Datasheet

VIN UVLO
SS
SSSR
1.25V
1.25V
0.45V
1.0V
SS
Primary
SR1, SR2
SSSR
1.0V
VOUT
1.0V
Prebiased Load
COMP
Secondary
Bias
2.0V
LM5045
SNVS699G –FEBRUARY 2011–REVISED MARCH 2013 www.ti.com
Figure 17. Pre-Bias Voltage Startup Waveforms
Soft-Stop Off
The Soft-Start Off (SSOFF) pin gives additional flexibility by allowing the power converter to be configured for
hard-stop during line UVLO and hiccup mode condition. If the SS OFF pin is pulled up to the 5V REF pin, the
power converter hard-stops in any fault condition. Hard-stop drives each control output to a low state
immediately. Refer to Table 1 for more details.
Figure 18. Stop-Stop Waveforms during a UVLO Event
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