Microchip MIC4801 Handleiding

Microchip Niet gecategoriseerd MIC4801

Lees hieronder de 📖 handleiding in het Nederlandse voor Microchip MIC4801 (12 pagina's) in de categorie Niet gecategoriseerd. Deze handleiding was nuttig voor 19 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld

Pagina 1/12
MIC4801
High Efficiency 600mA Single Channel
Linear WLED Driver with
Ultra Fast PWMâ„¢ Control
Ultra Fast PWM is a trademark 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
January 2011 M9999-011811-A
General Description
The MIC4801 is a high efficiency White LED (WLED)
driver designed to drive a single LED up to 600mA. The
MIC4801 constant current driver is designed to drive high
power LED’s in various lighting applications. The MIC4801
provides the highest possible efficiency as this architecture
has no switching losses present in traditional charge
pumps or inductive boost circuits. It features a typical
dropout of 130mV at 400mA. This allows the LEDs to be
driven directly from the voltage source eliminating
switching noise/losses present with the use of boost
circuitry. The high accuracy (±1% typical) current regulated
WLED channel ensures uniform display illumination under
all conditions. The brightness is controlled through an Ultra
Fast PWMâ„¢ Control interface operating down to less than
1% duty cycle.
The MIC4801 is available in an 8-pin SOIC 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.
Features
• High Efficiency (no Voltage Boost losses)
• Ultra Fast PWM™ control (200Hz to 500kHz)
• Input voltage range: 3.0V to 5.5V
• Dropout of 130mV at 400mA
• Programmable LED current with external resistor
• Current accuracy of ±1% typical
Applications
• Bill board displays
• Marquee displays
• Instrument displays
• Architectural lighting
____________________________________________________________________________________________________________
Typical Application
High Current Lighting Schematic
Micrel Inc. MIC4801
January 2011 2 M9999-011811-A
Ordering Information
Part Number Temperature Range Package
MIC4801YM –40°C to +125°C 8-Pin SOIC
Pin Configuration
8-Pin SOIC (M)
(Top View)
Pin Description
Pin Number Pin Name Pin Function
1 VIN Voltage Input. Connect at least 2.2µF ceramic capacitor between VIN and GND.
2 EN Enable LED drivers. This pin can be used as a PWM input for dimming of WLEDs. Do not leave
floating.
3 RSET An internal 1.27V reference sets the nominal maximum WLED current. Example, apply a 12.1kΩ
resistor between RSET and GND to set LED current to 416mA at 100% duty cycle.
4 GND Ground.
5 D1 LED1 driver input. Connect LED anode to VIN and cathode to this pin. All D1 pins must be
connected to the LED.
6 D1 LED1 driver input. Connect LED anode to VIN and cathode to this pin. All D1 pins must be
connected to the LED.
7 D1 LED1 driver input. Connect LED anode to VIN and cathode to this pin. All D1 pins must be
connected to the LED.
8 D1 LED1 driver input. Connect LED anode to VIN and cathode to this pin. All D1 pins must be
connected to the LED.
Micrel Inc. MIC4801
January 2011 3 M9999-011811-A
Absolute Maximum Ratings(1)
Main Input Voltage (VIN) .................................. –0.3V to +6V
Enable Input Voltage (VEN).............................. –0.3V to +6V
LED Driver Voltage (VD1) ................................ –0.3V to +6V
Power Dissipation .....................................Internally Limited
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (Ts) .........................–65°C to +150°C
Operating Ratings(2)
Supply Voltage (VIN)..................................... +3.0V to +5.5V
Enable Input Voltage (VEN) .................................... 0V to V
IN
LED Driver Voltage (VD1) ....................................... 0V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Junction Thermal Resistance
SOIC-8L (θJA)..................................................98.9°C/W
Electrical Characteristics
VIN = VEN = 5V, RSET = 12.1kΩ; VD1 = 1.2V; TJ = 25° °C, bold values indicate –40 C ≤ TJ ≤ 125°C; unless noted.
Parameter Conditions Min Typ Max Units
Current Accuracy(3) 374 416 458 mA
Drop-out Where ILED = 90% of LED current seen at
VDROPNOM = 1.2V, 100% brightness level 130 250 mV
Ground/Supply Bias Current IOUT = 416mA 2.2 2.9 mA
Shutdown Current VEN = 0V 0.01 1 µA
PWM Dimming
Logic Low 0.2 V Enable Input Voltage (V
EN)
Logic High 1.2 V
Enable Input Current VIH > 1.2V 0.01 1 µA
Current Source Delay
(50% levels)
Shutdown to on
Standby to on
On to Standby
40
2
0.3
60 µs
µs
µs
Current Source Transient Time
(10%-90%)
TRISE
TFALL
1
0.3
µs
µs
Stand-by to Shutdown Time VEN = 0V 10 20 40 ms
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. As determined by average current based on R
SET resistance.

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: MIC4801

Heb je hulp nodig?

Als je hulp nodig hebt met Microchip MIC4801 stel dan hieronder een vraag en andere gebruikers zullen je antwoorden


Handleiding Niet gecategoriseerd Microchip

Microchip

Microchip AT32UC3A3256 Handleiding

10 April 2024
Microchip

Microchip AT32UC3A364 Handleiding

10 April 2024
Microchip

Microchip AT32UC3B0256 Handleiding

10 April 2024
Microchip

Microchip AT32UC3A0512 Handleiding

10 April 2024
Microchip

Microchip AR1010 Handleiding

10 April 2024
Microchip

Microchip AT32UC3C0256C Handleiding

10 April 2024
Microchip

Microchip AT32UC3A364S Handleiding

10 April 2024
Microchip

Microchip AT32UC3C1256C Handleiding

10 April 2024
Microchip

Microchip AT32UC3A1128 Handleiding

10 April 2024
Microchip

Microchip AR1100BRD Handleiding

10 April 2024

Handleiding Niet gecategoriseerd

Nieuwste handleidingen voor Niet gecategoriseerd

Playtive

Playtive IAN 327221 Handleiding

1 Mei 2024
Samsung

Samsung UN32J4001AF Handleiding

1 Mei 2024
Bauknecht

Bauknecht KSI 18GF2 P2 Handleiding

27 April 2024
Fakir

Fakir Artemis TS 150 Handleiding

26 April 2024
Sony

Sony UTX-M03 Handleiding

26 April 2024
Sony

Sony URX-P03 Handleiding

26 April 2024
Sony

Sony WRU-806B Handleiding

26 April 2024
Sony

Sony UTX-B03 Handleiding

26 April 2024
Sony

Sony UTX-P03 Handleiding

26 April 2024
Sony

Sony ODS-L10 Handleiding

26 April 2024