LED 驱动器 Power Management Texas Instruments Incorporated
LED-driver considerations
By Michael Day (Email: m-day@ti.com)
Applications Manager, Portable Power Products
Many of today’s portable electronics require backlight
Figure 1. Voltage source with ballast resistor
LED-driver solutions with the following features: direct
control of current, high efficiency, PWM dimming, over-
voltage protection, load disconnect, small size, and ease of
use. This article discusses each of these features and how
they are achieved, and concludes with a typical circuit
that implements each of these features.……
