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PDF APEC2007 Data sheet ( Hoja de datos )
| Número de pieza | APEC2007 | |
| Descripción | rgy-Efficient Peak-Current Controlled Power Conversion IC Family | |
| Fabricantes | Power Integrations | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de APEC2007 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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Energy-Efficient Peak-Current
Controlled Power Conversion IC Family
Delivers 3 to 28 Watts in Universal-Input
Flyback Power Supplies
By Kent Wong and John Jovalusky
APEC 2007
Anaheim, California
1 page  
Overview of How IC Interacts with Power Supply
• VOUT is compared to a reference (Zener Diode)
• When VOUT > ref set-point, Zener and opto-LED conduct, photo-
transistor pulls current from EN/UV pin, which disables switching
• As switching cycles are skipped, VOUT drops below ref set-point,
Zener and opto-LED stop conducting…, which enables switching
Controller continually
enables/disables
MOSFET switching to
keep VOUT in regulation
APEC 2007 Session T8: Semiconductor Devices
Slide# 5
5 Page 
IC Pin Function Descriptions
• DRAIN (D) Pin:
– Power MOSFET drain and high-voltage
current source (start up circuit) connections
• BYPASS / MULTI-FUNCTION (BP/M) Pin:
– Bias supply bypass capacitor connection point
– Internal ILIMIT level selection function
– Input for latching shutdown function
• ENABLE / UNDER-VOLTAGE (EN/UV) Pin:
– Feedback input to switching controller
– Input for under-voltage lockout function
• SOURCE (S) Pin:
– Power MOSFET source connections and
controller ground reference point
APEC 2007 Session T8: Semiconductor Devices
Slide# 11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet APEC2007.PDF ] | |
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