參數(shù)資料
型號: Q67000-A9284-X201-K5
廠商: SIEMENS AG
英文描述: High Performance Power Combi Controller
中文描述: 高性能功率Combi機(jī)控制器
文件頁數(shù): 9/39頁
文件大?。?/td> 472K
代理商: Q67000-A9284-X201-K5
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
V
PWM 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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