ISL6315 INTERSIL [Intersil Corporation], ISL6315 Datasheet
ISL6315
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ISL6315 Summary of contents
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... Outstanding features of this controller IC include programmable VID codes compatible with Intel VRM9, VRM10, as well as AMD’s Hammer microprocessors, along with a system regulation accuracy of ±1%. The ISL6315, though, does not intrinsically allow for load-line regulation (no droop). Important features of this controller IC include a set of sophisticated overvoltage and overcurrent protection ...
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Block Diagram OVP WHILE DISABLED 1.65V/1.95V + - OVP + 200mV - COMP VID0 VID1 VID2 TTL D/A CONVERTER VID3 (VID DAC) EA VID4 DACSEL/VID5 + VRM10 - FB OFFSET SOURCE GND OFS ENLL VCC SSEND POWER-ON RESET (POR) OSCILLATOR ...
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... VID0 VRM10 R ISEN ISEN SSEND R’ OFS ISL6315 ENLL OFS R OFS COMP ISL6315 ISL6315 CHANNEL1 DAC CHANNEL2 ISL6315 HFIN1 C F2 PVCC BOOT1 C BOOT1 UGATE1 Q1 PHASE1 Q2 LGATE1 BOOT2 C BOOT2 C HFIN2 UGATE2 Q3 PHASE2 LGATE2 Q4 PGND GND Q1 Q2 ...
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... ERROR AMPLIFIER DC Gain (Note 3) Gain-Bandwidth Product (Note 3) Slew Rate (Note 3) Maximum Output Voltage Minimum Output Voltage OVERCURRENT PROTECTION Overcurrent Trip Level 4 ISL6315 ISL6315 Thermal Information Thermal Resistance QFN Package (Notes 1, 2 0.3V Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150°C BOOT - 0. 0.3V Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C BOOT Maximum Lead Temperature (Soldering 10s 300° ...
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... PGND pin. VID0-4 (Pins 2, 1, 24-22) Voltage identification inputs from microprocessor. These pins respond to TTL logic thresholds. The ISL6315 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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... Channel Balance Current Loop Read information. 6 ISL6315 ISL6315 UGATE1, 2 (Pins 19, 12) Connect these pins to the upper MOSFETs’ gates. These pins are used to control the upper MOSFETs and are monitored for shoot-through prevention purposes. Maximum individual channel duty cycle is limited to 66%. ...
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... R2 C2 ERROR FB AMP R1 ISL6315 FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE ISL6315 VOLTAGE AND CURRENT FEEDBACK 7 ISL6315 ISL6315 CHANNEL BALANCE CURRENT LOOP The current balance control loop works in a similar fashion to the voltage control loop, but with current control information applied individually to each channel’s PWM circuit. The ...
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... RMS current based on load current and duty cycle. The figure is provided as an aid in determining the optimal input capacitor solution. PWM OPERATION One switching cycle for the ISL6315 is defined as the time between consecutive PWM pulse terminations (turn-off of the upper MOSFET on a channel). Each cycle begins when is ...
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... DS(ON) FIGURE 4. OVERCURRENT BEHAVIOR IN HICCUP MODE OUTPUT VOLTAGE SETTING The ISL6315 uses a digital to analog converter (DAC) to gen- erate a reference voltage based on the logic signals at the VID pins. The DAC decodes the 5 or 6-bit logic signals into one of the discrete voltages shown in Tables Each VID pin is pulled internal 1.2V voltage by weak current sources (about 45µ ...
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... ISL6315 ISL6315 TABLE 2. VRM9 VOLTAGE IDENTIFICATION CODES VID4 VID0 VDAC 1 0 1.150 1 1 1.175 1 0 1.200 1 1 1.225 1 0 1.250 1 1 1.275 1 0 1.300 1 1 1.325 ...
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... DYNAMIC VID (VID-ON-THE-FLY) 0 1.0625 The ISL6315 is capable of executing on-the-fly output 1 1.0750 voltage changes. The way the ISL6315 reacts to a change in 0 1.0875 the VID code is dependent on the VID configuration 1.1000 VRM9 or AMD Hammer settings, the ISL6315 checks for ...
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... ISL6315 from starting before the bias voltage at VCC and PVCC reach the rising POR thresholds, as defined in Electrical Specifications. The POR levels are sufficiently high to guarantee that all parts of the ISL6315 can perform their , is dependent on DVID functions properly once bias is applied to the part. While bias ...
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... DAC-set VID voltage, and f DAC switching frequency (typically 222kHz). The ISL6315 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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... C E ⋅ ⋅ 2π The compensation network consists of the error amplifier (internal to the ISL6315) and the external R1-R3, C1-C3 components. The goal of the compensation network is to provide a closed loop transfer function with high 0dB crossing frequency (F ; typically 0 margin (better than 45°). Phase margin is the difference ...
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... MOSFETs Given the fixed switching frequency of the ISL6315 and the integrated output drives, the selection of MOSFETs revolves closely around the current each MOSFET is required to conduct, the capability of the devices to dissipate heat, as well as the characteristics of available heat sinking ...
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... Next are small signal components that connect to sensitive nodes or supply critical bypassing current and signal coupling. . Thus, P-P Note that as the ISL6315 does not allow external adjustment of the channel-to-channel current balancing (current information is multiplexed across a single ⋅ OUT OUT ⋅ ...
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... EMI pick-up important to place the R terminal of the ISL6315. A multi-layer printed circuit board is recommended. Figure shows the connections of the critical components for one output channel of the converter ...
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... ESL is not a specified parameter. Consult the capacitor manufacturer and/or measure the capacitor’s impedance with frequency to help select a suitable component. 18 ISL6315 Output Inductor Selection One of the parameters limiting the converter’s response to a load transient is the time required to change the inductor current ...
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... For bulk capacitance, several electrolytic or high-capacity MLC capacitors may be needed. For surface mount designs, solid tantalum capacitors can be used, but caution must be exercised with regard to the capacitor surge current rating. These capacitors must be capable of handling the surge- current at power-up. 19 ISL6315 O O 0.4 0 FN9222 ...
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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 20 ISL6315 L24.4x4B 24 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VGGD-2 ISSUE C) ...