9

UC1826

UC2826

UC3826

control loop keeps the load from exceeding its current

limit. If the ILIM pin is connected to VREF, the Voh is set

at 3.0V. The maximum current limit clamp can be re-

duced by reducing the voltage on ILIM to less than 3.0V

as described in the ILIM pin description.

Design Example: Figure 7 is an open loop test that lets

the user test the circuit blocks discussed without having

to build an entire control loop. The pulse width can be

shows an isolated power supply using the UC1826 sec-

ondary side average current mode controller.

CIRCUIT BLOCK DESCRIPTION (cont.)

Figure 7. Open Loop Circuit

UDG-95017-1