MY9941 encapsulado SOP

MY9941 encapsulado SOP

CI-MY9941-SOP

Nuevo

Driver led cuatro canales modo corriente constante, 350 mA por canal, con control por DMX 512, amplificador diferencial entrada y decodificador DMX integrado, encapsulado SOP

Más detalles

3,81 € sin IVA

4,61 € IVA incl.

Peso: 0.01 kg
Entrega: 2 semanas

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Más informacion

Descargar datasheet: MY9941

Description

The MY9941, 4 channels constant current LED driver with
14bits grayscale APDM (Adaptive Pulse Density Modulation)
control, supports standard/4x DMX512 protocol and fully
differential interface suited for long distance cascade
applications. The distinctive DMX512 decoding approach
could decode precisely a standard DMX512 signal. And each
device loads one/two/three/four grayscale data according to
two slot selection pins. The differential interface provides
wide common-mode range to support long distance
transmission without common-ground power systems.
The device o p e r a t e s o v e r 5 V t o 4 0 V i n p u t v o l t a g e
r a n g e a n d provides 4 open-drain constant current sinking
outputs that are rated to 5 0 V and delivers up to 350mA
of high accuracy current to each string of LED. The current at
each output is programmable by means of four external
current setting resistors. The MY9941 provides the gamma
correction, gamma value is 2.2, to transform 8bits DMX data
to 14bits APDM data in order to enhance brightness contract.
The 14bits adaptive pulse density modulation makes sure
that the frame refresh rate is higher than 2KHz. And an
accurate oscillator is built in for free running APDM grayscale
control and DMX512 decoder.
Furthermore, MY9941 also supports 4X DMX512 interface to
enhance data refresh rate by four times. MY9941 could drive
High Power LED directly by shorting the output channels and
changing the slot data number. The POL function makes
MY9941 as a PWM generator to support driving high power
LEDs. MY9941 is available in SSOP24/TSSOP20 packages
and specified over the -40°C to +85°C ambient temperature
range.

Features

✦ White / CW.WW / R.G.B / R.G.B.W applications
✦ One / Two / Three / Four slots data selection for different
LED configuration applications
✦ 5V to 40V Operating supply voltage
✦ 350mA Maximum constant current output (Per channel)
✦ Current setting by 4 external resistors
✦ 50V Rated output channels for long LED strings
✦ ±1.5% (typ.) LED Current accuracy between channels
✦ ±3% (typ.) LED Current accuracy between chips
✦ Auto-addressing cascade architecture
✦ Standard DMX512 protocol decoder (USITT DMX512-A)
✦ 4X DMX512 protocol selection (Baud rate=1MHz)
✦ Distinctive differential output corresponding with
DMX512 format for long distance cascade
✦ Wide common-mode range for differential input signals
✦ Non-polarity connection for differential data input
✦ 14bits grayscale resolution with Adaptive Pulse Density
Modulation
✦ Gamma, 2.2, to transform 8bits DMX to 14bits APDM data
✦ Frame refresh rate > 2000Hz as a LED driver
Frame refresh rate > 120Hz as a PWM generator
✦ Traditional non-scramble constant current waveform for
high power LED applications (PWM generator only)
✦ Built-in oscillator for grayscale control and DMX512
decoder
✦ -40°C to +85°C Ambient temperature range


Applications

❑ Standard DMX512 protocol system
❑ Full Color Mesh Display
❑ Architectural and Decorative Lighting

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MY9941 encapsulado SOP

MY9941 encapsulado SOP

Driver led cuatro canales modo corriente constante, 350 mA por canal, con control por DMX 512, amplificador diferencial entrada y decodificador DMX integrado, encapsulado SOP

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