Instrukcja obsługi Microchip HV9925DB1


Przeczytaj poniżej 📖 instrukcję obsługi w języku polskim dla Microchip HV9925DB1 (3 stron) w kategorii nieskategoryzowany. Ta instrukcja była pomocna dla 16 osób i została oceniona przez 8.5 użytkowników na średnio 4.4 gwiazdek

Strona 1/3
Supertex inc.
Supertex inc.
www.supertex.com
Doc.# DSDB-HV9925DB1
A032913
HV9925DB1
Introduction
The Supertex HV9925DB1 demo board is a complete LED
power driver to supply a string of LEDs using the HV9925,
an integrated, high-voltage, buck regulator IC featuring
programmable output current and PWM dimming. The
HV9925 includes a 500V switching MOSFET and can operate
directly from rectied AC line voltages of 80 to 135VAC.
The current in the LED string is externally programmed
to 50mA ±10% by a single resistor RS. The HV9925DB1
is ideally suited for driving strings of LEDs having forward
voltage from 20V to 60V at high efciency.
The HV9925DB1 is a peak current-controlled buck converter
operating with a xed off-time of 10.5µs. Its’ xed off-time
control scheme provides good stability and tight regulation of
the LED current throughout the input AC line voltage range.
As its switching frequency varies over the AC line cycle, the
HV9925 inherently introduces frequency dither and simplies
the compliance with EMI regulations.
Specications
Board Layout and Connection Diagram
Programmable-Current 120VAC
LED Driver Demoboard
with PWM Dimming
Parameter Value
Input voltage range 80 to 135VAC
Load current 50mA ± 10%
LED string voltage 20~60V
Conducted EMI CISPR15
Efciency 82% typ.
Actual Size: 40mm x 23mm x 16mm AC Line
80 - 135VAC
PWM
Dimming
Connections
LED+: Connect the Anode of the LED string to this pin.
LED-: Connect the Cathode of the LED string to this pin.
AC1, AC2: Connect AC Line to these pins.
Note:
The demoboard is not protected from output open/short
circuit condition. Damage to the demoboard may occur if
the output load is not properly connected


Specyfikacje produktu

Marka: Microchip
Kategoria: nieskategoryzowany
Model: HV9925DB1

Potrzebujesz pomocy?

Jeśli potrzebujesz pomocy z Microchip HV9925DB1, zadaj pytanie poniżej, a inni użytkownicy Ci odpowiedzą