEN2 FS/DIS GND 3 HIP6304 +12V PVCC BOOT UGATE VCC PHASE DRIVER +5V PWM HIP6601 LGATE GND +12V BOOT PVCC UGATE VCC PHASE DRIVER HIP6601 PWM ...
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... ERROR AMPLIFIER CORRECTION - + - + PROGRAMMABLE + REFERENCE DAC - I AVERAGE - + - + CORRECTION FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE HIP6304 VOLTAGE AND CURRENT CONTROL LOOPS FOR A TWO POWER CHANNEL REGULATOR Functional Pin Description 1 16 VID3 VID2 VID1 3 VID0 COMP FS/DIS 8 VID3 (Pin 1), VID2 (Pin 2), VID1 (Pin 3) and VID0 (Pin 4) Voltage Identification inputs from microprocessor ...
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... Over-Current Trip Level POWER GOOD MONITOR Under-Voltage Threshold Under-Voltage Threshold PGOOD Low Output Voltage PROTECTION Over-Voltage Threshold Percent Over-Voltage Hysteresis 5 HIP6304 Thermal Information Thermal Resistance (Typical, Note 1) + 0.3V SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CC Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . .150 Maximum Storage Temperature Range . . . . . . . . . . -65 Maximum Lead Temperature (Soldering 10s .300 ...
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... A single resistor converts and scales the voltage across the MOSFETs to a current that is applied to the Current Sensing circuit within the HIP6304. Output from these sensing circuits is applied to the current averaging circuit. Each PWM channel receives the difference current signal from the summing circuit that compares the average sensed current to the individual channel current. When a power channel’ ...
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... PGOOD voltage. Note that Figure 5 shows the 12V gate driver voltage available before the 5V supply to the HIP6304 has reached its threshold level. If conditions were reversed and the 5V supply was to rise first, the start-up sequence would be different ...
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... PWM outputs into a three state mode. This condition results in the gate driver removing drive to the output stages. The HIP6304 goes into a wait delay timing cycle that is equal to the Soft- Start ramp time. PGOOD also goes “low” during this time due to VSEN going below its threshold voltage ...
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... Current Sensing and Balancing Overview The HIP6304 samples the on-state voltage drop across each synchronous rectifier FET, Q2 indication of the inductor current in that phase, see Figure 7. Neglecting AC effects (to be discussed later), the voltage drop across Q2 is simply r (Q2) x inductor current (I ...
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... IN voltage ID The inductor, or load current, flows alternately from V through Q1 and from ground through Q2. The HIP6304 samples the on-state voltage drop across each Q2 transistor to indicate the inductor current in that phase. The voltage drop is sampled 1 switching period, 1/F turned OFF and Q2 is turned on. Because of the sawtooth current component, the sampled current is different from the average current per phase ...
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... As discussed previously, the voltage drop across each Q2 transistor at the point in time when current is sampled is r (Q2 The voltage at Q2’s drain, the DSON SAMPLE PHASE node, is applied through the R HIP6304 ISEN pin. This pin is held at virtual ground, so the current into ISEN is (Q2 SENSE SAMPLE ...
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... ISLAND ON POWER PLANE LAYER LEGEND FIGURE 11. PRINTED CIRCUIT BOARD POWER PLANES AND ISLANDS 12 HIP6304 with lower ESR available in larger case sizes. However, the equivalent series inductance (ESL) of these capacitors increases with case size and can reduce the usefulness of the capacitor to high slew-rate transient loading. ...
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... Use a mix of input bypass capacitors to control the voltage overshoot across the MOSFETs. Use ceramic capacitance for the high frequency decoupling and bulk capacitors to 13 HIP6304 supply the RMS current. Small ceramic capacitors should be placed very close to the drain of the upper MOSFET to suppress the voltage induced in the parasitic circuit impedances ...
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... For information regarding Intersil Corporation and its products, see web site www.intersil.com Sales Office Headquarters NORTH AMERICA Intersil Corporation P. O. Box 883, Mail Stop 53-204 Melbourne, FL 32902 TEL: (321) 724-7000 FAX: (321) 724-7240 14 HIP6304 M16. LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE SYMBOL L ...