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PDF IL34262 Data sheet ( Hoja de datos )
| Número de pieza | IL34262 | |
| Descripción | Power Factor Controller | |
| Fabricantes | IK Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de IL34262 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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et4U.comPower Factor Controllers
taSheThe are active power factor controllers specifically
adesigned for use as a preconverter in electronic ballast and in
.Doff-line power converter applications.
w These integrated circuits feature an internal startup timer
ww for stand-alone applications, a one quadrant multiplier for near
TECHNICAL DATA
IL34262
unity power factor, zero current detector to ensure critical
conduction operation, transconductance error amplifier, quick
mstart circuit for enhanced startup, trimmed internal bandgap
reference, current sensing comparator, and a totem pole output
oideally suited for driving a power MOSFET.
.cAlso included are protective features consisting of an
overvoltage comparator to eliminate runaway output voltage
Udue to load removal, input undervoltage lockout with
hysteresis, cycle-by-cycle current limiting, multiplier output
t4clamp that limits maximum peak switch current, an RS latch
efor single pulse metering, and a drive output high state clamp
for MOSFET gate protection. These devices are available in
edual-in-line and surface mount plastic packages.
taSh• Overvoltage Comparator Eliminates Runaway
Output Voltage
a• Internal Startup Timer
.D• One Quadrant Multiplier
• Zero Current Detector
w• Trimmed 2% Internal Bandgap Reference
• Totem Pole Output with High State Clamp
ww• Undervoltage Lockout with 6.0 V of Hysteresis
ORDERING INFORMATION
IL34262N Plastic
IL34262D SOIC
TA = 0° to 85° C for all packages.
PIN CONNECTIONS
• Low Startup and Operating Current
• Supersedes Functionality of SG3561, TDA4817
and MC34262
www.DataSheet4U.com
1 page  
IL34262
<Design Equations>
APPLICATION INFORMATION
The application circuits shown in Figures 19, 20 and 21
reveal that few external components are required for a
complete power factor preconverter. Each circuit is a
peak detecting current-mode boost converter that
operates in critical conduction mode with a fixed on-time
and variable off-time. A major benefit of critical
conduction operation is that the current loop is inherently
stable, thus elimination the need for ramp compensation.
The application in Figure 19 operates over an input
voltage range if 90 Vac to 138 Vac and provides an
output power of 80W (230V at 350mA) with an
associated power factor of approximately 0.998 at
nominal line. Figures 20 and 21 are universal input
preconverter examples that operate over a continuous
input voltage range of 90 Vac to 268Vac. Figure 20
provides an output power of 175W (400V at 440mA)
while Figure 21 provides 450W (400V at 1.125A). Both
circuits have an observed worst-case power factor of
approximately 0.989. The input current and voltage
waveforms of Figure 20 are shown in Figure 22 with
operation at 115 Vac and 230 Vac. The data for each of
the applications was generated with the test set-up
shown in Figure 24.
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet IL34262.PDF ] | |
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