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.