Texas Instruments LM25122-Q1 Wide-Input Synchronous Boost Controller
Texas Instruments LM25122-Q1 Wide-Input Synchronous Boost Controller is a multiphase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The switching frequency is programmable up to 600kHz. Higher efficiency is achieved by two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode also enables discontinuous mode operation for improved efficiency at light load conditions.
Features
- AEC-Q100 qualified with the following results
- Device temperature grade 1: -40°C to +125°C ambient operating temperature range
- Device HBM ESD classification level 2
- Device CDM ESD classification level C6
- 42V maximum input voltage
- 3V minimum input voltage (4.5V for startup)
- Output voltage up to 50V
- Bypass (VOUT = VIN) operation
- 1.2V reference with ±1.0% accuracy
- Free-run and synchronizable switching to 600kHz
- Peak current-mode control
- Robust 3A integrated gate drivers
- Adaptive dead-time control
- Optional diode emulation mode
- Programmable cycle-by-cycle current limit
- Hiccup mode overload protection
- Programmable line UVLO
- Programmable soft-start
- Thermal shutdown protection
- Low 9μA shutdown quiescent current
- Programmable slope compensation
- Programmable skip cycle mode reduces standby power
- Allows external VCC supply
- Inductor DCR current sensing capability
- Multiphase capable, thermally enhanced 20-pin HTSSOP
Applications
- 12V, 24V, and 48V power systems
- Automotive start-stop
- Audio power supply
- High current boost power supply
Functional Block Diagram
Opublikowano: 2016-01-12
| Zaktualizowano: 2025-03-06