|
|
PDF FP6329 Data sheet ( Hoja de datos )
| Número de pieza | FP6329 | |
| Descripción | Synchronous Buck PWM DC-DC Controller | |
| Fabricantes | Fiti | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de FP6329 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
fitipower integrated technology lnc. Preliminary
FP6329/A
Synchronous Buck PWM
DC-DC Controller
Description
The FP6329/A is designed to drive two N-channel
MOSFETs in a synchronous rectified buck topology.
It provides the output adjustment, internal soft-start,
frequency compensation networks, monitoring and
protection functions into a single package.
The FP6329/A operating at fixed 300/600kHz
frequency provides simple, single feedback loop,
voltage mode control with fast transient response.
The resulting PWM duty ratio ranges from 0-100%.
The FP6329/A features over current protection. The
output current is monitored by sensing the voltage
drop across the RDS-ON of the low side MOSFET
which eliminates the need for a current sensing
resistor.
This device is available in SOP-8 package.
Features
● Operates from +5V or +12V
● High Output Current
● Drives Two Low Cost N-Channel MOSFETs
● Fast Transient Response
● Simple Single-Loop Control Design
( Voltage-Mode PWM Control)
● Internal Soft-Start
● Over-Current Protection
● Over-Voltage Protection
● Under-Voltage Protection
● SOP-8 Package
● RoHS Compliant
Applications
● Motherboard
● Graphic Card
● Telecomm Equipments
● High Power DC-DC Regulators
● Switching Power Supply (SPS)
Pin Assignment
SO Package (SOP-8)
SP Package (SOP-8<Exposed Pad>)
Ordering Information
FP6329□□□□
TR: Tape / Reel
G: Green
Package Type
SO: SOP-8
SP: SOP-8(Exposed Pad)
Switching Frequency
Blank: 300kHz
A: 600kHz
Figure 1. Pin Assignment of FP6329/A
FP6329/A/B-Preliminary 0.2-2009
1
Free Datasheet http://www.Datasheet4U.com
1 page  
fitipower integrated technology lnc. Preliminary
FP6329/A
Electrical Characteristics
(VCC=12V, TA=25°C, unless otherwise specified)
Parameter
Symbol Conditions
INPUT
VCC Under Voltage Lockout
UVLO Hysteresis
Quiescent Current
ERROR AMPLIFIER
Feedback Voltage
FB Input Bias Current
Open Loop DC gain (Note2)
Open Loop Bandwidth (Note2)
Slew Rate (Note2)
VUVLO
ICC
VCC rising
VCC falling
UGATE and LGATE open
VFB
IFB VFB=1V
AO
BW
SR
OSCILLATOR
Frequency
Ramp Amplitude (Note2)
FOSC
△VOSC
FP6329
FP6329A
GATE DRIVERS
Upper Gate Source Current
(Note2)
Upper Gate Sink Impedance
Lower Gate Source Current
(Note2)
Lower Gate Sink Impedance
Dead Time (Note2)
IUGATE
RUGATE
ILGATE
RLGATE
TDT
VBOOT=12V,
VUGATE -VPHASE=2V
VBOOT=12V, IUGATE =0.1A
VVCC=12V, VLGATE =2V
VVCC =12V, ILGATE =0.1A
PROTECTION
FB Under-Voltage Trip
FB falling
FB Over-Voltage Trip
OCSET Current Source
IOCSET
Disable Threshold
VDISABLE
COMP/SD falling
Note2：The specification is guaranteed by design, not production tested.
Min Typ Max Unit
3.9 4.1
0.45
5
4.3
V
V
mA
0.591
0.6
0.1
88
15
9
0.609
V
µA
dB
MHz
V/μs
270 300
330
540 600 660 kHz
1.5 Vp-p
2.6
1.6
4.9
1.25
100
A
Ω
A
Ω
ns
40 50
125
19.5 21.5
0.3 0.4
60
23.5
0.5
%
%
µA
V
FP6329/A/B-Preliminary 0.2-2009
5
Free Datasheet http://www.Datasheet4U.com
5 Page 
fitipower integrated technology lnc. Preliminary
FP6329/A
Application Information
Introduction
The FP6329/A integrated circuit is a synchronous
PWM controller; it operates over a wide input
voltage range. Being low cost, it is a very popular
choice of PWM controller. This section will describe
the FP6329/A application suggestion. The operation
and the design of this application will also be
discussed in detail.
Design Procedures
This section will describe the steps to design
synchronous buck system, and explains how to
construct basic power conversion circuits including
the design of the control chip functions and the basic
loop.
(1) Synchronous Buck Converter
Since this is a buck output system, the first quantity
to be determined is the duty cycle value. The
formula calculated the PWM duty ratio; apply to the
system which we propose to design:
(2) Inductor Selection
To find the inductor value it is necessary to consider
the inductor ripple current. Choose an inductor
which operated in continuous mode down to 10
percent of the rated output load:
ΔIL = 2 x 10% x IO
The inductor “L” value for this system is connected
to be:
L≧
(VIN - VDS(sat) – VO) x DMIN
ΔIL x fS
If the core loss is a problem, increasing the
inductance of L will be helpful. But large inductor
values reduce the converter’s response time to a
load transient.
(3) Output Capacitor Selection
The output capacitor is required to filter the output
noise and provide regulator loop stability. When
selecting an output capacitor, the important
capacitor parameters are Equivalent Series
Resistance (ESR), the RMS ripples current rating,
the voltage rating, and capacitance value. For the
output capacitor, the ESR value is the most
important parameter.
FP6329/A/B-Preliminary 0.2-2009
The ESR can be calculated from the following
formula.
ESR
=
⎜⎛
⎝
VRIPPLE
ΔIL
⎟⎞
⎠
An aluminum electrolytic capacitor's ESR value is
related to the capacitance and its voltage rating. In
most case, higher voltage electrolytic capacitors
have lower ESR values. Most of the time, capacitors
with much higher voltage ratings may be needed to
provide the low ESR values required for low output
ripple voltage.
The capacitor voltage rating should be at least 1.5
times greater than the output voltage, and often
much higher voltage ratings are needed to satisfy
the low ESR requirements needed for low output
ripple voltage.
(4) Input Capacitor Selection
The RMS current rating of the input capacitor can
be calculated as below:
IIN((rms) = IOUT × D(1 D )
This capacitor should be located close to the IC
using short leads and the volt age rating should be
approximately 1.5 times the maximum input voltage.
(5) Output N-channel MOSFET Selection
The current ability of the output N-channel
MOSFETs must be at least more than the peak
switching current IPK. The voltage rating VDS of the
N-channel MOSFETs should be at least 1.25 times
the maximum input voltage. Choose the low RDS-ON
MOSFETs for reducing the conduction power loss.
Choose the low CISS MOSFETs for reducing the
switching loss. But most of time, the two factors are
trade-off. Consider the system requirement and
define the MOSFETs rating. The MOSFETs must be
fast (switch time) and must be located close to the
FP6329/A using short leads and short printed circuit
traces. In case of a large output current, we must
layout a copper to reduce the temperature of these
two MOSFETs.
11
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet FP6329.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| FP6321 | Sunchronous Buck PWM DC-DC Controller |  Fitipower |
| FP6321A | Sunchronous Buck PWM DC-DC Controller | Fiti |
| FP6326 | Synchronous Buck PWM | Fiti |
| FP6326A | Synchronous Buck PWM | Fiti |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |