Overview
Description
The R2A20112A controls a boost converter to provide an active power factor correction. The R2A20112A adopts critical conduction mode for power factor correction and realizes high efficiency and a low switching noise by zero current switching. The interleaving function improves ripple current on the input or output capacitor by a 180-degree phase shift. Soft-star, the feedback loop short detection, two-mode overvoltage protection, overcurrent protection, overcurrent ON/OFF timer protection for boost diode short and slave ZCD open detection are built in the R2A20112A, and can constitute a power supply system of high reliability with few external parts.
Features
- Absolute Maximum Ratings
- Supply voltage Vcc: 24V
- Junction temperature Tj: –40°C to +150°C
- Electrical Characteristics
- VREF output voltage Vref: 5.0V ± 1.5%
- UVLO operation start voltage Vuvlh: 10.5V ± 0.7V
- UVLO operation shutdown voltage Vuvll: 9.3V ± 0.5V
- UVLO hysteresis voltage Hysuvl: 1.2V ± 0.5V
- Package
- Pb-free SOP-16
- Functions
- Boost converter control with critical conduction mode
- Interleaving control
- Soft start function for the reference voltage of Error Amp
- Two-mode PFC output overvoltage protection
- Mode 1: Dynamic OVP corresponding to a voltage rise by dynamic load change
- Mode 2: Static OVP corresponding to overvoltage in stable
- PFC output dynamic undervoltage protection (DUVP)
- Feedback loop open/short detection
- Master and Slave independence over-current-protection
- 280μs restart timer
- Slave ZCD signal open detection
- Overcurrent ON/OFF timer protection for boost diode short
Comparison
Applications
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
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