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TDA16888 데이터시트(Datasheet) 9 Page - Siemens Semiconductor Group

부품명 TDA16888
상세내용  High Performance Power Combi Controller
PDF  39 Pages
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제조사  SIEMENS [Siemens Semiconductor Group]
홈페이지  http://www.siemens.com/
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TDA 16888
Semiconductor Group
9
Data Sheet 1998-05-06
The pulse-width-modulation of the PWM section is trailing edge modulated according to
the PWM ramp signal
V
PWM RMP at pin 15 (PWM RMP) and the input voltage VPWM IN at
pin 14 (PWM IN) (see Figure 18). In contrast to the PFC section, however, the pulse-
width-modulation of the PWM section is trailing edge triggered with respect to the
internal clock reference CLK OUT in order to avoid undesirable electromagnetic
interference of both sections. Moreover the maximum duty cycle of the PWM is limited
to 50% to prevent transformer saturation.
By means of the above mentioned improved current mode control a stable pulse-width-
modulation from maximum load down to no load is achieved. Finally, in case of no load
conditions the PWM section may as well be disabled by shorting pin 13 (PWM SS) to
ground.




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