Analog Devices Inc. LT8391同步降压-升压LED控制器
Linear Technology/Analog Devices LT8391控制器是一款4开关、同步降压-升压控制器。该控制器可以在输入电压高于、低于或等于输出电压的情况下调节输出电压、输入或输出电流。利用峰值-降压/峰值升压电流模式控制方案，可实现可调和可同步的150kHz至650kHz固定频率工作。该控制方案还支持用于实现低EMI的内部±15%三角扩频调制。LT8391控制器具有4V至60V的输入、0V至60V的输出电压能力，并可在工作区之间实现无缝低噪声转换，因而非常适合于汽车、工业、电信以及电池供电系统中的LED驱动器和电池充电器应用。
Analog Devices Inc. LT8391 Controllers offer 4V to 60V input, 0V to 60V output voltage capability, and seamless low-noise transitions between operation regions The controllers are ideal for LED driver and battery and charger applications in automotive, industrial, telecom, and even battery-powered systems.
特性
- 4-switch single inductor architecture aAllows VIN
- Above, below, or equal to VOUT
- Up to 98% efficiency synchronous switching
- Proprietary peak-buck peak-boost current mode
- 4V to 60V VIN range
- 0V to 60V (51V LED) VOUT range
- ±3% LED current accuracy
- 2000:1 external and 128:1 internal PWM dimming
- High-side PMOS PWM switch driver
- Integrated bootstrap diodes
- No top MOSFET refresh noise in buck or boost
- 150kHz to 650kHz adjustable and synchronizable
- Flicker-free spread spectrum for low EMI
- Open and short LED protection with fault reporting
- Available in 28-lead TSSOP with exposed pad and 28-lead QFN (4mm × 5mm)
应用
- Automotive head lamps/running lamps
- High-power LED lighting
LT8391 Typical Application
发布日期: 2017-04-28
| 更新日期: 2022-09-15