Microchip MIC4811YMM Manual

Microchip Ikke kategoriseret MIC4811YMM

Læs gratis den danske manual til Microchip MIC4811YMM (4 sider) i kategorien Ikke kategoriseret. Denne vejledning er vurderet som hjælpsom af 20 personer og har en gennemsnitlig bedømmelse på 4.3 stjerner ud af 10.5 anmeldelser. Har du et spørgsmål om Microchip MIC4811YMM, eller vil du spørge andre brugere om produktet?

Download PDF
Side 1/4
MIC4811 Evaluation Board
High Current 6 Channel Linear WLED
Driver with DAM™ and Ultra Fast
PWM™ Control
Ultra Fast PWM and DAM™ Dynamic Average Matching are trademarks of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
General Description
The MIC4811 is a high efficiency linear White LED
(WLED) driver; it is designed to drive up to six high current
WLEDs while maintaining constant current in each
channel. The MIC4811 features Dynamic Average
Matching™ (DAM™) which is specifically designed to
provide optimum matching across all WLEDs. These high
accuracy (±1% typical) current regulated WLED channels
ensure uniform display illumination under all conditions. A
typical dropout of 100mV at 50mA is expected.
The MIC4811 is available in a 10-pin MSOP package with
a junction temperature range of -40°C to +125°C.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com
Requirements
The MIC4811 evaluation board requires a power supply
that is capable of delivering at least 1A while providing an
input voltage between 3.0V and 5.5V.
Precautions
The MIC4811 evaluation board is designed for an input
voltage no greater than 6V. This evaluation board does not
have reverse polarity protection; hence, applying a
negative voltage to the VIN terminal may damage the
device.
Getting Started
1. Connect an external supply to VIN. Apply the
desired input voltage across VIN and ground
terminals, J1 and J2, respectively, paying careful
attention to polarity and supply voltage
(3.0V≤VIN≤5.5V). An ammeter may be placed
between the input supply and the VIN terminal to
the evaluation board. Ensure that the supply
voltage is monitored at the VIN terminal. The
ammeter and/or power lead resistance can reduce
the voltage supplied to the input.
2. Enable/Disable the MIC4811
To enable the device, apply a DC voltage of 1.2V or
greater to the EN pin (J3). This allows for full
brightness of the WLEDs (100% duty cycle). The EN
pin can also be used for dimming by connecting a
PWM signal and varying its duty cycle (please refer to
the Ultra Fast PWM™ Dimming Interface Section in
datasheet). Pulling EN low for more than 20ms forces
the MIC4811 into a low IQ sleep mode. Do not leave
the EN pin floating as this may cause an indeterminate
output state. A pull down resistor of 200kΩ is placed from
EN to GND to ensure that the WLEDs are OFF when an
enable signal is not applied.
3. Setting LED current with RSET resistor.
The average LED current may be calculated using the
equation below:
( )
139.0)(
820
)(
139.0
)(
820
)(
−Ω
⋅
=
+
⋅
=Ω
kR
D
mAI
mAI
D
kR
SET
LED
LED
SET
D is the duty cycle of the LED current during PWM
dimming; D=1 when device is fully ON. The stock
evaluation board uses an RSET value of 16.5kΩ which
corresponds to ILED of 50mA.
4. Measuring WLED current.
To measure WLED current, simply insert an ammeter
in series with the WLED(s). Keep in mind that a series
ammeter will add a small voltage drop, so the voltage
at the WLED terminal(s), D1-D6, should be used when
making dropout measurements with a series ammeter.
Ordering Information
Part Number Description
MIC4811YMM EV Evaluation board with Six Channel
WLED Driver
March 2011 M9999-032111-B

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MIC4811YMM

Har du brug for hjælp?

Hvis du har brug for hjælp til Microchip MIC4811YMM stil et spørgsmål nedenfor, og andre brugere vil svare dig


Ikke kategoriseret Microchip Manualer

Microchip

Microchip PIC16F87 Manual

25 Oktober 2025
Microchip

Microchip PIC18F2620 Manual

25 Oktober 2025
Microchip

Microchip RN240 Manual

24 Oktober 2025
Microchip

Microchip PIC24HJ12GP201 Manual

24 Oktober 2025
Microchip

Microchip TC4420 Manual

24 Oktober 2025
Microchip

Microchip HV2818 Manual

23 Oktober 2025
Microchip

Microchip MIC2298 Manual

23 Oktober 2025
Microchip

Microchip PIC16F630 Manual

23 Oktober 2025
Microchip

Microchip PIC32MZ2048EFG144 Manual

21 Oktober 2025
Microchip

Microchip PIC18F46J50 Manual

21 Oktober 2025

Ikke kategoriseret Manualer

Nyeste Ikke kategoriseret Manualer

Golden Lighting

Golden Lighting Glenn 3699-A1W Manual

31 Oktober 2025
Iogear

Iogear GCS1412TAA4C Manual

31 Oktober 2025
RaySafe

RaySafe Pro Stand Manual

31 Oktober 2025
Be Cool

Be Cool BCRDTI2026 Manual

31 Oktober 2025
Adventys

Adventys KTWI Manual

31 Oktober 2025
OmniMount

OmniMount SCTVPK Manual

31 Oktober 2025
Golden Lighting

Golden Lighting Skye 2090-WSC Manual

31 Oktober 2025
Golden Lighting

Golden Lighting Lautner 6082-OWM Manual

31 Oktober 2025
Simrad

Simrad RF70N Manual

31 Oktober 2025
Darkglass

Darkglass Tone Capsule Manual

31 Oktober 2025