RT8482应用电路(高电压高电流LED驱动器节制器)

RT8482应用电路(高电压高电流LED驱动器节制器)

The RT8482 is a current mode PWM controller designed to drive an external MOSFET for high current LED applications. With a current sense amplifier threshold of 190mV, the LED current is programmable with src="/data/attachment/portal/201009/ET47944201009301356281.GIF">

Note :
Richtek Green products are :
RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.

Features High Voltage Capability : V_IN Up to 36V, V_OUT Up to 48V
Buck, Boost or Buck Boost Operation
Current Mode PWM with 350kHz Switching Frequency
Easy Dimming : Analog, PWM Digital or PWM Converting to Analog with src="/data/attachment/portal/201009/ET47944201009301356282.GIF">

SOP-16

WQFN-16L 3x3

Typical Applications Circuit

Figure 1. Analog Dimming in Boost Configuration

Figure 2. PWM to Analog Dimming in Boost Configuration

Figure 3. Analog Dimming in Buck-Boost Configuration

Figure 4. Analog Dimming in Buck Configuration