Datasheet

Control Voltage, E/A Output - V
CL
Control Law Profile in Constant Voltage (CV) Mode
f
SW
(1 / MINP)
I
PP
(peak primary current)
5 V3.55 V2.2 V1.3 V
0.75 V
I
PP(max)
100 kHz
f
SW(min)
f
SW
I
PP
I
PP(max)
/ 4.033 kHz
3.3 kHz
AMFM FM
UCC28710, UCC28711
UCC28712, UCC28713
UCC28714, UCC28715
www.ti.com
SLUSB86 NOVEMBER 2012
During voltage regulation, the controller operates in frequency modulation mode and amplitude modulation mode
as illustrated in Figure 16 below. The internal operating frequency limits of the device are 100 kHz maximum and
f
SW(min)
. The transformer primary inductance and primary peak current chosen sets the maximum operating
frequency of the converter. The output preload resistor and efficiency at low power determines the converter
minimum operating frequency. There is no stability compensation required for the UCC28710 family.
Figure 16. Frequency and Amplitude Modulation Modes
(during voltage regulation)
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Product Folder Links: UCC28710, UCC28711 UCC28712, UCC28713 UCC28714, UCC28715