Microchip HV9925 Manual


Læs nedenfor 📖 manual på dansk for Microchip HV9925 (20 sider) i kategorien Ikke kategoriseret. Denne guide var nyttig for 3 personer og blev bedømt med 4.5 stjerner i gennemsnit af 2 brugere

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2019 Microchip Technology Inc. DS20005723A-page 1
HV9925
Features
Programmable Output Current up to 50 mA
Pulse-Width Modulation (PWM) Dimming/Enable
Universal 85 VAC to 264 VAC Operation
Fixed Off-Time Buck Converter
Internal 475V Power MOSFET
Overtemperature Protection with Hysteresis
Applications
Decorative Lighting
Low-Power Lighting Fixtures
General Description
The HV9925 is a pulse-width modulated high-efficiency
LED driver control IC with PWM dimming capabilities. It
allows efficient operation of high-brightness LED
strings from voltage sources ranging up to 400 VDC.
The HV9925 includes an internal high-voltage
switching MOSFET controlled with a fixed off-time of
approximately 10.5 µs. The LED string is driven at
constant current, thus providing constant light output
and enhanced reliability. Selecting a current sense
resistor value can externally program the output LED
current of the HV9925.
The peak current control scheme provides good
regulation of the output current throughout the
universal AC line voltage range of 85 VAC to 264 VAC
or DC input voltage of 20V to 400V. The HV9925 is
designed with a built-in thermal shutdown to prevent
excessive power dissipation in the IC.
Package Type
Heat slug (exposed thermal pad) is at ground potential. See Table 3-1 for pin information.
8-lead SOIC
(Top view)
1
2
3
4
8
7
6
5
RSENSE
GND
PWMD
VDD
DRAIN
DRAIN
DRAIN
NC
Heat Slug
EP
Programmable Current LED Lamp Driver IC with PWM Dimming


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: HV9925

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