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HIP6302EVAL1;中文规格书,Datasheet资料


TM

HIP6302EVAL1 - Multiphase Power Conver for AMD Athlon Processors up to
Application Note February 2002

AN

Author: Ma

Introduction
Each generation of computer microprocessor brings performance advances in computing power. Performance improvements are made possible by advances in fabrication technology that enable greater device density. Newer processors are operating at lower voltages and higher clock speeds both of which contribute to greater demands on the microprocessor core voltage supply in terms of higher peak currents and higher current-slew rates. Intersil’s family of multi-phase DC-DC converter solutions provide the ideal solution to supply the core-voltage needs of present and future high-performance microprocessors.

provides feedback for droop compensation and ov protection. A ?ve-bit DAC provides a digital interfac program the 1% accurate reference and a window comparator toggles PGOOD if the output voltage i range and acts to protect the load in case of over v For more detailed descriptions of the HIP6302 fun refer to the HIP6302 Data Sheet [1].

Intersil HIP6302 and HIP6601
The HIP6302 controller IC works with two HIP6601A or HIP6603A single-channel driver ICs or a single HIP6602A dual-channel driver IC [3] to form a highly integrated solution for high-current, high slew-rate applications. The HIP6302 regulates output voltage, balances load currents and provides protective functions for two synchronous-recti?ed buck-converter channels.
PGOOD 15 VCC 16 POWER-ON RESET (POR) THREE STATE OV LATCH x 1.15 OVP + S CLOCK AND SAWTOOTH GENERATOR 8 FS/DIS

The HIP6601A is a driver IC capable of delivering u gate-charging current for rapidly switching both MO a synchronous-recti?ed bridge. The HIP6601A acc single logic input to control both upper and lower M Adaptive shoot-through protection is provided on b switching edges to provide optimal dead time, and circuitry permits greater enhancement of the uppe MOSFET. For a more detailed description of the H refer to the HIP6601A Data Sheet [2].

PVCC VCC

7 6 +5V 10k

2

1

PWM

3 CONTROL LOGIC 10k SHOOT THROUGH PROTECTION

8

VSEN

10 x 0.9

UV + -

5

4 GND

FIGURE 2. HIP6601A BLOCK DIAGRAM
SOFT START AND FAULT LOGIC COMP VID4 VID3 VID2 VID1 VID0 6 1 2 3 4 5 PWM

+ -


+

13 PWM1

+ PWM 12 PWM2

The HIP6302EVAL1 Board and Refe Design


-

DAC

+ -

E/A

+ -

With the VID jumpers set to 1.7V (00110), the eval board meets the output voltage and current speci? indicated in Table 1.

CURRENT DETECTION

TABLE 1. HIP6302EVAL1 OUTPUT PARAMETE MIN
14 ISEN1 11 ISEN2

FB 7



+ 9 GND

Static Regulation Transient Regulation Over-Voltage Protection Continuous Load Current Over-Current Trip Level Load-Current Transient

1.65V 1.60V 1.90V 41A -

+

FIGURE 1. HIP6302 BLOCK DIAGRAM

The integrated high-bandwidth error ampli?er provides voltage regulation, while current-sense circuitry maintains phase-current balance between the two power channels and 1

3

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handlin 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersi Copyright ? Intersil Americas Inc. 2002. All R

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Application Note AN9888
The HIP6302EVAL1 evaluation board incorporates a reference design intended to meet the core-voltage requirements for AMD Athlon? microprocessors up to 35A. Additional circuitry is provided to facilitate circuit evaluation including input and output power connectors, VID jumpers, numerous probe points, an LED power-good indicator, and a load-transient generator.

Start Up

Powering the HIP6302EVAL1
For convenience, the HIP6302EVAL1 provides two methods of making input power connections. The 20-pin header, J1, interfaces with a standard ATX power supply and may be the most convenient method of powering the board. J2, J3, and J4 are standard banana-jack connectors that can be used to supply power using bench-top power supplies. These inputs provide greater versatility in testing and design validation by allowing the 12V and 5V power-input voltage levels to be varied independently. In this way power-on level and power-sequencing issues can be easily examined. To start the evaluation board, insert the 20-pin connector from an ATX supply into J1. If using bench-top supplies, connect a 12V supply to J2 and a 5V supply to J3. Connect the grounds from both supplies to J4.

The waveforms in Figure 3 demonstrate the norma sequence with the HIP6302EVAL1 connected to a load. After FS/EN is released, VCORE exhibits a lin until reaching its 1.7V set point. The gradual increa VCORE over approximately 5ms limits the current from the input supply, ICC5, to a level that does not supply. The HIP6302 asserts PGOOD once VCOR regulation limits.

FS/EN, 5V/DIV 0V

VCORE, 1V

0V

ICC5, 10A/DI

0A PGOOD, 5V/DIV 0V

1ms/DIV

Important
There are two things to consider when using bench-top supplies. If the 5V supply is applied prior to the 12V supply, the HIP6302 will begin operating before the HIP6601As. This allows the HIP6302 to complete its soft-start cycle before the drivers are capable of switching power to the output. When the 12V power input is then applied, there is a large transient as the controller tries to instantly bring the output to its fullvoltage level. This can result in an overcurrent protection cycle and an abnormal start-up waveform. It can be avoided by applying 5V supply after or at the same time as the 12V supply or by using an ATX power supply. The second problem can occur when operating the transient load generator. Not all bench-top and ATX power supplies are capable of responding to load transients, and they may allow a momentary voltage dip on VCC5. This can activate the power-on-reset function in the HIP6302 and cause the output power to cycle. It can be remedied by connecting a 5600?F or larger capacitor between VCC5 and ground. The capacitor, if necessary, simulates the distributed capacitance that exists on the computer motherboard.

FIGURE 3. HIP6302EVAL1 START-UP WAVEFO

Transient Response

The HIP6302EVAL1 is equipped with a load-transi generator that applies a 0–36A transient load curre rise and fall rates of approximately 35A/?s. The du the transient is between 100?s and 200?s, and the rate is kept low in order to limit power dissipation in MOSFETs and resistors. Removal of the HI/LO jum causes the current to decrease from about 36A to 31A. The load-transient generator operates when t HIP6302EVAL1 is properly connected to a 12V po source and SW1 is in the ON position. Operation c when SW1 is moved into the OFF position or 12V removed from the board.

The HIP6302EVAL1 achieves the speci?ed transie performance while maintaining a favorable balance low cost, high ef?ciency and small pro?le. When th cycle changes rapidly in response to a transient loa the inductor current immediately begins to change meet the demand. During the time the inductor cur increasing, the output-?lter capacitors are supplyin load. It follows that the amount of required capacita decreases as the capability of the inductors to rap assume the load current increases.

2

Athlon? is a trademark of Advanced Micr

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Application Note AN9888
Figure 4 shows the core voltage, inductor current, and PWM signals changing in response to the transient load current. The upper waveform shows the core voltage deviating from its no-load setting of 1.72V to a minimum of about 1.62V upon the application of current. The voltage then settles to its 1.67V full-load setting. On load removal, the core voltage peaks at a level of 1.78V before settling again to its 1.72V no-load setting. Although the speci?ed operating range allows deviations as low as 1.60V and as high as 1.85V, a minimum of 20mV is reserved to allow for the reference tolerance and the tolerances of other components that contribute to the overall system accuracy.

The close up in Figure 6 shows the core-voltage, i current and PWM signals changing in response to trailing edge of the transient load current. Again, th cycles immediately decrease to zero, and the indu begin shedding load current at the maximum rate. the inductor currents brie?y go negative as the tran settles. The capacitors are slightly over charged at the transient, and the discharge path is in the reve direction through the inductors.

CORE VOLT 50mV/DIV 1.7V

CORE VOLTAGE, 50mV/DIV 1.7V

INDUCTOR CURRE 10A/DIV INDUCTOR CURRENTS, 10A/DIV 0A 0V 0A 0V 0V 0V PWM1, 10V/DIV

PWM2, 10V/D 5?s/DIV

PWM1, 10V/DIV PWM2, 10V/DIV 20?s/DIV

FIGURE 6. TRANSIENT-RESPONSE TRAILING E

Overcurrent Protection

FIGURE 4. HIP6302EVAL1 TRANSIENT RESPONSE

Figure 5 is a close-up showing the core-voltage, inductorcurrent and PWM signals responding at the leading edge of the transient load current. The PWM signals increase to their maximum duty cycle of 75% on the ?rst pulse following the start of the transient. The inductor currents begin to increase immediately and are carrying all of the load within 10?s. The very fast transient response is due to the precision 18MHz error ampli?er and optimal compensation of the control loop.

When the current out of either ISEN pin exceeds 8 HIP6302 detects an overcurrent condition and resp placing the PWM outputs into a high-impedance s signals the HIP6601 to turn off both upper and low MOSFETs in order to remedy the overcurrent cond behavior is seen in Figure 7 where PWM1 goes imm 2.5VDC when the output current reaches approxima The output voltage then quickly falls to zero.

1.7V CORE VOLTAGE, 50mV/DIV INDUCTOR CURRENTS, 10A/DIV 0V

OUTPUT CUR 20A/DIV 0A

CORE VOLTA 500mV/DIV

PWM1, 5V/DIV 0A 0V 0V PWM1, 10V/DIV PWM2, 10V/DIV 50?s/DIV 5?s/DIV 0V

FIGURE 7. OVERCURRENT BEHAVIOR

FIGURE 5. TRANSIENT-RESPONSE LEADING EDGE

3

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Application Note AN9888
After the initial over-current trip, the HIP6302 waits for a period of time equal to 2048/fSW (fSW is the switching frequency) before initiating a soft-start cycle. If the over-load condition remains, another over-current trip will occur before the end of the soft-start sequence. This repetitive overcurrent cycling is illustrated in Figure 8, and will continue inde?nitely unless the fault is cleared or power to the converter is removed. Because of the wait period, the worst case power delivered during overcurrent cycling is equal to 45% of the power delivered during normal operation at full load. Therefore, inde?nite over-current cycling does not create a thermal problem for the circuit.

Summary

The HIP6302EVAL1 is intended to provide a conve platform to evaluate the performance of the HIP63 HIP6601A chip set in the speci?c implementation i in Table 1. The design demonstrates a favorable tra between low cost, high ef?ciency, and small footpr following pages include schematic, bill of materials layout drawings to facilitate implementation of this The evaluation board is simple and convenient to o and test points are available to evaluate the most c tested parameters. Example waveforms are given reference.

OUTPUT CURRENT, 20A/DIV

The HIP6302 and HIP6601A provide a versatile 2power solution for low-voltage applications from 25 approximately 40A, and together they result in the effective solution available.

References
0A CORE VOLTAGE, 500mV/DIV

For Intersil documents available on the internet, se http://www.intersil.com/ Intersil Technical Support 1 (888) INTERSIL

[1] HIP6302 Data Sheet, Intersil Corporation, Pow Management Products Division, 2000. (http://www.intersil.com/).
0V 5ms/DIV

FIGURE 8. OVERCURRENT BEHAVIOR

[2] HIP6601A, HIP6603A Data Sheet, Intersil Cor Power Management Products Division, 2000.

Ef?ciency
Figure 9 shows the ef?ciency versus current plot for the HIP6302EVAL1 for 5A through 35A. The measurements were made at room temperature with natural convection cooling only..
90

[3] HIP6602A Data Sheet, Intersil Corporation, Po Management Products Division, 2000.

85 EFFICIENCY (%)

80

75

70 5 10 15 20 25 30 35 CURRENT (AMPERES)

FIGURE 9. EFFICIENCY vs CURRENT

4

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Application Note AN9888 Schematic
5VIN 12VIN 16 C7 0.1?F 9 C6 1?F 6 VCC GND PWM1 13 3 7 VCC PVCC 2 L1 1? F C3 0.1?F C4 1? F Q1 HUF76139 L2 450nH Q2 HUF76139 TP2 TP1 C9 1? F C10 100?F C2 1000?F C5 100?F C1 1000?F

BOOT 1 UGATE 8 5

PWM PHASE

HIP6601
TP3 JP1 1 2 3 4 5 VID4 VID3 VID2 VID1 VID0 C12 1? F ISEN1 14 LGATE GND 4 U1

R1 2.15k?

HIP6302

C8 0.1?F 6 7 2 VCC PVCC BOOT 1 UGATE 8 Q3 HUF76139 L3 450nH Q4 HUF76139 TP6

15

PGOOD

PWM2

12 TP4

3

PWM PHASE

HIP6601

LGATE 5 GND 4 U3

FS/DIS R3 107k? COMP 6 FB 7 R4 14.0k? TP7 C11 2.2nF R6 45.3k? C13-C17 22?F C18-C21 560?F ISEN2 VSEN 10 R5 1.00k? 11 R2 2.15k? TP5

JP2 C48 1?F Q7 HUF76129 R8 10k? R7 1k? RED R9 1k? GREEN CR1 Q5 2N7002 Q6 HUF76129 TP11 R17 46.4k? R18 400? Q8 2N7002 C49 10?F 4 7 1 VDD 2 HB 6 LI HO 3 LO HI 8

U4 HIP2100
HS VSS

SW1

R15 0.200?

R14, R16 0.100?

O

POWER GOOD INDICATOR

O

R12 R10 D1 BAV99 1.50k? R11 619? TRANSIENT GENERATOR 619? D2 BAV99 1.50k? R13

5

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Application Note AN9888 Bill of Materials
QTY 1 2 3 5 2 1 5 4 2 24 2 1 5 1 1 1 2 1 2 1 2 4 2 2 2 1 1 1 1 2 1 2 2 2 1 1 1 1 6 3 2 2 1 1 J1 J2, J3 J4 J5, J6 L1 L2, L3 Q1, Q2, Q3, Q4 Q5, Q8 Q6, Q7 R1, R2 R3 R4 R5 R6 R7, R9 R8 R10, R12 R11, R13 R14, R16 R15 R17 R18 SW1 JP2 CR1 C1, C2 C3, C7, C8 C4, C6, C9, C12, C48 C5, C10 C11 C13-C17, C49 C19, C20, C22, C23 C18, C21 C24-C47 D1, D2 JP1 REFERENCE DESCRIPTION RED/GREEN LED 1000?F, 10V, Aluminum Capacitor 0.1?F, 25V, Y5V, Ceramic Capacitor 1.0?F, 25V, Y5V, Ceramic Capacitor 100?F, 16V, OS-CON Capacitor 2.2nF, 50V, X7R, Ceramic Capacitor 10?F, 10V, X7R, Ceramic Capacitor 560?F, 4V, OS-CON Capacitor Spare Spare Dual Diode 5-Position Jumper Header Jumpers 1-Position Header Jumper ATX Power Header Female Banana Connector, Red Female Banana Connector, Black Terminal Connector 1uH, T30-26, 6T AWG18 450nH, T60-8/90, 5T AWG14 Power MOSFETs General Purpose MOSFET Power MOSFET Resistor, 2.15k?, 1%, 1/10W Resistor, 107k?, 1%, 1/10W Resistor, 14.0k?, 1%, 1/10W Resistor, 1.00k?, 1%,1/10W Resistor, 45.3k?, 1%, 1/10W Resistor, 1.0k?, 5%, 1/8W Resistor, 10k?, 5%, 1/10W Resistor, 1.50k?, 1%, 1/8W Resistor, 619?, 1%, 1/8W Resistor, 0.100?, 1%, 1W Resistor, 0.200?, 1%, 1W Resistor, 46.4k?, 1%,1/8W Resistor, 400?, 1%, 1/8W Switch, SPDT 400x300mil 700x500mil TO-263AB SOT23 TO-252AA 0603 0603 0603 0603 0603 0805 0603 0805 0805 2512 2512 0805 0805 SMT 100mil Centers PACKAGE SMT Radial 0603 0805 Radial 0603 1206 Radial Radial 1206 SOT23 100mil Centers Various Berg Berg Berg Berg Berg Johnson Components Johnson Components Burndy Falco Falco Intersil Various Intersil Various Various Various Various Various Various Various Various Various Vishay Vishay Various Various C&K Components Jolo Keystone Tektronics 8-Lead SOIC 16-Lead SOIC 8-Lead SOIC Intersil Intersil Intersil VENDOR Lumex Panasonic Various Various Sanyo Various Various Sanyo

PART

SSL-LXA

EEUFC

16SPS

4SP5

BA

6800

7136

6800

7136

39-29

111-07

111-07

KPA8

TTIG08

TTIB15

HUF76

2N7

HUF76

WSL2512

WSL2512

GT11M

TP1, TP3, TP4, TP5, TP7, TP8 Small Test Point TP2, TP6, TP10 TP9, TP11 U1, U3 U2 U4 Large Test Point Probe Socket Synchronous Buck Driver IC Multiphase Buck Controller IC MOSFET Driver IC

SPCJ-

151

13143

HIP66

HIP63

HIP2

6

m/

Application Note AN9888 Layout Drawing - Components

7

m/

Application Note AN9888 Layout Drawing - Top Copper

8

m/

Application Note AN9888 Layout Drawing - Ground Plane

9

m/

Application Note AN9888 Layout Drawing - Power Plane

10

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分销商库存信息:
INTERSIL HIP6302EVAL1


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