STMicroelectronics LED200x Monolithic Step-Down DC-DC Converters
STMicroelectronics LED200x Monolithic Step-Down DC-DC Converters are 850kHz converters designed to operate as a precise constant current source with an adjustable current capability up to 4A DC. The embedded PWM dimming circuitry offers LED brightness control. The size of the overall application is minimized due to the high switching frequency and ceramic output capacitor compatibility. The STMicroelectronics LED200x Converters are protected against thermal overheating, overcurrent, and output short-circuit.
Features
- 3V to 18V operating input voltage range
- 850kHz fixed switching frequency
- 100mV typ. current sense voltage drop
- PWM dimming
- ±7% output current accuracy
- Synchronous rectification
- 95mΩ HS / 69mΩ LS typical RDS(on)
- Peak current-mode architecture
- Embedded compensation network
- Internal current limiting
- Ceramic output capacitor compliant
- Thermal shutdown
Applications
- High brightness LED driving
- General lighting
- Halogen bulb replacement
- Signage
Block Diagram
Typical Application Circuit
Pubblicato: 2012-10-05
| Aggiornato: 2022-03-11