Data Sheet

10

Rev. 2.1, 2004-01-01

TLE 4305

The TLE 4305 includes an independent voltage control and current control loop. The

internal schematic is shown in Figure 2. For

I

If the supply operates in the overcurrent protection mode, the current loop is active and

reduces the output voltage with constant output current

I

current curve is shown in Figure 5.

Both the current control loop and the voltage control loop are temperature compensated.

Figure 5

Current and Voltage Limit

The voltage or current loop regulator result defines the current into the opto isolator to

control the PWM duty cycle. The LED driver is fully integrated, no external components

are required.

AED02882

V

Q

I

Q

Voltage Regulator Active

Current Regulator Active

V

Q

I

Qmax

Cross Over