ADP3412JR 데이터 시트보기 (PDF) - Analog Devices

부품명

상세내역

일치하는 목록

ADP3412JR

Dual MOSFET Driver with Bootstrapping

Analog Devices 

ADP3412

where fMAX is the maximum switching frequency of the control-

ler. The peak surge current rating should be checked in-circuit,

since this is dependent on the source impedance of the 5 V sup-

ply and the ESR of CBST.

Delay Capacitor Selection

The delay capacitor, CDLY, is used to add an additional delay

when the low side FET drive turns off and when the high side

drive starts to turn on. The delay capacitor adds 1 ns/pF of

additional time to the 20 ns of fixed delay.

If a delay capacitor is required, look for a good quality ceramic

capacitor with an NPO or COG dielectric, or for a good quality

mica capacitor. Both types of capacitors are available in the 1 pF

to 100 pF range and have excellent temperature and leakage

characteristics.

Printed Circuit Board Layout Considerations

Use the following general guidelines when designing printed

circuit boards:

1. Trace out the high current paths and use short, wide traces

to make these connections.

2. Connect the PGND Pin of the ADP3412 as close as pos-

sible to the source of the lower MOSFET.

3. The VCC bypass capacitor should be located as close as

possible to VCC and PGND Pins.

Typical Application Circuits

The circuit in Figure 3 shows how two drivers can be com-

bined with the ADP3160 to form a total power conversion

solution for VCC(CORE) generation in a high current GOA com-

puter. Figure 4 gives a CPU a similar application circuit for a

35 A processor.

VIN

12V

VIN RTN

270␮F ؋ 4

OS-CON 16V

C12 C13 C14 C15

R6

10⍀

C4

4.7␮F

RA

60.4k⍀

FROM

CPU

COC

1.4nF

RZ

1.1k⍀

RB

10k⍀

U1

ADP3160

1 VID4

VCC 16

2 VID3

REF 15

3 VID2

CS– 14

4 VID1 PWM1 13

5 VID0 PWM2 12

6 COMP CS+ 11

7 FB PWRGND 10

8 CT

C1

150pF

GND 9

C2

100pF

R1

1k⍀

R7

20⍀

C21

15nF

R8

330⍀

C23

330pF

C22

1nF

R4

4m⍀

C26

4.7␮F

D1

MBR052LTI

C9

1␮F

R5

2.4k⍀

U2

Q5

ADP3412

2N3904

Z1

ZMM5236BCT

1 BST DRVH 8

2 IN

SW 7

3 DLY PGND 6

4 VCC DRVL 5

C5

1␮F

C7

15pF

Q1

FDB7030L L1

600nH

Q2

FDB8030L

D2

C10

MBR052LTI

1␮F

U3

ADP3412

1 BST DRVH 8

2 IN

SW 7

3 DLY PGND 6

4 VCC DRVL 5

C6

C8

1␮F

15pF

1200␮F ؋ 8

OS-CON 2.5V

11m⍀ ESR (EACH)

+ +++ ++++

VCC(CORE)

1.1V – 1.85V

53.4A

C11 C16 C17 C18 C19 C20 C21 C22

VCC(CORE)

RTN

Q3

FDB7030L

Q4

FDB8030L

L2

600nH

Figure 3. 53.4 A Intel CPU Supply Circuit

REV. A

–7–

Share Link: