isl6334d Intersil Corporation, isl6334d Datasheet
isl6334d
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isl6334d Summary of contents
Page 1
... VR11.1, 4-Phase PWM Controller with Phase Dropping, Droop Disabled and Load Current Monitoring Features The ISL6334D controls voltage regulator by driving interleaved synchronous-rectified buck channels in parallel. This multiphase architecture results in multiplying channel ripple frequency and reducing input and output ripple currents. ...
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... Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. Pinout VID6 VID5 VID4 VID3 VID2 VID1 VID0 PSI# OFS IMON 2 ISL6334D PART TEMP. RANGE MARKING (°C) - +70 ISL6334D (40 LD QFN) TOP VIEW GND ...
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... ISL6334D Block Diagram VDIFF RGND - X1 + VSEN SOFT-START + OVP - FAULT LOGIC +175mV SS VID7 VID6 VID5 DYNAMIC VID4 VID VID3 D/A VID2 VID1 VID0 DAC OFS OFFSET REF FB COMP 1.11V + OCP - IMON 1.11V VR_HOT THERMAL MONITOR VR_FAN TM 3 ISL6334D VR_RDY FS PSI# CLOCK AND RAMP GENERATOR ...
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... PWM3 ISEN3- VR_HOT VIN ISEN3+ EN_PWR +5V GND PWM4 IMON ISEN4- ISEN4+ TCOMP TM OFS FS +5V +5V NTC NTC: NTHS0805N02N6801, 6.8kΩ, VISHAY 4 ISL6334D +12V PVCC VCC ISL6612 DRIVER PWM REF +12V PVCC VCC ISL6612 DRIVER PWM +12V PVCC VCC ISL6612 DRIVER PWM +12V SS PVCC ...
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... ISEN2+ PSI# VR_FAN ISEN2- VR_HOT VIN EN_PWR PWM4 +5V GND ISEN4- ISEN4+ IMON TCOMP TM OFS FS +5V NTC 5V NTC: NTHS0805N02N6801, 6.8kΩ, VISHAY 5 ISL6334D +12V VCC DAC GND REF ISL6614 DRIVER PWM1 PWM1 PWM2 PWM3 +12V PWM2 VCC GND ISL6614 DRIVER SS PWM1 5V PWM2 VIN ...
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... All Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . GND -0. Operating Conditions Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V ±5% Ambient Temperature ISL6334DCRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C Ambient Temperature ISL6334DIRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty ...
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... Overcurrent Trip Level for Average Current At Normal CCM PWM Mode Overcurrent Trip Level for Average Current at PSI# Mode Peak Current Limit for Individual Channel IMON Clamped and OCP Trip Level 7 ISL6334D TEST CONDITIONS Offset resistor connected to ground Voltage below VCC, offset resistor connected to VCC R = 100kΩ ...
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... During soft-start, VDAC rises from 0V to 1.1V first and then ramp to VID voltage after receiving valid VID. 6. Soft-start ramp rate is determined by the adjustable soft-start oscillator frequency at the speed of 6.25mV per cycle. 8 ISL6334D TEST CONDITIONS With external pull-up resistor connected to VCC With 1.24k resistor pull-up to VCC, I ...
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... When EN_VTT is driven above 0.875V, the ISL6334D is active depending on status of the EN_PWR, the internal POR, and pending fault states. Driving EN_VTT below 0.745V will clear all fault states and prime the ISL6334D to soft-start when re-enabled. VDIFF, VSEN and RGND - VSEN and RGND form the precision differential remote-sense amplifier ...
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... The ISL6334D controller helps reduce the complexity of implementation by integrating vital functions and requiring minimal output components. The block diagrams on pages page 3, 4, and 5 provide top level views of multiphase power conversion using the ISL6334D controller ...
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... PWM and PSI# Operation The timing of each channel is set by the number of active channels. The default channel setting for the ISL6334D is four. The switching cycle is defined as the time between PWM pulse termination signals of each channel. The cycle time of the pulse signal is the inverse of the switching frequency set by the resistor between the FS pin and ground ...
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... SWITCHING FREQUENCY (Hz) FIGURE 3. SWITCHING FREQUENCY vs RT Current Sensing The ISL6334D senses current continuously for fast response. The ISL6334D supports inductor DCR sensing, or resistive sensing techniques. The associated channel current sense amplifier uses the ISEN inputs to reproduce a signal proportional to the inductor current, I current proportional to the inductor current ...
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... DAC) and offset errors in the OFS current source, remote-sense and error amplifiers. Intersil specifies the guaranteed tolerance of . SENSE the ISL6334D to include the combined tolerances of each of these elements The output of the error amplifier ...
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... ISL6334D VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 VOLTAGE DIFF OFF OFF 1.60000 0 ...
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... ISL6334D VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 VOLTAGE 1 0 1.20000 1.19375 1.18750 1.18125 1.17500 1.16875 1.16250 ...
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... Output-Voltage Offset Programming The ISL6334D allows the designer to accurately adjust the offset voltage. When a resistor connected between OFS OFS to VCC, the voltage across it is regulated to 1.6V. This causes a proportional current ( flow into OFS. If OFS R is connected to ground, the voltage across it is ...
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... ISL6334D begins the soft-start and ramps the output voltage to 1.1V first. After remaining at 1.1V for some time, ISL6334D reads the VID code at VID input pins. If the VID code is valid, ISL6334D will regulate the output to the final VID setting. If the 17 ISL6334D VID code is OFF code, ISL6334D will shut down, and cycling VCC, EN_PWR or EN_VTT is needed to restart ...
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... MOSFETs. If the overvoltage condition reoccurs, ISL6334D will again command the lower depending on the MOSFETs to turn on. ISL6334D will continue to protect the load in this fashion as long as the overvoltage condition occurs. Once an overvoltage condition is detected, normal PWM operation ceases until ISL6334D is reset ...
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... If one channel current exceeds the reference current, ISL6334D will pull PWM signal of this channel to low for the rest of the switching cycle. This PWM signal can be turned on next cycle if the sensed channel current is less than the 129µ ...
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... T2 and T1 can be found from the NTC datasheet. Temperature Compensation The ISL6334D supports inductor DCR sensing, or resistive sensing techniques. The inductor DCR has a positive temperature coefficient, which is about +0.385%/°C. Since the voltage across inductor is sensed for the output current ...
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... Integrated Temperature Compensation When the TCOMP voltage is equal or greater than VCC/15, ISL6334D will utilize the voltage at TM and TCOMP pins to compensate the temperature impact on the sensed current. The block diagram of this function is shown in Figure 15 TM1 NON-LINEAR TM A NTC ...
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... The external temperature compensation network can only compensate the temperature impact on the IMON voltage, while it has no impact to the sensed current inside ISL6334D. Therefore, this network cannot compensate for the temperature impact on the overcurrent protection function. General Design Guide ...
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... Compensation (EQ. 26) The ISL6334D converter can be accurately modeled as a voltage-mode regulator with two poles at the L-C resonant frequency and a zero at the ESR frequency. A type III controller, as shown in Figure 17, provides the necessary compensation. ...
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... ESL. As the load current increases, the voltage drop across the ESR increases linearly until the load current reaches its final 24 ISL6334D can value. The capacitors selected must have sufficiently low ESL 0 and ESR so that the total output-voltage deviation is less than the allowable maximum ...
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... DUTY CYCLE (V O/ FIGURE 19. NORMALIZED INPUT-CAPACITOR RMS CURRENT vs DUTY CYCLE FOR 3-PHASE CONVERTER 25 ISL6334D FIGURE 20. NORMALIZED INPUT-CAPACITOR RMS CURRENT For a 2-phase design, use Figure 18 to determine the input capacitor RMS current requirement given the duty cycle, maximum sustained output current (I per-phase peak-to-peak inductor current (I ...
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... No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 26 ISL6334D Next, place the input and output capacitors. Position one high frequency ceramic input capacitor next to each upper MOSFET drain ...
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... Package Outline Drawing L40.6x6 40 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 3, 10/06 6.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 27 ISL6334D 4X 4.5 36X 0. 40X ± BOTTOM VIEW ± SIDE VIEW ( 36X ...