IR3080 International Rectifier, IR3080 Datasheet
IR3080
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IR3080 Summary of contents
Page 1
... ICs” which each drive and monitor a single phase of a multiphase TM converter. The XPhase to design while providing higher efficiency than conventional approaches. The IR3080 is intended for desktop applications and includes the VCCVID and VRHOT functions required for proper system operation. FEATURES • ...
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... ORDERING INFORAMATION Device IR3080MTR * IR3080M * Samples only ABSOLUTE MAXIMUM RATINGS Operating Junction Temperature……………..150 Storage Temperature Range………………….-65 ESD Rating……………………………………..HBM Class 1C JEDEC standard ...
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... Applies to all VID codes and -0.3V ≤ VOSNS- ≤ 0.3V. Note 41.9kΩ ROSC Note 1 Note 1 VBIAS–VEAOUT (referenced to VBIAS) Normal operation or Fault mode V(VDRP) – V(IIN), 0.8V ≤ V(IIN) ≤ 5.5V Note 1 IR3080 ≤ 14V, 2.0V ≤ VIDPWR ≤ 5.5V and 0 CC MIN TYP MAX 0 ...
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... ROSC -5mA ≤ I(VBIAS) ≤ 0 With FB = 0V, adjust V(SS/DEL) until EAOUT drives high = 41.9kΩ ROSC I(PWRGD) = 4mA -150mA ≤ I(VCCVID) ≤ 0 I(VCCVID) = -20mA I(VCCVID) = -150mA Voltage I(VIDPGD) = 4mA V(VIDPGD) = 5.5V IR3080 MIN TYP MAX UNIT 255 300 345 kHz ...
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... TEST CONDITION Start – Stop VID0-5 Open, I(VCCVID -0.3V ≤ VOSNS- ≤ 0.3V, All VID Codes I(VRHOT) = 29mA V(VRHOT) = 5.5V ≥ MIN o ≥ 4.73mV 4.73mV 1.176V IR3080 MIN TYP MAX 8.6 9.1 9.6 8.4 8.9 9.4 150 200 300 400 550 1000 -5.5 -4.5 -3.5 -2 -0.5 1 300 ...
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... Open Collector output that drives low during Softstart and any external fault condition. Connect external pull-up. 31 VIDPGD Open Collector output of the VCCVID Power Good circuitry. Connect external pull- up. 32 VIDDEL Connect an external capacitor to LGND to program the VCCVID Power Good delay Page IR3080 TM during transition to a lower VID code. 9 /30/04 ...
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... CURRENT SHARE IR3086 PHASE 0.1uF IC CCS RCS CURRENT SHARE IR3086 PHASE 0.1uF IC CCS RCS ADDITIONAL PHASES Figure 1. System Block Diagram IR3080 VCCVID (1.2V@150mA) VID PWRGD VR HOT VCC PWRGD CIN VOUT SENSE+ VOUT+ COUT VOUT- VOUT SENSE- INPUT/OUTPUT 9 /30/04 ...
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... GENERATOR RAMPIN- EAIN RPHS2 PWMRMP RPWMRMP RAMP DISCHARGE SCOMP CLAMP CPWMRMP SHARE CSCOMP ADJUST ERROR AMPLIFIER + ISHARE 10K 20mV - DACIN Figure 2. PWM Block Diagram IR3080 PHASE IC PWM LATCH GATEH S PWM RESET COMPARATOR DOMINANT - R GATEL + ENABLE + BODY - BRAKING COMPARATOR X 0.91 CURRENT SENSE CSIN+ ...
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... PWM ramps are referenced to VDAC. Figure 4 depicts PWM operating waveforms under various conditions. Page 50% RAMP DUTY CYCLE SLOPE = 80mV / % DC SLOPE = 1.6mV / ns @ 200kHz SLOPE = 8.0mV / ns @ 1MHz CLK1 CLK2 CLK3 CLK4 CLK5 CLK6 CLK7 CLK8 Figure 3. 8 Phase Oscillator Waveforms IR3080 9 /30/04 ...
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... I I MAX MIN = T SLEW V O − MAX MIN T SLEW + BODYDIODE IR3080 DUTY CYCLE DECREASE DUE TO LOAD DECREASE (BODY BRAKING) OR FAULT (VCC UV, VCCVID UV, OCP, VID=11111X /30/04 STEADY-STATE OPERATION ...
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... PWM ramp thereby increasing its duty cycle and output current. The crossover frequency of the current share loop can be programmed with a capacitor at the SCOMP pin so that the share loop does not interact with the output voltage loop. Page Current Sense Amp CSOUT IR3080 /30/04 ...
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... IR3080 THEORY OF OPERATION Block Diagram The Block diagram of the IR3080 is shown in Figure 6, and specific features are discussed in the following sections. VCC - START + STOP + 9.1V VCC UVLO COMPARATOR VID DELAY 8.9V - COMPARATOR VIDDEL IVTTDEL 66uA 90mV + ICHG OFF 4V 70uA - IDISCHG SS/DEL ON DISCHARGE 6uA SS/DEL ...
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... The IR3080 can accept changes in the VID code while operating and vary the DAC voltage accordingly. The sink/source capability of the VDAC buffer amplifier is programmed by the same external resistor that sets the oscillator frequency. The slew rate of the voltage at the VDAC pin can be adjusted by an external capacitor between VDAC pin and the VOSNS- pin ...
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... Table 1 - Voltage Identification (VID) is selected to program the desired amount of fixed offset voltage below the FB . When the load current increases, the adaptive DRP IR3080 VID3 VID2 VID1 VID0 VID5 ...
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... Amplifier Phase IC VDRP - IIN ISHARE ISHARE ISHARE ISHARE + VDAC Figure 8. Adaptive voltage positioning Control IC Error Amplifier VDAC + EAOUT - FB IFB RFB2 RDRP AVP Amplifier VDRP - IIN IIN + IR3080 Current Sense Amplifier CSIN+ + CSIN- - 10k Current Sense Amplifier CSIN+ + CSIN- - 10k Vo RFB Rt 9 /30/04 ...
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... Figure 10. VCC VID linear regulator using external transistor Soft Start, Over-Current Fault Delay, and Hiccup Mode The IR3080 has a programmable soft-start function to limit the surge current during the converter start-up. A capacitor connected between the SS/DEL and LGND pins controls soft start as well as over-current protection delay and hiccup mode timing ...
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... LOAD AND VID CHANGES) Under Voltage Lockout (UVLO) The UVLO function monitors the IR3080’s VCC supply pin and ensures that IR3080 has a high enough voltage to power the internal circuit. The IR3080’s UVLO is set higher than the minimum operating voltage of compatible Phase ICs thus providing UVLO protection for them as well ...
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... VBIAS voltage, which should be used to program the Phase IC trip points to minimize phase delay errors. Thermal Monitoring (VRHOT) The IR3080 senses its own die temperature and produces a voltage at the input of the VRHOT comparator that is proportional to temperature. An external resistor divider connected from VBIAS to the HOTSET pin and ground can be used to program the thermal trip point of the VRHOT comparator ...
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... IC VRHOT 5 ISHARE CSCOMP RBIASIN 20k 1 RMPIN+ 2 IR3086 RMPIN- 3 PHASE HOTSET 4 IC VRHOT 5 ISHARE CSCOMP Figure 12. IR3080/IR3086 Six Phase VRD 10 Converter IR3080 VCCVID POWERGOOD VRHOT VIDPGD 0.1uF RCS- CCS+ CCS- RCS+ DBST3 CBST2 CIN VOUT SENSE+ 15 VCCH 14 GATEH L 13 PGND VOUT+ ...
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... DESIGN PROCEDURES - IR3080 AND IR3086 CHIPSET IR3080 EXTERNAL COMPONENTS Oscillator Resistor Rosc The oscillator of IR3080 generates a triangle waveform to synchronize the phase ICs, and the switching frequency of the each phase converter equals the oscillator frequency, which is set by the external resistor R the curve in Figure 13. ...
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... MAX TOFST CS ∗ ∗ ∗ ∗ IR3080 − 6 − ∗ DEL ( 7) − VDAC VDAC VDAC UP is the source current of VDAC pin as SOURCE (8) (9) (10) and room temperature L_MAX )] (11) ROOM − ...
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... Control IC Over Temperature Setting Resistors R The threshold voltage of VRHOT comparator is proportional to the die temperature T shown in Equation (18). Determine the relationship between the die temperature of IR3080 and the temperature of the power converter according to the power loss, PCB layout and airflow, etc. Then calculate the VRHOT threshold voltage corresponding to the temperature ...
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... J can be calculated as follows. HOTSET2 ∗ HOTSET − V BIAS HOTSET and R PHASE1 PHASE2 is determined as: PHASEx2 ∗ R PHASEx PHASEx 1 − PHASEx IR3080 and calculate R CS+ (21) should be added between the amplifier inverting (22) CS+ (ºC) of phase IC. Determine J (23) (24) (25) 9 /30/04 as CS+ should be less ...
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... BIAS PHASEx 1 − BIAS HOTSET ∗ BIAS PHASEx 1 − BIAS HOTSET DRP and C CP IR3080 R and R PHASE1, PHASE2 PHASE3 and R and connect HOTSET pin PHASEx2, (26) (27) PHASEx and R PHASEx2 (28) (29) and C removed. DRP from Equations (30) and (31), where /30/04 ...
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... Equation (34), and determine C FB1 ∗ DRP and C from Equations (37) and (38 IR3080 CCP1 RFB RCP CCP CFB FB - EAOUT EAOUT VDAC RDRP + CDRP (30) (31) is the equivalent resistance of inductor DCR. (32) (33) (34) (35) (36) 9 /30/04 and FB ...
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... ROOM LE CI π 6 ∗ ∗ PWMRMP SW PWMRMP − − DAC I DAC IR3080 (37) (38) and capacitor C are not needed. Choose DRP (39) (40) (41) (42) (43) (44) ) based on the (45) ( 46) 9 /30/04 ...
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... Phase Number: n=6 Switching Frequency: f =400 kHz SW Output Inductors: L=220 nH, R =0.47 mΩ L Output Capacitors: AL-Polymer, C=560uF, R IR3080 EXTERNAL COMPONENTS Oscillator Resistor Rosc Once the switching frequency is chosen, R frequency of 400kHz per phase, choose R VID Delay Capacitor C VIDDEL Given VID delay time t =2.5mS VID − ...
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... Adaptive Voltage Positioning Resistor R FB =30.1kΩ. OSC ∗ ∗ − ∗ TOFST IR3080 VDAC =30.1kΩ) is 76uA. Calculate the OSC − 6 ∗ − = Ω 100 − 6 ∗ − 101 41uA with ...
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... CS+ CS+ CS Ω Ω , Choose R =6.19kΩ CS- and R HOTSET1 HOTSET2 − 3 ∗ 116 . 1 241 . ∗ Ω − and R PHASE1 PHASE2 IR3080 HOTSETC2 =20.0kΩ, HOTSETC1 , and calculate the PWMRMP )] =16.2kΩ PWMRMP CS- , CS- 9 /30/04 ...
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... IR3080 =0.637 starting from down- PHASE6 = R =10kΩ, PHASE61 =7.87kΩ, R =17.4kΩ PHASE62 . CP − 6 ∗ ∗ ∗ ∗ ( 560 365 Ω − − 3 ...
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... Phase Number: n=6 Switching Frequency: f =800 kHz SW Output Inductors: L=100 nH, R =0.5 mΩ L Output Capacitors: Ceramic, C=22uF, R IR3080 EXTERNAL COMPONENTS Oscillator Resistor Rosc Once the switching frequency is chosen, R frequency of 800kHz per phase, choose R VID Delay Capacitor C VIDDEL Given VID delay time t =2.5mS VID − ...
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... Adaptive Voltage Positioning Resistor R FB =13.3kΩ. OSC ∗ ∗ − − ∗ − − IR3080 ms VDAC =13.3kΩ) is 170uA. Calculate the OSC − 6 ∗ − = Ω 100 − 6 ∗ − 101 ...
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... R CS+ CS+ CS Ω Ω − 3 ∗ 116 . 1 241 . =0.206, RA =0.401 and RA PHASE4 PHASE5 IR3080 HOTSETC2 =10.0kΩ, HOTSETC1 , and calculate the PWMRMP )] Ω CS- , CS- R and R PHASEx1, PHASEx2 PHASEx3 PHASE1 =0.597 starting from down- PHASE6 9 /30/04 =0.665, ...
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... PHASE43 576 − π 6 ∗ ∗ ∗ ∗ ∗ 162 Ω Choose C =5.6nF ∗ 110 − 9 ∗ 576 IR3080 Ω ∗ Ω 887 = 146 kHz − /30/04 ...
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... − 3 π 3500 * 22 − 4 π − ∗ ∗ 105 * . 3500 IR3080 − 6 ∗ ∗ ∗ 162 * . − and calculate SCOMP 011 . − ...
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... Control bus signals, VDAC, RMPOUT, IIN, VBIAS, and especially EAOUT, should not cross over the fast transition nodes. Page OCSET VDAC VDAC VCC SS/DEL IR3080 and R . Avoid using any via for the CC/DEL 9 /30/04 ...
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... Copper (≥ 0.1mm for 1 oz. Copper and ≥ 0.23mm for 3 oz. Copper) • A single 0.30mm diameter via shall be placed in the center of the pad land and connected to ground to minimize the noise effect on the IC. Page IR3080 9 /30/04 ...
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... Ensure that the solder resist in-between the lead lands and the pad land is ≥ 0.15mm due to the high aspect ratio of the solder resist strip separating the lead lands from the pad land. • The single via in the land pad should be tented with solder resist 0.4mm diameter, or 0.1mm larger than the diameter of the via. Page IR3080 9/30/04 ...
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... The maximum length and width of the land pad stencil aperture should be equal to the solder resist opening minus an annular 0.2mm pull back to decrease the incidence of shorting the center land to the lead lands when the part is pushed into the solder paste. Page IR3080 9/30/04 ...
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... ROSC (K Ohm) IR3080 100 100 ISINK ISOURCE 130 140 FB, BBFB, OCSET Bias Current VDAC Sink Current VDAC Source Current ...
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... C/W, θ JA Data and specifications subject to change without notice. This product has been designed and qualified for the Consumer market. Qualification Standards can be found on IR’s Web site. Visit us at www.irf.com for sales contact IR3080 C/W JC TAC Fax: (310) 252-7903 information.www.irf.com ...