Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

SP6121 Arkusz danych(PDF) 4 Page - Sipex Corporation

Numer części SP6121
Szczegółowy opis  Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  SIPEX [Sipex Corporation]
Strona internetowa  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP6121 Arkusz danych(HTML) 4 Page - Sipex Corporation

  SP6121 Datasheet HTML 1Page - Sipex Corporation SP6121 Datasheet HTML 2Page - Sipex Corporation SP6121 Datasheet HTML 3Page - Sipex Corporation SP6121 Datasheet HTML 4Page - Sipex Corporation SP6121 Datasheet HTML 5Page - Sipex Corporation SP6121 Datasheet HTML 6Page - Sipex Corporation SP6121 Datasheet HTML 7Page - Sipex Corporation SP6121 Datasheet HTML 8Page - Sipex Corporation SP6121 Datasheet HTML 9Page - Sipex Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 16 page
background image
Date: 5/25/04
SP6121 Low Voltage, Synchronous Step Down PWM Controller
© Copyright 2004 Sipex Corporation
4
FUNCTIONAL DIAGRAM
+
-
-
+
-
+
Synchronous
Driver
PWM
Logic
S
Q
R
Reset
Dominant
S
Q
R
ISET
VCC
ISENSE
Reference
5
4
3
6
1.25V
UVLO
FAULT
GND
2
7
NDRV
8
DRIVER ENABLE
RESET
Dominant
PWM COMP
FAULT
+
-
X 3.3
PDRV
PDRV
VCC
5µA
300mV
SHUTDOWN
GM
ERROR
AMP
Over Current
(Gated S&H)
2.79V ON
2.69V OFF
30µA
(3300 ppm/°C)
COMP
SHUTDOWN
F = 500kHz
750mV RAMP
0.4V/ms
SOFTSTART
VFB
COMP
1
-
+
-
+
1V
530mV
(3300 ppm/°C)
+
-
General Overview
The SP6121 is a constant frequency, voltage
mode, synchronous PWM controller designed
for low voltage, DC/DC step down converters.
It is intended to provide complete control for a
high power, high efficiency, precisely regulated
output voltage from a highly integrated 8-pin
solution.
The internal free-running oscillator accurately
sets the PWM frequency at 500kHz without
requiring any external elements and allows the
use of physically small, low value external com-
ponents without compromising performance. A
transconductance amplifier is used for the error
amplifier, which compares an attenuated sample
of the output voltage with a precision reference
voltage. The output of the error amplifier
(COMP), is compared to a 0.75V peak-to-peak
ramp waveform to provide PWM control. The
COMP pin provides access to the output of the
error amplifier and allows the use of external
components to stabilize the voltage loop.
High efficiency is obtained through the use of
synchronous rectification. Synchronous regula-
tors replace the catch diode in the standard buck
converter with a low RDS(ON) N-channel
MOSFET switch allowing for significant effi-
ciency improvements. The SP6121 includes two
fast MOSFET drivers with internal non-overlap
circuitry and drives a complementary pair of
power transistors, P-channel on the high side,
and N-channel on the low side. The use of a P-
channel high side device minimizes complexity
and external component count by eliminating
the need for a charge pump that would otherwise
be required to fully enhance an N-channel de-
vice. It also allows inherent 100% duty cycle for
low dropout operation in the event of a low input
supply voltage condition.
The SP6121 includes an internal 0.4V/ms soft-
start circuit that provides controlled ramp up of
the output voltage, preventing overshoot and
inrush current at power up.
Current limiting is implemented by monitoring
the voltage drop across the RDS(ON) of the high
side P-channel MOSFET while it is conducting,
thereby eliminating the need for an external
sense resistor. The over-current comparator has
a built-in threshold of 160mV that can be pro-
grammed to higher values using a single exter-
nal resistor, connected to the ISET pin, whose
THEORY OF OPERATION


Podobny numer części - SP6121

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Sipex Corporation
SP6121 SIPEX-SP6121 Datasheet
1Mb / 42P
   Low Voltage, Synchronous Step Down PWM Controller
SP6121CN-L SIPEX-SP6121CN-L Datasheet
1Mb / 42P
   Low Voltage, Synchronous Step Down PWM Controller
SP6121EB SIPEX-SP6121EB Datasheet
419Kb / 6P
   Demo Board Manual
More results

Podobny opis - SP6121

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Sipex Corporation
SP6128A SIPEX-SP6128A Datasheet
125Kb / 10P
   Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters
SP6123 SIPEX-SP6123 Datasheet
154Kb / 18P
   Low Voltage, Synchronous Step-Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters
SP6128A SIPEX-SP6128A_05 Datasheet
125Kb / 10P
   Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters
SP6120 SIPEX-SP6120 Datasheet
145Kb / 13P
   Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters
SP6120 SIPEX-SP6120 Datasheet
308Kb / 22P
   Low Voltage, AnyFETTM, Synchronous,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters
SP6120 SIPEX-SP6120_05 Datasheet
216Kb / 22P
   Low Voltage, AnyFETTM, Synchronous,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters
SP6120B SIPEX-SP6120B Datasheet
304Kb / 22P
   Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters
logo
Torex Semiconductor
XC9243B08CDR-G TOREX-XC9243B08CDR-G Datasheet
862Kb / 29P
   2A Synchronous Step-Down DC/DC Converters
XD9242 TOREX-XD9242 Datasheet
2Mb / 30P
   2A Synchronous Step-Down DC/DC Converters
logo
Sipex Corporation
SP6120HV SIPEX-SP6120HV Datasheet
416Kb / 22P
   High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com