IRDC3629A International Rectifier, IRDC3629A Datasheet

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IRDC3629A

Manufacturer Part Number
IRDC3629A
Description
BOARD EVAL SYNC BUCK CONTROLLER
Manufacturer
International Rectifier
Datasheets
DESCRIPTION
The IR3629A is a synchronous buck controller,
providing a compact, high performance and
flexible solution in a small 3mmx4mm MLPD
package.
Key features offered by the IR3629A include
programmable soft-start ramp, precision 0.6V
reference voltage, thermal protection, fixed
300kHz switching frequency requiring
external
lockout for proper start-up, and pre-bias start-
up.
BOARD FEATURES
V
V
IRF6712 as Controller MOSFET
IRF6715 as Synchronous MOSFET
L = 0.6uH
C
C
Optional external supply connection for Vc
Optional Power-good output connection
component,
in
out
in
out
=2x270uF (OS-CON cap) + 2x10uF (ceramic 1206)
= +12V (13.2V Max)
=2x330uF(SP cap)
= +1.8V @ 0-25A
USER GUIDE FOR IR3629A EVALUATION BOARD
input
under-voltage
(V
in
=12V, V
no
o
=1.8V, I
An output over-current protection function is
implemented by sensing the voltage developed
across the on-resistance of the synchronous
rectifier
performance.
This user guide contains the schematic and bill of
materials for the IR3629A evaluation board. The
guide describes operation and use of the
evaluation board itself. Detailed
information for the IR3629A integrated circuit is
available in the IR3629A data sheet.
o
=25A)
MOSFET
for
IRDC3629A
optimum
application
cost
and
1

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IRDC3629A Summary of contents

Page 1

... This user guide contains the schematic and bill of materials for the IR3629A evaluation board. The guide describes operation and use of the no evaluation board itself. Detailed under-voltage information for the IR3629A integrated circuit is available in the IR3629A data sheet. IRDC3629A =25A) o MOSFET for optimum cost and ...

Page 2

... Table I. Connections Signal Name V (+12V) in Ground Optional Vcc input Ground for optional Vcc input Ground of V out V (+1.8V) out Bias Voltage Ground IRDC3629A A maximum of 20A load can be 2 ...

Page 3

... V = 12V in Fig. 1 Connection diagram of the evaluation board for IR3629A (Top view) Fig. 2 Bottom view of the evaluation board for IR3629A IR3629A Demo Board IRDC3629A V =1. ...

Page 4

... IR3629A PCB Layers Top Layer Bottom Layer IRDC3629A 4 ...

Page 5

... IR3629A PCB Layers PGND Mid-layer1 Mid-layer2 IRDC3629A AGND Single point connection between PGND and AGND 5 ...

Page 6

... IR3629A PCB Layers Mid-layer3 Mid-layer4 IRDC3629A 6 ...

Page 7

... PGood N3065372 IRF6715 MX Vsens LDrv 9 4 Comp PGND Thermal R12 3.65K C9 N 3.57K 0.56nF 31.6k R3 15. IRDC3629A 0.1uF 10uF 10uF 10uF C12 0.1uF SW L1 N3065200 1 2 0.6uH C21 C20 C16 C17 C18 330uF 330uF No Stuff No Stuff No Stuff R* 0 Vin Vin+ 1 Vin+ ...

Page 8

... Thick film, 1%, 1/10W Thick film, 1%, 1/10W Thick film, 1%, 1/10W Thick film, 1%, 1/10W Thick film, 1%, 1/10W Thick film, 1%, 1/10W Thick film, 1%, 1/10W Thick film, 1%, 1/10W Thick film, 1%, 1/10W Thick film, 1%, 1/4W IRDC3629A Size Manufacturer Part Number - Sanyo 16SVPC270M 1206 Murata GRM31CR61C106KA88 603 ...

Page 9

... Value Description MLPD PWM Controller Banana Jack, Insulated, Solder Terminal, Black - Banana Jack, Insulated, Solder Terminal, Red - Banana Jack, Insulated, Solder Terminal, Green - IRDC3629A Size Manufacturer Part Number 3x4 IR IR3629AMPbF 603 1206 603 Johnson Components 105-0853-001 Johnson Components 105-0852-001 Johnson Components ...

Page 10

... Fig. 4 Start Up at 25A Ch1:PGood, Ch2:Vss, Ch3:Vin, Ch4:Vout Fig. 6 Output Voltage Ripple at 25A Load Ch1:Vout, Ch3:SW Fig. 8 Transient Response Ch1:Vout, Ch4:Io(0-12.5A) IRDC3629A Fig. 5 Prebias Start Up Ch1:Vin, Ch2:Vout, Ch3:Vss Fig. 7 Gate Signals at 25A Load Ch1:SW, Ch2:HDRV, Ch3:LDRV Fig. 9 Shorted Hiccup Condition Recovery ...

Page 11

... TYPICAL OPERATING PERFORMANCE Vin=12.0V, Vo=1.8V, Io=0-25A, Fs=300kHz, Air Flow=200LFM Fig. 10 Bode Plot of Control Loop IRDC3629A 11 ...

Page 12

... TYPICAL OPERATING PERFORMANCE Vin=12.0V, Vo=1.8V, Fs=300kHz, Room Temp, No Air Flow 100 0.0 Fig. 12 Thermal Image of IR3629A Demo Board at Io=20A IR3629A Efficiency 2.5 5.0 7.5 10.0 12.5 Iout(A) Fig. 11 Efficiency vs. Load 2 1 (1: IR3629A, 2: IRF6715, 3: IRF6712) IRDC3629A 15.0 17.5 20.0 12 ...

Page 13

... Copper (≥ 0.1mm for 1 oz. Copper and ≥ 0.23mm for 3 oz. Copper).  Two 0.30mm diameter via should be placed in the center of the pad land and connected to ground to minimize the noise effect on the IC. IRDC3629A 13 13 ...

Page 14

... IRDC3629A 14 14 ...

Page 15

... 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. IRDC3629A 15 15 ...

Page 16

... PITCH Figure A 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 IRDC3629A VGED-4 INCHES MAX MIN NOM MAX 1.00 .032 .035 .039 0.05 ...

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