MT7815B中文資料美芯晟數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

DESCRIPTION

MT7815B is a high precision LED constant

current controller operating at critical conduction

mode (CRM) with zero current switched-on and

peak current switched-off. It’s mainly targeted for

non-isolated buck LED power systems and

PWM/Analog dimmable application.

Critical conduction mode ensures that the

MT7815B turns on the internal switch when the

inductor current reaches zero, reducing the

switch-on switching losses, and achieving more

than 93% efficiency.

With critical conduction mode, and the input

compensation, MT7815B outputs high accuracy

LED current, and further achieves excellent line

regulation and load regulation.

MT7815B has wide working voltage range, which

is suitable for full-range AC input or 12V ~ 500V

DC input voltage. MT7815B provides various

protection features to improve the system

reliability, including over current protection (OCP),

short circuit protection (SCP), adjustable over

voltage protection (OVP) and over temperature

regulation (OTR), etc.

FEATURES

Critical Conduction Mode, insensitive to the

inductance

PWM/ Analog dimming function

High efficiency (up to 93%)

Highly accurate constant LED current

Cycle-by-cycle current limiting

LED short circuit protection

Adjustable LED over voltage protection

Leading edge blanking technique

Under-voltage lockout (UVLO) protection

Over temperature regulation (OTR)

Available in SOT23-6 package

APPLICATIONS

LED tube, signal lamp, landscape lamp

LED stage light, etc

Intelligent LED lighting application