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PDF Si9114ADJ Data sheet ( Hoja de datos )
| Número de pieza | Si9114ADJ | |
| Descripción | High-Frequency Switchmode Controller | |
| Fabricantes | Vishay Siliconix | |
| Logotipo |  |
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Si9114A
Vishay Siliconix
High-Frequency Switchmode Controller
FEATURES
D 15- to 200-V Input Range
D Current-Mode Control
D Internal Start-Up Circuit
D Latched SHUTDOWN
D Soft-Start
D 1.8-MHz Error Amp
DESCRIPTION
The Si9114A is a BiC/DMOS current-mode pulse width
modulation (PWM) controller IC for high-frequency dc/dc
converters. Single-ended topologies (forward and flyback) can
be implemented at frequencies up to 1 MHz. The oscillator has
an internal divide-by-two that limits the duty ratio to 50%. An
oscillator sync output allows converters to be synchronized in
phase as well as in frequency, in a master/slave configuration.
The output inverter can typically source 500 mA and sink
700 mA. Shoot-through current is all but eliminated to minimize
supply current requirements.
The high-voltage DMOS transistor allows the IC to interface
directly to bus voltages up to 200 V. Other features include a
1.5% accurate voltage reference, 1.8-MHz (min) bandwidth
error amplifier, shutdown logic control, soft-start and
undervoltage lockout circuits.
The Si9114A is available in both standard and lead (Pb)-free
14-pin plastic DIP and SOIC packages, and is specified over
the industrial, D suffix (−40_C to 85_C) temperature range.
FUNCTIONAL BLOCK DIAGRAM
4
NI
VREF
3
7
SS
CURRENT
FB COMPENSATION SENSE
5 6 13
Error
Amplifier
−
+
2V
Ref
Gen
+−
−
+
4.6 V
20 mA
+
−
1.25 V
−VIN
VCC 14
1
+VIN
−
−
+
0.2 V
+ 9.2 V
SYNC
10
ROSC COSC
89
OSC
B 2 Out
OSC
Enable
R
Q
S
Substrate
VCC
20 mA
S
Q
R
−
+
Undervoltage
Lockout
12 DRIVER
OUTPUT
11 −VIN
2
SHUTDOWN
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
www.vishay.com
1
1 page  
Si9114A
Vishay Siliconix
TIMING WAVEFORMS
Current
Sense
1.5 V−
0
50%
Output
VCC
tr v 10 ns
td
90%
FIGURE 1.
0
VCC
SHUTDOWN
VCC−
Output
50%
tf v 10 ns
tSD
90%
FIGURE 2.
0
PIN CONFIGURATIONS AND ORDERING INFORMATION
Dual-In-Line and SOIC
+VIN
SHUTDOWN
VREF
NI
FB
COMPENSATION
SS
1
2
3
4
5
6
7
14 VCC
13 CURRENT SENSE
12 DRIVER OUTPUT
11 −VIN
10 SYNC
9 COSC
8 ROSC
Top View
APPLICATIONS
ORDERING INFORMATION
Part Number Temperature Range
Package
Si9114ADY
Si9114ADY-T1
Si9114ADY-T1—E3
Si9114ADJ
Si9114ADJ—E3
−40 to 85_C
SOIC-14
PDIP-14
VO
+VIN
SD
VCC
SENSE
VREF
NI
FB
OUT
−VIN
SYNC
COMP COSC
SS ROSC
Si9420DY
TL431
−48 V (−42 to −56 V)
Si9114A
FIGURE 3. 15-W Forward Converter Schematic
Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and
Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see
http://www.vishay.com/ppg?70025.
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
www.vishay.com
5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet Si9114ADJ.PDF ] | |
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