|
|
PDF KA3511DS Data sheet ( Hoja de datos )
| Número de pieza | KA3511DS | |
| Descripción | Intelligent Voltage Mode PWM IC | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de KA3511DS (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
KA3511DS
Intelligent Voltage Mode PWM IC
www.fairchildsemi.com
Features
• Complete PWM control and house keeping circuitry
• Few external components
• Precision voltage reference trimmed to 2%
• Dual output for push-pull operation
• Each output TR for 200mA sink current
• Variable duty cycle by dead time control
• Soft start capability by using dead time control
• Double pulse suppression logic
• Over voltage protection for 3.3V / 5V / 12V
• Under voltage protection for 3.3V / 5V / 12V
• One more external input for various protection (PT)
• Remote on/off control function (PS-ON)
• Latch function controlled by remote and protection input
• Power good signal generator with hysteresis
Description
The KA3511DS is a fixed frequency improved performance
pulse width modulation control circuit with complete
housekeeping circuitry for use in the secondary side of
SMPS (Switched mode power supply). It contains various
functions, which are precision voltage reference, over
voltage protection, under voltage protection, remote on/off
control, power good signal generator and etc.
OVP (Over voltage protection) section
It has OVP functions for +3.3V,+5V,+12V and PT outputs.
The circuit is made up of a comparator with four detecting
inputs and without hysteresis voltage. Especially, PT (Pin18)
is prepared for an extra OVP input or another protection
signal.
UVP (Under voltage protection) section
Precision reference section
The reference voltage trimmed to ± 2%
(4.9V ≤ Vref ≤ 5.1V)
It also has UVP functions for +3.3V, +5V, +12V outputs. The
DataSheet4baUnlod.ccwkoiimtshmouatdheyuspteorefsaiscvoomltpaagrea.tor with three detecting inputs
PG (Power good signal generator) section
Power good signal generator is to monitor the voltage level
of power supply for safe operation of a microprocessor.
KA3511DS requires few external components to accomplish
a complete housekeeping circuits for SMPS.
Remote on/off section
Remote on/off section is used to control SMPS externally. If
a high signal is supplied to the remote on/off input, PWM
signal becomes a high state and all secondary outputs are
grounded. The remote on/off signal is transferred with some
on-delay and off-delay time of 8ms, 24ms respectively.
DataShee
24-SDIP
1
DataSheet4U.com
©2001 Fairchild Semiconductor Corporation
DataSheet4 U .com
Rev. 1.0.0
1 page  
www.DataSheet4U.com
et4U.com
Electrical Characteristics (Vcc=20V, Ta=25°C)
Parameter
Symbol
Condition
REFERENCE SECTION
Reference output voltage
Vref Iref=1mA
Line regulation
Load regulation
Temperature coefficient of Vref (1)
∆Vref.LINE
∆Vref.LOAD
∆Vref/∆T
10V ≤ VCC ≤ 30V
1mA ≤ Iref ≤ 10mA
-25°C ≤ Ta ≤ 85°C
Short-circuit output current
ISC Vref=0
OSCILLATOR SECTION
Oscillation frequency
fosc CT=0.01uF, RT=12k
Frequency change with
temperature (1)
fosc/T
CT=0.01uF, RT=12k
DEAD TIME CONTROL SECTION
Input bias current
IB(DT)
-
Maximum duty voltage
DCMAX Pin19 (DTC)=0V
Input threshold voltage
VTH(DT)
Zero Duty Cycle
Max. Duty Cycle
ERROR AMP SECTION
Inverting reference voltage
Vref(EA)
-
Input bias current
Open-loop voltage gain (1)
Unit-gain bandwidth (1)
IB(EA)
VCOMP=2.5V
GVO
0.5V≤VCOMP≤3.5V
BW DataSheet4U.c- om
Output sink current
ISINK
VCOMP=0.7V
Output source current
ISOURCE VCOMP=3.5V
PWM COMPARATOR SECTION
Input threshold voltage
VTH(PWM) Zero Duty Cycle
OUTPUT SECTION
Output saturation voltage
VCE(SAT) IC=200mA
Collector off-state current
IC(off)
VCC=VC=30V, VE=0V
Rising time
TR -
Falling time
TF -
Min.
4.9
-
-
-
15
-
-
-
45
-
0
1.20
-
70
-
0.3
-2.0
-
-
-
-
-
Typ.
5
2.0
1.0
0.01
35
10
2
-2.0
48
3.0
-
1.25
-0.1
95
650
0.9
-4.0
4
1.1
2
100
50
KA3511DS
Max. Unit
5.1 V
25 mV
15 mV
- %/°C
75 mA
- kHz
-%
-10 uA
50 %
3.3
V
-
1.30
-1.0
-
-
-
-
V
uA
dB
kHz
mA
mA
4.5 V
1.3 V
100 uA
200 ns
200 ns
DataShee
DataSheet4U.com
DataSheet4 U .com
5
5 Page 
www.DataSheet4U.com
Typical Characteristics (Continued)
5
4
3
2
1
00 1 2 3 4 5
Figure 15. Remote ON Open Voltage
KA3511DS
5
4
3
2
1
0
1.0 1.1 1.2 1.3 1.4 1.5
Pin 9 (DET) Voltage [V]
Figure 16. Detecting VCC Voltage (DET)
et4U.com
-0.000005
5
4 -0.000010
3
-0.000015
2
1 -0.000020
0
4.0 4.2 4.4 4.6 4.8
Pin 14 (5V) Voltage [V]
Figure 17. Detecting V5 Voltage
DataSheet4U.com
5.0 0 20 40 60 80 100 120 140 160
Figure 18. Charging Current for PG
DataShee
-0.032
-0.033
-0.034
-0.035
0
100 200 300 400
Figure 19. Short Circuit Current
5
4
3
2
1
0
0.0 0.5 1.0 1.5
2.0
Pin 10 (TPG) Voltage [V]
Figure 20. Hysteresis Voltage 2
2.5
DataSheet4U.com
DataSheet4 U .com
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet KA3511DS.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| KA3511D | Intelligent Voltage Mode PWM IC | Fairchild Semiconductor |
| KA3511DS | Intelligent Voltage Mode PWM IC | Fairchild Semiconductor |
| 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 |