ISL6557ACBZ Intersil, ISL6557ACBZ Datasheet
ISL6557ACBZ
Specifications of ISL6557ACBZ
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ISL6557ACBZ Summary of contents
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... Pb-free available Ordering Information PART NUMBER ISL6557ACB ISL6557ACBZ (See Note) *Add “-T” suffix to part number for tape and reel packaging. NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which is compatible with both SnPb and Pb-free soldering operations ...
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Block Diagram RGND - VSEN + - x 0.9 2.1V AND FAULT COMP 2.5V VID0 VID1 DYNAMIC VID2 VID D/A VID3 VID4 FB IOUT I_TOT 2 ISL6557A VDIFF VCC PGOOD POWER-ON RESET (POR ...
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Typical Application - 4-Phase Buck Converter FB IOUT COMP VDIFF VCC VSEN EN RGND PGOOD ISEN1 VID4 ISL6557A PWM1 VID3 PWM2 VID2 ISEN2 VID1 PWM3 VID0 ISEN3 FS PWM4 RT ISEN4 GND 3 ISL6557A +12V VCC BOOT PVCC HIP6601A DRIVER ...
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Absolute Maximum Ratings Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Electrical Specifications Operating Conditions: V PARAMETER ISEN Overcurrent Trip Level PROTECTION and MONITOR Overvoltage Threshold VSEN Rising VSEN Falling Undervoltage Threshold VSEN Rising VSEN Falling PGOOD Low Voltage IPGOOD = 4mA NOTES: 2. These parts are designed and adjusted for ...
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COMP ERROR AMPLIFIER - FB + DAC & REFERENCE I OUT + VDIFF RGND VSEN FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE ISL6557A IN A 3-PHASE CONVERTER Operation Multi-Phase Power Conversion Multi-phase power conversion provides the most ...
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Figure 2 (previous page) illustrates the multiplicative effect on output ripple frequency. The three channel currents (IL1, IL2, and IL3), combine to form the AC ripple current and the DC load current. The ripple component has three times the ripple ...
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... In order to fully realize the thermal advantage important that each channel in a multi-phase converter be controlled to deliver about the same current at any load level. Intersil multi-phase controllers guarantee current balance by comparing each channel’s current to the average current delivered by all channels and making an appropriate adjustment to each channel’ ...
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... DAC) plus offset errors in the remote-sense and error amplifiers. Intersil specifies the guaranteed tolerance of the ISL6557A and all Intersil controllers to include all variations in the amplifiers and reference so that the output voltage remains within the specified system tolerance. ...
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... Once the output voltage falls to the level set by the VID code, the PWM outputs enter high-impedance mode. The Intersil drivers respond by turning off both upper and lower MOSFETs. If the overvoltage condition reoccurs, the ISL6557A will again command the lower MOSFETs to turn on ...
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During the soft-start interval, the soft-start voltage, V increases linearly from zero to 140% of the programmed DAC voltage. At the same time a current source, I decreasing from 160μA down to zero. These signals are connected as shown in ...
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... It is assumed that the reader is familiar with many of the basic skills and techniques referenced below. In addition to this guide, Intersil provides complete reference designs that include schematics, bills of materials, and example board layouts for all common microprocessor applications ...
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Finally, the resistive part of the upper MOSFET’s is given in Equation UP ⎛ ⎞ ⎜ ⎟ --------- - ( ) ----- - UP 4 ...
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The feedback resistor has already been chosen as out- FB lined in Load-Line Regulation Resistor. Select a target band- width for the compensated system must be large enough to assure adequate transient perfor- mance, but smaller ...
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In Equations 21 the per-channel filter inductance divided by the number of active channels the sum total of all output capacitors; ESR is the equivalent-series resistance of the bulk output-filter capacitance; and V the peak-to-peak sawtooth ...
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Application on page 3). Figure 14 and Equation 26 are provided to assist in the selecting the correct value for RT. 1000 100 10 10 100 SWITCHING FREQUENCY (KHZ) FIGURE 14 SWITCHING FREQUENCY [ ] ( ) 11.09 ...
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0.5 I L, 0.75 I L,PP O L,PP 0.2 0 0.2 0.4 0.6 DUTY CYCLE ( FIGURE 17. NORMALIZED INPUT-CAPACITOR RMS ...
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... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. 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 ...