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NX2415 fiches techniques PDF

NEXSEM - TWO PHASE SYNCHRONOUS PWM CONTROLLER

Numéro de référence NX2415
Description TWO PHASE SYNCHRONOUS PWM CONTROLLER
Fabricant NEXSEM 
Logo NEXSEM 





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NX2415 fiche technique
NEXSEM
Evaluation board available.
NX2415
TWO PHASE SYNCHRONOUS PWM CONTROLLER WITH
INTEGRATED FET DRIVER AND DIFFERENTIAL CURRENT SENSE
PRELIMINARY DATA SHEET
Pb Free Product
DESCRIPTION
FEATURES
The NX2415 is a two-phase PWM controller with inte- n Differential inductor DCR sensing eliminates the
grated FET driver designed for low voltage high current
application. The two phase synchronous buck converter
offers ripple cancelation for both input and output. The
NX2415 uses differential remote sensing using either
current sense resistor or inductor DCR sensing to achieve
accurate current matching between the two channels.
n
n
n
n
n
problem with layout parasitic
External programmable voltage droop
Low Impedance On-board Drivers
Hiccup current limit
Power Good for power sequencing
Enable Signal allows external shutdown as well as
Differential sensing eliminates the error caused by PCB
board trace resistance that is otherwise is present when
using a single ended voltage sensing. In addition the
NX2415 offers high drive current capability especially for
n
n
n
programming the BUS voltage start up threshold
Programmable frequency
Prebias start up
Over voltage protection without negative spike at
keeping the synchronous MOSFET off during SW node output
transition, accurate programmable droop allowing to re- n Pb-free and RoHS compliant
duce number of output capacitors, accurate enable cir-
APPLICATIONS
cuit provides programmable start up point for Bus volt- n Graphic card High Current Vcore Supply
age, PGOOD output, programmable switching frequencyn High Current +40A on board DC to DC converter
and hiccup current limiting circuitry.
applications
TYPICAL APPLICATION
+5V
10 31
VCC
1uF
10k 30
EN
+12V
6.49k
1.65k
29 ENBUS
+5V
op
45.3k
10k
7 DROOP
2 RT
28 PGOOD
VOUT
11 CSCOMP
430 220nF
1.8nF 3.92k
10k
2N3906
20k
2.2nF
10k
20k
5.62k
3 PGSEN
1nF
5 FB
6.8nF
6 VCOMP
150pF
PVCC1 23 1uF
+5V
1uH
BST1 24
HDRV1 25
SW1 26
2 x 10uF
180uF
0.22uF M1
2.15 0.68uH
LDRV1 22
M2 620
1uF
100uF
VIN1
+12V
VOUT
+1.2V/50A
2 x (1000uF,7mohm ESR)
PGND1 21
CS+1 9
CS-1 10
PVCC2 18
1uF
+5V
620
17
BST2
16
HDRV2
15
SW2
19
LDRV2
0.22uF
2.15
10uF
M3
0.68uH
M4 620
1uF
1k
180k
10nF
100k
4
8
VP
OCP
1 VREF
10nF
20
PGND2
CS+2 12
CS-2 13
1nF 14 IOUT AGND
32
620
Figure1 - Typical application of NX2415
ORDERING INFORMATION
Device
NX2415CMTR
Temperature
0 to 70oC
Package
MLPQ-32L
Frequency
200kHz to 1MHz
Pb-Free
Yes
Rev.4.8
05/06/08
www.nexsem.com
1
Free Datasheet http://www.Datasheet4U.com

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