UC1846-SP_15 Datasheet, PDF (14/29 Pages) Texas Instruments – Current-Mode PWM Controller

UC1846-SP
SLUS871C – JANUARY 2009 – REVISED OCTOBER 2015
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Device Functional Modes (continued)
7.4.2 Synchronization
The synchronization pin (pin10) can be configured as an output for master/slave application. When the converter
is configured as a master or standalone converter, SYNC (pin 10) is an output. As highlighted in the functional
block diagram, voltage at RT (pin 9) is greater than 4.1-V internal threshold.
When using the part in slave configuration, SYNC pin becomes an input. Typical example of parallel operation
with master/slave configuration is shown in Figure 13. Slave unit CT (pin 8) is grounded and RT pin is connected
to VREF (pin 2).
When using the part in slave configuration, SYNC pin becomes an input. Typical example of parallel operation
with master/slave configuration is shown in Figure 13. Slave unit CT (pin 8) is grounded and RT pin is connected
to VREF (pin 2). Under parallel configuration two or more units can be paralleled, with COMP pins tied together
each will share current equally.
7.4.3 Parallel Operation
Under parallel configuration two or more units can be paralleled, with COMP pins tied together each will share
current equally.
Figure 13 highlights typical parallel operation configuration.
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