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AN1482.0

June 30, 2009

OPTIONAL COMPONENTS OR RESISTOR JUMPERS

ITEM

QTY

REFERENCE

VALUE

DESCRIPTION

PART #

MANUFACTURER

R7, R12, R13, R14, R15, R16,
R17, R18, R19, R20, R21

RESISTOR Jumpers, SMD, 0603, 10%

Generic

CO12, CO22, CO32

DNP

CO23, CO34

DNP

Cp2, Cp3

DNP

P MOSFET TO-252

M6, M7, M8

DNP

N MOSFET

R4, R22, R25, R27

DNP

RESISTOR, SMD, 0603

R23, R24, R26

DNP

RESISTOR, SMD, 1206

EVALUATION BOARD HARDWARES

ITEM

QTY

REFERENCE

VALUE

DESCRIPTION

PART #

MANUFACTURER

J3, J4, J5

3 Head Jumper

68000-236HLF

Generic

TP1, TP2, TP3, TP4, TP6, TP17,
TP11, TP12, TP13, TP14, TP7

TEST POINT

5007

Keystone

TP8, TP10, TP16, TP19, TP21,
TP9, TP5, TP15, TP20

GND

TURRET

1514-2

Keystone

TABLE 2. BILL OF MATERIALS (Continued)

Application Note 1482

Содержание ISL9440CEVAL1Z

Страница 1: ...440C offers programmable soft start independent enable functions and integrates OV OC OT protection The current mode control architecture and internal compensation network keep peripheral component counts minimized 600kHz switching frequency can minimize inductor size while the strong gate driver is able to deliver 12A to each PWM channel Table 1 shows the difference in terms of ISL944xx family fe...

Страница 2: ...e variation should be within 3 5 Adjust load current within the specified range and observe output voltage The output voltage variation should be within 3 6 Use oscilloscope to observe output voltage ripple and Phase node ringing For accurate measurement refer to Figure 3 for proper test set up Electrical Specifications Recommended operation conditions unless otherwise noted Refer to schematic and...

Страница 3: ...e sensing resistors sets the current scale on the oscilloscope 5 Apply pulse square waveform across R27 R22 or R25 The duty cycle of the pulse waveform should be small 5 to limit thermal stress on current sensing resistor and the MOSFETs M8 M6 or M7 6 The amplitude of the clock sets the current step amplitude Adjust the clock amplitude and slew rate to set the current step and slew rate 7 Monitor ...

Страница 4: ...FFICIENCY vs LOAD VO 5 0V FIGURE 8 PWM1 OUTPUT RIPPLE UNDER MAX LOAD VIN 12V IO1 IO2 6A IO3 4A FULL BANDWIDTH EFFICIENCY LOAD CURRENT A 40 45 50 55 60 65 70 75 80 85 90 0 8 VIN 9VDC VIN 12VDC 1 2 3 4 5 6 7 VIN 16VDC EFFICIENCY 50 55 60 65 70 75 80 85 90 95 100 LOAD CURRENT A 0 8 1 2 3 4 5 6 7 VIN 16VDC VIN 12VDC VIN 9VDC LOAD CURRENT A EFFICIENCY 50 55 60 65 70 75 80 85 90 95 100 0 2 4 6 5 3 1 VIN...

Страница 5: ...ANSIENT RESPONSE LOAD STEP FROM 1 5A TO 4 5A FIGURE 13 PWM3 LOAD TRANSIENT RESPONSE LOAD STEP FROM 1A TO 3A FIGURE 14 SOFT START WAVEFORMS Typical Evaluation Board Performance Curves VIN 12V Unless Otherwise Noted Continued VOUT2 AC 50mV DIV 500ns DIV VOUT3 AC 50mV DIV 500ns DIV VOUT1 AC 50mV DIV ISTEP 2A DIV 50µs DIV VOUT2 AC 100mV DIV ISTEP 2A DIV 50µs DIV VOUT3 AC 100mV DIV ISTEP 1A DIV 50µs DI...

Страница 6: ..._N 8 G4 9 LDOFB 10 SGND 11 OCSET2 12 FB2 13 EN SS2 14 OCSET3 15 FB3 16 EN SS3 17 ISEN3 18 PHASE3 19 BOOT3 20 UGATE3 21 LGATE3 22 PGND 23 ISEN2 24 PHASE2 25 BOOT2 26 UGATE2 27 LGATE2 28 LGATE1 29 UGATE1 30 BOOT1 31 PHASE1 32 33 PAD TP19 GND 1 Css1 10n TP1 VIN 1 RL1 1 2 CL1 820p TP2 VIN 1 1V 6A LDOFB VO1 CIN3 10u 25V OPT Load Tran OPT Load Tran OPT Load Tran Cf f 3 100p 3 3V 5 0A 1 0A TP12 EN1 1 R14...

Страница 7: ...P Ceramic X5R 16V SMD 0603 Generic 16 1 C2 22pF CAP Ceramic SMD 0603 Generic 17 1 C3 1µF CAP Ceramic 6 3V SMD 0603 Generic 18 1 L1 1 0µH SHIELDED INDUCTOR 919AS 1R0N TOKO 19 1 L2 1 8µH SHIELDED INDUCTOR 919AS 1R8N TOKO 20 1 L3 2 8µH SHIELDED INDUCTOR 919AS 2R8M TOKO 21 3 M1 M2 M3 Dual N MOSFET 30V SOIC8 IRF7907 International Rectifier 22 1 M4 P MOSFET SOIC8 Si4423DY Vishay 23 1 RFIN1 10Ω RESISTOR ...

Страница 8: ...RT MANUFACTURER 39 10 R7 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 0 RESISTOR Jumpers SMD 0603 10 Generic 40 3 CO12 CO22 CO32 DNP 41 2 CO23 CO34 DNP 42 2 Cp2 Cp3 DNP 43 1 M5 DNP P MOSFET TO 252 44 3 M6 M7 M8 DNP N MOSFET 45 4 R4 R22 R25 R27 DNP RESISTOR SMD 0603 46 3 R23 R24 R26 DNP RESISTOR SMD 1206 EVALUATION BOARD HARDWARES ITEM QTY REFERENCE VALUE DESCRIPTION PART MANUFACTURER 47 3 J3 J4 J5 3 He...

Страница 9: ...9 AN1482 0 June 30 2009 ISL9440CEVAL1Z PCB Layout FIGURE 15 TOP COMPONENTS FIGURE 16 TOP LAYER Application Note 1482 ...

Страница 10: ...10 AN1482 0 June 30 2009 FIGURE 17 SECOND LAYER SOLID GROUND FIGURE 18 THIRD LAYER ISL9440CEVAL1Z PCB Layout Continued Application Note 1482 ...

Страница 11: ...11 AN1482 0 June 30 2009 FIGURE 19 BOTTOM LAYER MIRRORED FIGURE 20 BOTTOM COMPONENTS MIRRORED ISL9440CEVAL1Z PCB Layout Continued Application Note 1482 ...

Страница 12: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Intersil ISL9440CEVAL1Z ...

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