AS1102 datasheet(2/14 Pages) TAOS

2 / 14 page

AS1101, AS1102, AS1103, AS1104

Low-Dropout LED Drivers

Dat a Sh eet

www.austriamicrosystems.com

Revision 1.5

1 - 13

1 General Description

The AS1101/AS1102/AS1103/AS1104 are LED drivers

designed to match current source bias for any color

LED, including white and blue. The devices can drive up

to 4 high-current LEDs, and the LED current is program-

mable using an external resistor (RSET).

The AS1101 LED currents are 460 x ISET (per LED, typ)

at an LED cathode voltage (VSAT) of 150mV and 650 x

ISET (typ) at a VSAT of 1V, where ISET is the current

through RSET connected to pin CTRL.

The AS1102, AS1103, and AS1104 LED currents are

230 x ISET (per LED, typ) at a VSAT of 150mV and 325 x

ISET (typ) at a VSAT of 1V.

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 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

2 Key Features

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)

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.

4 Diode Control with Enable

3 Diode Control with Enable

AS1103

4 Diode Control

VIN

AS1101

ISET

2 Diode Control with Enable

VIN

RSET

ENABLE

VSET

(3V)

VSAT

GND

CTRL

I3/I4

I1/I2

ISET

RSET

VSET

(3V)

CTRL

VSAT

AS1102

ISET

VIN

RSET

ENABLE

VSET

(3V)

GND

CTRL

VSAT

AS1104

VIN

GND

VSAT

ISET

RSET

ENABLE

VSET

(3V)

CTRL

AS1102 数据表(PDF) 2 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

AS1102 数据表(HTML) 2 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14

数据表下载

链接网址

AS1102 数据表(PDF) 2 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

AS1102 数据表(HTML) 2 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14

数据表 下载

链接网址

数据表下载