isl6306 Intersil Corporation, isl6306 Datasheet
isl6306
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isl6306 Summary of contents
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... MARKING (°C) ISL6306CRZ* ISL6306 CRZ 6x6 QFN (Note) ISL6306CRZ-TK ISL6306 CRZ 6x6 QFN (Note) ISL6306IRZ* ISL6306 IRZ - 6x6 QFN (Note) *Add “-T” suffix for tape and reel. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets ...
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... Pinout VID6 VID5 VID4 VID3 VID2 VID1 VID0 VRSEL OFS DAC 2 ISL6306 ISL6306 (40 LD QFN) TOP VIEW GND ISEN3+ 29 ISEN3- 28 ISEN2- 27 ISEN2+ 26 PWM2 25 PWM4 24 ISEN4+ 23 ISEN4- 22 ISEN1- ...
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... ISL6306CR Block Diagram VDIFF VR_RDY RGND x1 VSEN OVP SOFT-START +175mV FAULT LOGIC SS OFFSET OFS REF DAC VRSEL VID7 VID6 VID5 DYNAMIC VID4 VID D/A VID3 VID2 VID1 VID0 COMP FB IDROOP VR_HOT THERMAL MONITORING VR_FAN TM 3 ISL6306 CLOCK AND AND SAWTOOTH GENERATOR ∑ ...
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... ISEN3+ VID2 ISEN3- VID1 PWM4 VID0 ISEN4+ ISEN4- VRSEL VR_FAN GND VR_HOT TM EN_PWR TCOMP OFS OFS +12V NTC 4 ISL6306 DS(ON) +12V V CC PVCC ISL6612 PWM DRIVER +5V +12V V CC PVCC ISL6612 PWM DRIVER +12V V CC BOOT PVCC ISL6612 PWM DRIVER ...
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... VID2 ISEN3- VID1 PWM4 VID0 ISEN4+ ISEN4- VRSEL VR_FAN GND VR_HOT TM EN_PWR TCOMP OFS FS SS +5V + OFS R S +12V NTC 5 ISL6306 DS(ON) +12V V CC PVCC ISL6612 PWM DRIVER +5V +12V V CC PVCC ISL6612 PWM DRIVER +12V V CC BOOT PVCC ISL6612 PWM DRIVER ...
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... ISEN3+ VID2 ISEN3- VID1 PWM4 VID0 ISEN4+ ISEN4- VRSEL VR_FAN GND VR_HOT TM EN_PWR TCOMP OFS FS SS +5V R OFS R T +12V NTC 6 ISL6306 +12V V CC PVCC ISL6612 PWM DRIVER +5V +12V V CC PVCC ISL6612 PWM DRIVER +12V V CC BOOT PVCC ISL6612 PWM DRIVER ...
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... ISEN3- VID1 PWM4 ISEN4+ VID0 ISEN4- VRSEL VR_FAN GND VR_HOT TM EN_PWR TCOMP OFS FS SS +5V + OFS R S +12V NTC 7 ISL6306 +12V V CC PVCC ISL6612 PWM DRIVER +5V +12V V CC PVCC ISL6612 PWM DRIVER +12V V CC BOOT PVCC ISL6612 PWM DRIVER +12V ...
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... Operating Conditions Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V ±5% Ambient Temperature (ISL6306CRZ 0°C to +70°C Ambient Temperature (ISL6306IRZ .-40°C to +85°C CAUTION: Stress above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied ...
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... Operating Conditions: V PARAMETER DAC Sink Current REF Source Current REF Sink Current PIN-ADJUSTABLE OFFSET Voltage at OFS pin of ISL6306CRZ Voltage at OFS pin of ISL6306IRZ OSCILLATORS Accuracy of Switching Frequency Setting Adjustment Range of Switching Frequency (Note 4) Soft-Start Ramp Rate Adjustment Range of Soft-start Ramp Rate (Note 4) ...
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... Spec guaranteed by design. 5. During soft-start, VDAC rises from 0 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. 10 ISL6306 = 5V, Unless Otherwise Specified (Continued) CC TEST CONDITIONS With 1.25k resistor pull-up to VCC, I ...
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... ICs. When EN_PWR is driven above 0.875V, the ISL6306 is active depending on status of EN_VTT, the internal POR, and pending fault states. Driving EN_PWR below 0.745V will clear all fault states and prime the ISL6306 to soft-start when re-enabled. EN_VTT This pin is another threshold-sensitive enable input for the controller. It’ ...
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... The ISL6306 controller helps reduce the complexity of implementation by integrating vital functions and requiring minimal output components. The block diagrams on pages and 7 provide top level views of multiphase power conversion using the ISL6306 controller ...
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... RMS current for comparison. PWM Operation The timing of each channel is set by the number of active channels. The default channel setting for the ISL6306 is four. The switching cycle is defined as the time between PWM pulse termination signals of each channel. The pulse termination signal is an internally generated clock signal which triggers the falling edge of PWM signal ...
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... SAMPLE CURRENT, I SWITCHING PERIOD TIME FIGURE 3. SAMPLE AND HOLD TIMING Current Sensing The ISL6306 supports inductor DCR sensing, MOSFET r sensing, or resistive sensing techniques. The DS(ON) internal circuitry, shown in Figures 4, 5, and 6, represents one channel of an N-channel converter. This circuitry is repeated for each channel in the converter, but may not be active depending on the status of the PWM3 and PWM4 pins, as described in the PWM Operation section ...
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... Positive Temperature Coefficient (PTC) resistor can be R ISEN(n) selected for the sense resistor R temperature compensation function of ISL6306 should be utilized. The integrated temperature compensation function is described in the Temperature Compensation section. Channel-Current Balance The sensed current I summed together and divided by the number of active channels ...
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... DAC) and offset errors in the OFS current source, remote-sense and error amplifiers. Intersil specifies the guaranteed tolerance of the ISL6306 to include the combined tolerances of each of these elements. The output of the error amplifier, V COMP sawtooth waveform to generate the PWM signals ...
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... ISL6306 TABLE 1. VR10 VID TABLE (WITH 6.25mV EXTENSION) VID4 VID6 VOLTAGE 400mV 6.25mV ( 1 1.59375 1.5875 1.58125 1.575 1.56875 ...
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... ISL6306 TABLE 1. VR10 VID TABLE (WITH 6.25mV EXTENSION) VID6 VOLTAGE VID4 6.25mV (V) 400mV 1 0 1.11875 1.1125 1.10625 1 1.09375 OFF 0 ...
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... ISL6306 VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 VOLTAGE 0 0 1.46250 1.45625 1.45000 1.44375 1.43750 1.43125 1.42500 ...
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... ISL6306 VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 VOLTAGE 0 0 0.96250 0.95625 0.95000 0.94375 0.93750 0.93125 0.92500 ...
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... ISEN 21 ISL6306 Output-Voltage Offset Programming The ISL6306 allows the designer to accurately adjust the offset voltage. When a resistor, R OFS to VCC, the voltage across it is regulated to 1.6V. This causes a proportional current (I R OFS regulated to 0.4V, and I between DAC and REF, R product (I These functions are shown in Figure 9 ...
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... When all conditions above are satisfied, ISL6306 begins the soft-start and ramps the output voltage to 1.1V first. After remaining at 1.1V for some time, ISL6306 reads the VID EXTERNAL CIRCUIT code at VID input pins. If the VID code is valid, ISL6306 will regulate the output to the final VID setting. If the VID code is +12V VCC OFF code, ISL6306 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, the ISL6306 will again TD5 command the lower MOSFETs to turn on. The ISL6306 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 the ISL6306 is reset ...
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... Overcurrent Protection ISL6306 has two levels of overcurrent protection. Each phase is protected from a sustained overcurrent condition on a delayed basis, while the combined phase currents are protected on an instantaneous basis. In instantaneous protection mode, the ISL6306 utilizes the sensed average current I to detect an overcurrent AVG condition ...
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... C) Integrated Temperature Compensation When TCOMP voltage is equal or greater than VCC/15, ISL6306 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 17 TM1 ...
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... N > 4, the larger TCOMP factor N, the larger the difference between the NTC temperature and the temperature of the current sense component. ISL6306 multiplexes the TCOMP factor N with the TM digital signal to obtain the adjustment gain to compensate the temperature impact on the sensed channel current. The compensated channel current signal is used for droop and overcurrent protection functions ...
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... N An additional term can be added to the lower-MOSFET loss equation to account for additional loss accrued during the 27 ISL6306 dead time when inductor current is flowing through the lower-MOSFET body diode. This term is dependent on the diode forward voltage at I frequency, f the beginning and the end of the lower-MOSFET conduction interval respectively ...
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... V ∑ DROOP R ISEN and (OPTIONAL COMP FB + IDROOP DROOP - VDIFF LOAD-LINE REGULATED ISL6306 CIRCUIT , has already been chosen The target 0 (EQ. 32) 0 FN9226.1 December 8, 2006 ...
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... LC 0 (EQ. 33) IN FIGURE 20. COMPENSATION CIRCUIT FOR ISL6306 BASED LC FB The first step is to choose the desired bandwidth, f compensated system. Choose a frequency high enough to assure adequate transient performance but not higher than L 1/3 of the switching frequency. The type-III compensator has ...
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... Input Supply Voltage Selection The VCC input of the ISL6306 can be connected either directly to a +5V supply or through a current limiting resistor to a +12V supply. An integrated 5.8V shunt regulator maintains the voltage on the VCC pin when a +12V supply is used. A 300Ω resistor is suggested for limiting the current into the VCC pin to a worst-case maximum of approximately 25mA ...
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... O/ FIGURE 23. NORMALIZED INPUT-CAPACITOR RMS CURRENT vs DUTY CYCLE FOR SINGLE-PHASE CONVERTER 31 ISL6306 For a two phase design, use Figure 21 to determine the input-capacitor RMS current requirement given the duty cycle, maximum sustained output current (I of the per-phase peak-to-peak inductor current (I Select a bulk capacitor with a ripple current rating which will minimize the total number of input capacitors required to support the RMS current calculated ...
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... The ISL6306 can be placed off to one side or centered relative to the individual phase switching components. Routing of sense lines and PWM signals will guide final placement. Critical small signal components to place close to the controller include the ISEN resistors, R feedback resistor, and compensation components ...
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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 33 ISL6306 4X 4.5 36X 0. 40X ± BOTTOM VIEW ± SIDE VIEW ( 36X ...