DESCRIPTION

PT6904 is a constant-current LED driver IC utilized constant frequency, controls buck, boost or buck-boost switch converter. In each control mode, PT6904 adopts the inductance current continuous conduction, peak current control mode and the feedback of the output current. It’s controlled by the internal transconductance operational amplifier and external adjustable slope compensation, it is able to gain the high precision output current in closed loop.

FEATURES

• >90% efficiency

• Operating voltage: 9V~36V

• Constant-current driver

• Switch control mode: Buck, Boost, Buck-Boost

• Stable operation frequency

• Slope compensation

• Output current closed loop control

• Input current limit, output over voltage protection, output short-circuit protection

• Linear dimming & PWM dimming

• Synchronization

• Soft start

APPLICATIONS

• LED backlight

• Automotive LED lighting

• Other DC/DC LED drivers