AS1101 AMSCO, AS1101 Datasheet

AS1101

Manufacturer Part Number

AS1101

Description

(AS1101 - AS1104) Low-Dropout LED Drivers

Manufacturer

AMSCO

Datasheet

1.AS1101.pdf (13 pages)

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A S 11 0 1 , A S 11 0 2 , A S 11 0 3 , A S 11 0 4

L o w - D r o p o u t L E D D r i v e r s

1 General Description

The AS110x family are LED drivers providing matched

current source bias for any color LED, including white

and blue. LED current is programmable using an exter-

nal resistor.

The AS1101 LED currents are typical 460 x I

LED) at an LED cathode voltage of 150mV and typical

650 x I

The AS1102, AS1103, and AS1104 LED currents are

typical 230 x I

of 150mV and typical 325 x I

age of 1V where I

resistor connected to the CTRL pin.

The AS110x family can drive up to 4 high-current LEDs.

The AS1101, AS1102, and AS1104 incorporate a chip-

enable feature via pin ON. When the devices are dis-

abled, the supply current drops to less than 1µA.

The devices are pin-to-pin compatible to the FAN5611,

FAN5612 and FAN5614.

The AS1101, AS1102, and AS1103 are available in a

6-pin SC70 package; the AS1104 is available in a 8-pin

MSOP package.

Figure 1. Typical Application Diagrams

www.austriamicrosystems.com

SET

ENABLE

SET

at an LED cathode voltage of 1V.

(3V)

SET

(per LED) at an LED cathode voltage

SET

is the current through the external

2 Diode Control with On/Off

CTRL

4 Diode Control

I1/I2

SET

AS1101

AS1103

GND

at an LED cathode volt-

GND

I3/I4

SET

(per

DataSheet4U.com

Revision 1.3

2 Key Features

3 Applications

The AS110x devices are ideal for LED displays and key-

board backlights, as well as lighting management units

for battery powered audio devices such as MP3 and CD

players, mobile and cordless phones, PDAs, portable

DVD players, and consumer electronics.

ENABLE

LED Drivers for Parallel-Connected LEDs

Ultra-Low Voltage Drop: Less Than 150mV (for Li-

ion Battery Support)

Analog and PWM Brightness Control

Up to 80mA per LED (AS1101)

Up to 40mA per LED (AS1102, AS1103, AS1104)

No Electromagnetic Interference, No Switching-

Noise

Current-Matching Requires No External Compo-

nents

Active-Low Shutdown Mode (AS1101, AS1102,

and AS1103)

Low Shutdown-Current: Less Than 1µA

SC70-6 Package (AS1101, AS1102, and AS1103)

MSOP-8 Package (AS1104)

Pin-to-Pin Compatible to FAN5611, FAN5612, and

FAN5614

SET

(3V)

a u s t r i a

SET

3 Diode Control with On/Off

CTRL

4 Diode Control with On/Off

CTRL

AS1104

AS1102

m i c r o

GND

s y s t e m s

D a t a S h e e t

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