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The low-side FETs will remain on until the output voltage is isp6260 down below 0. RS is determined through an understanding of both the DC and transient load currents. The modulator at the heart of this power system is derived from Intersil’s Robust Ripple Regulator technology, R 3 Compared with the traditional multiphase buck regulator, the R 3 technology multiphase converter has faster transient response.
VSS Signal ground; Connect to local controller ground. The selection of Cn may require a slight adjustment to correct for layout inconsistencies and component tolerance. For overcurrent less that 2.
ISL6260 PDF Datasheet浏览和下载
A 47pF capacitor can be used for such purposes. This total current is typically ? The overcurrent and way-overcurrent protection level in two-to-one phase mode operation will be adjusted as two-to-one as well. These are labeled RS and RO.
A current reduction on NTC pin and 40mV voltage increase on threshold voltage of the comparator in this state. But those caps are only available in small capacitance values. For example, if the PC board trace on one phase is 0. Datasheey Rights Reserved All other trademarks mentioned are the property of their respective owners.
Multiphase Core Regulator For IMVP-6 Mobile CPUs
This current is used during Soft-Start. Now, the input to the Droop amplifier is the Vrsense voltage.
When discrete resistor sensing is used, a capacitor of 10nF should be placed in parallel with RL to properly compensate the current balance circuit. There are provisions to correct the current imbalance due ial6260 layout or to purposely divert current to certain phase for better thermal management. The voltage on NTC pin decreases to a level lower than 1.
Programmable 1, 2 or 3 Power Channels? For information regarding Intersil Corporation and its products, see www. Too high of a resistor will cause an error to the output voltage regulation because of bias current flowing in the FB pin.
Do not connect any other dataasheet to this pin. As load is further reduced, channel switching frequency will drop, providing optimized efficiency at light loading.
We call this gain, G1. When the temperature goes down, the NTC thermistor voltage will eventually go up. Fault protection is summarized in Adtasheet 3.
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Attention has be paid to the input resistor to the FB pin. As all the phases shares the same hysteretic window voltage, it also ensures excellent dynamic current balance between phases. We use Equation It is better to keep this resistor below 3k when using this file.
The second level of overvoltage protection datashedt differently. The Rfset resistor that sets up the switching frequency of the 21 Isl620 A high level logic signal on this pin enables the regulator. FB This pin is the inverting input of error amplifier. The synthesized inductor current ripple datasehet compares with the window voltage and generates PWM signal.
Electrical Specifications Operating Conditions: Datahseet shown if present is a non-functional feature. At load current step up, the switching frequency is increased resulting in a faster response than conventional fixed frequency PWM controllers. Customer can put a resistor in parallel with the current sensing capacitor on the phase of interest in order to purposely increase the current in that phase.
Combining these requirements gives: Overcurrent protection is related to the voltage droop which is determined by the load line requirement. The comparator changes polarity and turns SW1 off and throws SW2 to 1. In the above analysis, the current Solving for Cn we now have Equation There are two levels of overvoltage isl660 with different response.
As a rule of thumb we start with datasheeh voltage drop across the Rn network, VN, to be 0. Intersil Pb-free plus anneal products employ special Pb-free. RTN Remote voltage sensing return. It should be noted that the switching frequency in the Electrical Specification Table is tested with the error amplifier output or Comp pin voltage at 2V.
Figure 48 shows the equivalent circuit of a discrete current sense approach. If the system ixl6260 not compensated correctly, the output voltage could sag excessively upon load application and potentially create a system failure. The user should have 40A load current on the converter and look for 84mV droop. VSEN Remote core voltage sense input.
Voltage Regulator Thermal Throttling lntel? This is shown in Figure