LED balancing circuit

TN0025

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The power supply source, which is constant, tries to supply the required current, and in

Figure 2.

LED balancing circuit - two transistor power limit, latch

The following two circuits are variations of the power limit circuit in Figure 2 which will

disable the LED balancing circuit but will not latch it off.

Figure 3 and Figure 4 show two variations of power limit circuits, which disable the LED

balancing circuit but do not latch it off.

The circuit in Figure 3 (R11, R12, R13 and Q11) has fewer parts but has a narrower fault

tolerance detection range. Q11 is switched on through either R11 or R13. In the circuit (R11,

R12, D9, D10 and Q11) in Figure 4, Q11 is switched on through diodes D9 or D10.