UCC1858
UCC2858
UCC3858
APPLICATION INFORMATION (cont.)
UDG-97121-1
Figure 2. Oscillator block diagram.
SYNC
V
CAO
4.75V
4.75V
V
CAO
V
CT
V
CT
>1V
>1V
V
OUT
V
OUT
BOOST
DIODE
CURRENT
BOOST
DIODE
CURRENT
T
S
T
S
Figure 3a. Oscillator timing waveforms synchronized
to buck (DC/DC) PWM.
7
Figure 3b. Oscillator timing waveforms stand alone
operation.