AS1390A - High Power Boost Controller and Buck Converter for LED Backlight
High Power Boost Controller and Buck Converter for LED Backlight
Description
The AS1390A, is a high-power, constant-frequency boost controller with an integrated buck converter. It can be used for the boost converter in TV sets which are optimized for 2D and 3D mode. The continuous conduction mode of the AS1390A 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.
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
- Package: QFN (4x4mm)
Applications
The device is ideal for LED backlighting for LCD - TV sets and monitors.
Block diagram for AS1390A Boost Controller and Buck Converter
AS1390B boost controller and buck converter block diagram