A S 1 3 9 0 A , A S 1 3 9 0 B

H i g h P o w e r B o o s t C o n t r o l l e r a n d B u c k C o n v e r t e r f o r L E D B a c k l i g h t

www.austriamicrosystems.com/Power-Management/AS1390

Revision 1.04

1 - 20

D a t a s h e e t

1 General Description

The AS1390A, AS1390B is a high-power, constant-frequency boost

controller with an integrated buck converter. The AS1390A can be

used for the boost converter in TV sets which are optimized for 2D

and 3D mode. AS1390B is designed for single mode operation.

The continuous conduction mode of the AS1390 provides superior

bandwith and transient response. The two output voltages for the

boost controller (2D and 3D mode) can be programmed with an

external resistor divider.

The buck converter is optimized for suppling a P with 5V.

The AS1390A is available in a 20-Pin QFN (4x4mm) package, the

AS1390B comes in a 16-pin SOIC package.

Figure 1. AS1390A - Typical Application

2 Key Features

High Efficiency: Up to 95%

Supply Voltage Range: 10V to 30V

Boost Output Current: up to 3A

Continuous Conduction Mode

Undervoltage Lockout with hysteresis

Overvoltage, Overcurrent and Overtemperature Protection

Low Dropout Operation: 90% Duty Cycle

Buck always ON, Boost with enable PIN

Packages:

- 20-Pin QFN (4x4mm)

- 16-pin SOIC

3 Applications

The device is ideal for LED backlighting for LCD - TV sets and

monitors.