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. Interleaving function improves ripple current on input or output capacitor by 180 degrees phase shift. Soft-star, the feedback loop short detection, two mode over-voltage-protection, over-current-protection, Over current 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: 24 V
- Junction temperature Tj: –40 to +150°C
- Electrical Characteristics
- VREF output voltage Vref: 5.0 V ± 1.5%
- UVLO operation start voltage Vuvlh: 10.5 V ± 0.7 V
- UVLO operation shutdown voltage Vuvll: 9.3 V ± 0.5 V
- UVLO hysteresis voltage Hysuvl: 1.2 V ± 0.5 V
- 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 Over-voltage-protection
- Mode1: Dynamic OVP corresponding to a voltage rise by dynamic load change.
- Mode2: Static OVP corresponding to over-voltage in stable.
- PFC output Dynamic-under-voltage-protection (DUVP)
- Feedback loop open/short detection
- Master and Slave independence over-current-protection
- 280 μs restart timer
- Slave ZCD signal open detection
- Over current 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 products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| SOP | 1.644 | Get Samples, |
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