ISL6560 Intersil Corporation, ISL6560 Datasheet
ISL6560
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ISL6560 Summary of contents
Page 1
... Data Sheet Microprocessor CORE Voltage Regulator Two-Phase Buck PWM Controller The ISL6560 two-phase current mode, PWM control IC together with companion gate drivers, the HIP6601A, HIP6602A, HIP6603A or HIP6604 and MOSFETs provides a precision voltage regulation system for advanced microprocessors. Two-phase power conversion is a marked ...
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... VID4 (Pin 1), VID3 (Pin 2), VID2 (Pin 3), VID1 (Pin 4) and VID0 (Pin 5) Voltage Identification inputs from microprocessor. These pins respond to TTL and 3.3V logic signals. The ISL6560 decodes VID bits to establish the output voltage. See Table 1. COMP (Pin 6) Output of the internal transconductance error amplifier. ...
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... Frequency Variation CT Charging Current CT Charging Current ERROR AMPLIFIER Output Resistance Transconductance Output Current 3 ISL6560 Thermal Information Thermal Resistance (Note 1) SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum Junction Temperature (Plastic Package 150 Maximum Storage Temperature Range . . . . . . . . . -65 Maximum Lead Temperature (Soldering 10s 300 (SOIC - Lead Tips Only) ...
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... ISL6560 SYMBOL TEST CONDITIONS Forced COMP(MAX) OUT V COMP(OFF) V FB(LOW) BW COMP = Open ERR V CS+ = VCC, FB Forced to V CS(TH) 0.8 ≤ COMP ≤ ≤ 375mV V CS(FOLD ≤ V ≤ 3V ...
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... A single current sampling resistor the input side of the supply monitors the current SENSE for both channels via a comparator within the ISL6560. A single comparator insures that both channels are monitored by the same circuitry, helping to balance the operating current of each channel. During normal operation the comparator is tripped by the peak inductor current, terminating the conduction cycle ...
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... If the reference voltage is set low by the same amount the no-load starting voltage will be low by that same amount reference is provided within the ISL6560. A voltage divider is established by two external series resistors connected between the reference voltage, REF and ground. ...
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... Design Example This section will highlight a 40A converter, providing the design details for the entire supply. The hardware realization of this design is the ISL6560/62 Evaluation Board. For this example a 40A supply down converting from 12V will be discussed. 5V operation is also viable as an input source. ...
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... They must provide enough energy to prevent the input voltage from dropping due to load transients. In addition, the 8 ISL6560 high peak currents can cause heating of these capacitors and can result in premature failure if not properly designed. The value of the RMS current that these capacitors must share can be approximated with the aid of the curve of Figure 7 ...
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... This delay will cause the current ramp to be slightly greater than predicted by the equation. This means that the initial setting should be slightly reduced to account for the increase in current. 9 ISL6560 Once the value for R that make up the voltage divider must be determined. Figure 8 shows the equations to determine the resistor network that makes up R · ...
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... C13 R5 FIGURE 10. SCHEMATIC DIAGRAM OF A 40A SUPPLY USING THE ISL6560 CONTROLLER AND HIP6601 GATE DRIVERS PC Board Layout Considerations Like all high-current supplies where low-voltage control signals in the millivolt range must live with high voltage and high-current switching signals, PC board layout becomes crucial in obtaining a satisfactory supply ...
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... VCC pin by more than the specified limit of VCC + 0.3V. Voltage Sampling 1. To obtain optimum regulation use the Kelvin connection for the input voltage sample as shown in Figure 11. The ground connection, Pin 9 of the ISL6560 should be connected to the system ground at the load. 12V +V IN ...
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... ISL6560 Supply Design Sequence Please note several changes from the computations in the body of the data sheet. An operating frequency of 400kHz was chosen. A 15mV offset voltage was added to the no- load output voltage to show the design procedure. ISL6560 Supply Design Sequence A. Specifications: Output Current: ...
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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 13 ISL6560 M16.15 (JEDEC MS-012-AC ISSUE C) 16 LEAD NARROW BODY SMALL OUTLINE PLASTIC ...