ISL6566 Intersil Corporation, ISL6566 Datasheet
ISL6566
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ISL6566 Summary of contents
Page 1
... The output voltage can also be positively or negatively offset through the use of a single external resistor. A unique feature of the ISL6566 is the combined use of both DCR and r current sensing. Load line voltage DS(ON) ...
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... Ordering Information PART NUMBER ISL6566CRR5184 ISL6566CR ISL6566CR-TR5184 ISL6566CR ISL6566CRZR5184 (Note) ISL6566CRZ ISL6566CRZ-TR5184 (Note) ISL6566CRZ ISL6566CRZAR5184 (Note) ISL6566CRZ ISL6566CRZA-TR5184 (Note) ISL6566CRZ ISL6566IR ISL6566IR ISL6566IR-T ISL6566IR ISL6566IRZ (Note) ISL6566IRZ ISL6566IRZ-T (Note) ISL6566IRZ ISL6566IRZA (Note) ISL6566IRZ ISL6566IRZA-T (Note) ISL6566IRZ NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...
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... OVP OVP V OVP +150mV x 0.82 VID4 VID3 VID2 DYNAMIC VID VID1 D/A VID0 VID12.5 VRM10 REF E/A FB COMP OFS OFFSET 3 ISL6566 ISL6566 PGOOD 100µA OC +1V SOFT-START AND FAULT LOGIC 0.2V CLOCK AND SAWTOOTH GENERATOR ∑ PWM1 ∑ PWM2 ∑ PWM3 CHANNEL 1 CURRENT N BALANCE ∑ ...
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... Typical Application - ISL6566 FB VDIFF VSEN RGND +5V VCC OFS FS REF ISL6566 VID4 VID3 VID2 VID1 VID0 VID12.5 VRM10 PGOOD +12V GND ENLL IREF OCSET ICOMP 4 ISL6566 ISL6566 +12V COMP PVCC1 BOOT1 UGATE1 PHASE1 ISEN1 LGATE1 +12V PVCC2 BOOT2 UGATE2 PHASE2 ISEN2 LGATE2 ...
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... Typical Application - ISL6566 with NTC Thermal Compensation FB VDIFF VSEN RGND +5V VCC OFS FS REF ISL6566 VID4 VID3 VID2 VID1 VID0 VID12.5 VRM10 PGOOD +12V GND ENLL IREF OCSET ICOMP 5 ISL6566 ISL6566 +12V COMP PVCC1 BOOT1 UGATE1 PHASE1 ISEN1 LGATE1 +12V PVCC2 BOOT2 ...
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... VCC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V ±5% PVCC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . +5V to 12V ±5% Ambient Temperature (ISL6566CR, ISL6566CRZ 0°C to 70°C Ambient Temperature (ISL6566IR, ISL6566IRZ .-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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... Upper Drive Sink Resistance Lower Drive Source Resistance Lower Drive Sink Resistance OVER TEMPERATURE SHUTDOWN Thermal Shutdown Setpoint (Note 3) Thermal Recovery Setpoint (Note 3) NOTE: 3. Parameter magnitude guaranteed by design. Not 100% tested. 7 ISL6566 ISL6566 TEST CONDITIONS R = 10K to ground 100pF 10K to ground 100pF, Load = ± ...
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... RUGATE t Q1 CHANNEL1 Q2 DAC Q3 CHANNEL2 Q4 ISL6566 Q5 CHANNEL3 Q6 GND GND is the bias and reference ground for the IC. ENLL This pin is a threshold-sensitive (approximately 0.66V) enable input for the controller. Held low, this pin disables controller operation. Pulled high, the pin enables the controller for operation. ENLL has a internal 1.0µ ...
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... These are the inputs for the internal DAC that provides the reference voltage for output regulation. These pins respond to TTL logic thresholds. The ISL6566 decodes the VID inputs to establish the output voltage; see VID Tables for correspondence between DAC codes and output voltage settings. These pins are internally pulled high, to approximately 1.2V, by 40µ ...
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... The ISL6566 controller helps simplify implementation by integrating vital functions and requiring minimal external components. The block diagram on page 3 provides a top level view of multi-phase power conversion using the ISL6566 controller ...
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... PWM Operation The timing of each converter leg is set by the number of active channels. The default channel setting for the ISL6566 is three. One switching cycle is defined as the time between the internal PWM1 pulse termination signals. The pulse termination signal is the internally generated clock signal that triggers the falling edge of PWM1 ...
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... SENSING CIRCUITRY FOR CURRENT BALANCE The ISL6566 senses the channel load current by sampling the voltage across the lower MOSFET r Figure 5. A ground-referenced operational amplifier, internal to the ISL6566, is connected to the PHASE node through a resistor The voltage across R ISEN the voltage drop across the r ...
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... ISL6566 TABLE 3. VRM9 VOLTAGE IDENTIFICATION CODES (Continued) VID0 VDAC VID4 1 1.325 0 0 1.350 0 1 1.375 0 0 1.400 0 1 1.425 0 0 1.450 1 1.475 TABLE 4. VRM10 VOLTAGE IDENTIFICATION CODES 0 1.500 ...
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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 ISL6566 to include the combined tolerances of each of these elements. 14 ISL6566 VID12 ...
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... IREF pin is recommended to help reduce any noise affects on the current sense amplifier due to layout. Output-Voltage Offset Programming (EQ. 7) The ISL6566 allows the designer to accurately adjust the offset voltage by connecting a resistor, R pin to VCC or GND. When R and VCC, the voltage across it is regulated to 1.5V. This causes a proportional current (I and out of the FB pin ...
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... DAC inputs and respond to on-the-fly VID changes in a controlled manner, supervising a safe output voltage transition without discontinuity or disruption. The DAC mode the ISL6566 is operating in determines how the controller responds to a dynamic VID change. When in VRM10 mode the ISL6566 checks the VID inputs six times every switching cycle ...
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... Once this threshold is reached, proper operation of all aspects of the ISL6566 is guaranteed. Hysteresis between the rising and falling thresholds assure that once enabled, the ISL6566 will not inadvertently turn off unless the bias is the number of voltage drops substantially (see Electrical term is defined as the Specifications) ...
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... SS where V switching frequency. The ISL6566 also has the ability to start up into a pre- charged output, without causing any unnecessary disturbance. The FB pin is monitored during soft-start, and should it be higher than the equivalent internal ramping reference voltage, the output drives hold both MOSFETs off. ...
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... The LGATE outputs remain high until VDIFF falls to within the overvoltage limits explained above. The ISL6566 will continue to protect the load in this fashion as long as the overvoltage condition recurs. Once an overvoltage condition ends the ISL6566 continues PGOOD normal operation and PGOOD returns high ...
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... IREF to increase. If the voltage on IREF exceeds “VDIFF+1V”, the controller will shut down. Once the voltage on IREF falls below “VDIFF+1V”, the ISL6566 will restart at the beginning of soft-start. Overcurrent Protection The ISL6566 detects overcurrent events by comparing the ...
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... QFN package is approximately 4W at room temperature. See Layout Considerations paragraph for thermal transfer improvement suggestions. DS(ON) When designing the ISL6566 into an application recommended that the following calculation is used to ensure safe operation at the desired frequency for the selected MOSFETs. The total gate drive power losses, ...
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... EXT2 N Q1 Current Balancing Component Selection The ISL6566 senses the channel load current by sampling the voltage across the lower MOSFET r Figure 17. The ISEN pins are denoted ISEN1, ISEN2, and ISEN3. The resistors connected between these pins and the respective phase nodes determine the gains in the channel- current balance loop ...
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... COMP , it will most likely be COMP to obtain the desired full S . ∆V ∆V 1 ∆I and (OPTIONAL COMP VDIFF LOAD-LINE REGULATED ISL6566 CIRCUIT , using the (EQ. 28 OUT I TRAN ISL6566 FN9178.4 March 9, 2006 ...
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... PWM comparator (see Figure 20). Keep a position available for C , and be prepared to install a high ISL6566 frequency capacitor of between 22pF and 150pF in case any leading edge jitter problem is noted. Output Filter Design The output inductors and the output capacitor bank together to form a low-pass filter responsible for smoothing the pulsating voltage at the phase nodes ...
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... SWITCHING FREQUENCY (kHz) FIGURE 21 SWITCHING FREQUENCY T 25 ISL6566 Input Capacitor Selection The input capacitors are responsible for sourcing the ac component of the input current flowing into the upper MOSFETs. Their RMS current capacity must be sufficient to . This MAX handle the ac component of the current drawn by the upper MOSFETs which is related to duty cycle and the number of active phases ...
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... VCC and PVCC, and many of the components surrounding the controller including the feedback network and current sense components. Locate the VCC/PVCC bypass capacitors as close to the ISL6566 as possible especially important to locate the components associated with the feedback circuit close to their respective controller pins, since they belong to a high-impedance circuit loop, sensitive to EMI pick-up ...
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... Thermal Management For maximum thermal performance in high current, high switching frequency applications, connecting the thermal GND pad of the ISL6566 to the ground plane with multiple vias is recommended. This heat spreading allows the part to achieve its full thermal potential also recommended that the controller be placed in a direct path of airflow if possible to help thermally manage the part ...
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... VID0 VID12.5 VRM10 PGOOD +12V GND ENLL IREF OCSET ICOMP R COMP R OCSET C COMP FIGURE 25. PRINTED CIRCUIT BOARD POWER PLANES AND ISLANDS 28 ISL6566 LOCATE CLOSE TO IC (MINIMIZE CONNECTION PATH) +12V COMP PVCC1 (CF2) BOOT1 C BOOT1 UGATE1 PHASE1 ISEN1 R ISEN1 LGATE1 +12V PVCC2 ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. 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 29 ISL6566 L40.6x6 40 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VJJD-2 ISSUE C) ...