|
|
PDF SP6120HV Data sheet ( Hoja de datos )
| Número de pieza | SP6120HV | |
| Descripción | High Voltage / Synchronous /Buck Controller Ideal for 2A to 20A / High Performance / DC-DC Power Converters | |
| Fabricantes | Sipex | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de SP6120HV (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
|
No Preview Available !
® SP6120HV
High Voltage, Synchronous ,Buck Controller
Ideal for 2A to 20A, High Performance, DC-DC Power Converters
■ Optimized for Single Supply, 3V - 12V Applications
■ High Efficiency: Greater Than 95% Possible
■ "AnyFETTM" Technology: Capable Of Switching Either
PFET Or NFET High Side Switch
■ Selectable Discontinuous or Continuous Conduction
Mode
■ Fast Transient Response from Window Comparator
■ 16-Pin TSSOP, Small Size
■ Accurate 1% Reference Over Line, Load and Temperature
N/C 1
ENABLE 2
ISP 3
ISN 4
VFB 5
COMP 6
SS 7
ROSC 8
SP6120HV
16 Pin TSSOP
16 BST
15 GH
14 SWN
13 GND
12 PGND
11 GL
10 VCC
9 PROG
■ Accurate 10% Frequency
Now Available in Lead Free Packaging
■ Accurate, Rail to Rail, 43mV, Over-Current Sensing
■ Resistor Programmable Frequency
■ Resistor Programmable Output Voltage
■ Low Quiescent Current: 950µA, 10µA in Shutdown
■ Hiccup Over-Current Protection
■ Capacitor Programmable Soft Start
■ Guaranteed Boost Voltage to Enhance High Side NFET
APPLICATIONS
■ DSP
■ Microprocessor Core
■ I/O & Logic
■ Industrial Control
■ Distributed Power
■ Low Voltage Power
DESCRIPTION
The SP6120HV is a fixed frequency, voltage mode, synchronous PWM controller designed
to work from a single 12V, 5V or 3.3V input supply. Sipex's unique "AnyFETTM" Technology
allows the SP6120HV to be used for resolving a multitude of price/performance trade-offs.
It is separated from the PWM controller market by being the first controller to offer precision,
speed, flexibility, protection and efficiency over a wide range of operating conditions.
ENABLE
RZ
15k
CP
100pF
CZ
4.7nF
CSS
0.33µF
NMOS High Side Drive
PROG = GND
NC ® BST
ENABLE
GH
ISP SWN
SP6120B
ISN GND
VFB
COMP
PGND
GL
SS
ROSC
VCC
PROG
ROSC
18.7k
MBR0530
CBST
1µF
QT
QB
VIN
CVCC
2.2µF
3.3V
VIN
CB CIN
1µF 330µF x 2
RS
22.1k
L1
2.5µH
CS
39nF
DS
RF
5.23k
RI
10k
1.9V
1A to 8A
VOUT
COUT
470µF x 3
PMOS High Side Drive
PROG = VCC
ENABLE
NC
ENABLE
® BST
GH
ISP SWN
SP6120B
ISN GND
VFB
COMP
PGND
GL
CP
100pF
RZ
15k
CZ
4.7nF
SS
CSS
0.33µF
ROSC
ROSC
18.7k
VCC
PROG
3.3V
VIN
CIN
330µF x 2
QT1
RS
22.1k
L1
2.5µH
CS
39nF 1.9V
1A to 8A
VOUT
QB
VIN
DS
RF
5.23k
COUT
470µF x 3
CVCC
2.2µF
RI
10k
QT, QB = FAIRCHILD FDS6690A
QT1 = FAIRCHILD FDS6375 (PMOS only)
L1 = PANASONIC ETQP6F2R5SFA
DS = STMICROELECTRONICS STPS2L25U
CIN = SANYO 6TPB330M
COUT = SANYO 4TPB470M
Date: 5/25/04
SP6120HV Low Voltage, Synchronous Buck Controller
© Copyright 2004 Sipex Corporation
1
1 page  
BLOCK DIAGRAM
SS +
2V -
ENABLE 2
Reference 1.25V
VFB 3% Low ENABLE
VFB -
+3%- +
3%
-+ -
GND 13
VFB 5
SS
VFB
GM
Error Amplifier
+
-
+
-
+
COMP 6
Window
Comparator
Logic
ON 100%
OFF 100%
Continuous/
Discontinuous
Program
NFET/PFET Logic
9 PROG
RESET
Dominant
PWM Latch
R
Q QPWM
S
Driver
Logic
16 BST
Synchronous
Driver
15 GH
14 SWN
11 GL
12 PGND
VCC 10
2.85 VON
2.75 VOFF
UVLO
-
+
ISP 3
ISN 4
+
x 10
-
430mV
OVC
+
10µs
-
-
+
1V RAMP
F (kHz) = 5.7E6/ROSC (Ω)
Set Dominant
Fault Latch
S
Q FAULT
R
-
Zero crossing detect
+
250mV
7
SS
ICHARGE
0.65V
Soft Start
& Hiccup Logic
TOFF
8 ROSC
APPLICATION SCHEMATIC
ENABLE
RZ
15k
CP
100pF
CZ
4.7nF
CSS
0.33µF
NMOS High Side Drive
PROG = GND
NC ® BST
ENABLE
GH
ISP SWN
SP6120B
ISN GND
VFB
COMP
PGND
GL
SS
ROSC
VCC
PROG
ROSC
18.7k
MBR0530
CBST
1µF
QT
QB
VIN
CVCC
2.2µF
3.3V
VIN
CB CIN
1µF 330µF x 2
RS
22.1k
L1
2.5µH
CS
39nF
DS
RF
5.23k
RI
10k
1.9V
1A to 8A
VOUT
COUT
470µF x 3
Figure 1. Schematic 3.3V to 1.9V Power Supply
QT, QB = FAIRCHILD FDS6690A
L1 = PANASONIC ETQP6F2R5SFA
DS = STMICROELECTRONICS STPS2L25U
CIN = SANYO 6TPB330M
COUT = SANYO 4TPB470M
Date: 5/25/04
SP6120HV Low Voltage, Synchronous Buck Controller
5
© Copyright 2004 Sipex Corporation
5 Page 
Over Current Protection: continued
providing continuous current sensing and flex-
ible MOSFET selection. An internal, 10µs filter
conditions the over current signal from tran-
sients generated during load steps. In addition,
because the over current inputs, ISP and ISN, are
capable of rail to rail operation, the SP6120HV
provides excellent over current protection dur-
ing conditions where VIN approaches VOUT.
Zero Crossing Detection
In some applications, it may be undesirable to
have negative conduction current in the induc-
tor. This situation happens when the ripple cur-
rent in the inductor is higher than the load cur-
rent. Therefore, the SP6120HV provides an
option for “discontinuous” operation. If the
Program Logic (see next section) is set for dis-
continuous mode, then the Driver Logic looks at
the Zero Crossing Comparator and the state of
the lower gate driver. If the low side MOSFET
was “on” and V(ISP)-V(ISN) < 0 then the low
side MOSFET is immediately turned off and
held off until the high side MOSFET is turned
“on”. When the high side MOSFET turns “on”
, the Driver Logic is reset. The following figures
show continuous and discontinuous operation
for a converter with an NFET high side MOSFET.
Discontinuous vs. Continuous Mode
The discontinuous mode is used when better
light load efficiency is desired, for example in
portable applications. Additionally, for power
supply sequencing in some applications the DC-
DC converter output is pre-charged to a voltage
through a switch at start-up, and discontinuous
operation would be required to prevent reverse
inductor current from discharging the pre-charge
voltage. The continuous mode is preferable for
lower noise and EMI applications since the
discontinuous mode can cause ringing of the
switch node voltage when it turns both switches
off. Another example where continuous mode
could be required is one where the inductor has
an extra winding used for an over-winding regu-
lator and thus continuous conduction is neces-
sary to produce this second output voltage.
Continuous
Load
Current
0A
GH, GL
Voltage
0V
0V
Discontinuous
Load
Current
0A
GH, GL
Voltage
0V
0V
TIME
Program Logic
The Program pin (PROG) of the SP6120HV
adds a new level of flexibility to the design of
DC/DC converters. A 10µA current flows either
into or out of the Program pin depending on the
initial potential presented to the pin. If no resistor
is present, the Program Logic simply looks at the
potential on the pin, sets the mode to “continu-
ous” and programs NFET or PFET high side
drive accordingly. If the 68kΩ resistor is present,
the voltage drop across the resistor signals the
SP6120HV to put the Driver Logic in “discon-
tinuous” mode. With one pin and a 68kΩ resis-
tor, the SP6120HV can be configured for a
variety of operating modes:
Date: 5/25/04
SP6120HV Low Voltage, Synchronous Buck Controller
11
© Copyright 2004 Sipex Corporation
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet SP6120HV.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| SP6120HV | High Voltage / Synchronous /Buck Controller Ideal for 2A to 20A / High Performance / DC-DC Power Converters | Sipex |
| 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 |