Q67000-A9284-X201-K5 查看數據表（PDF） - Siemens AG

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Q67000-A9284-X201-K5

High Performance Power Combi Controller

Siemens AG 

TDA 16888

Special Features

– High power factor

– Typical 50 µA start-up supply current

– Low quiescent current (15 mA)

– Undervoltage lockout with internal stand-by operation

– Internally synchronized fixed operating frequency ranging from 15 kHz to 200 kHz

– External synchronization possible

– Shutdown of both outputs externally triggerable

– Peak current limitation

– Overvoltage protection

– Average current sensing by noise filtering

1.2

General Remarks

The TDA 16888 comprises the complete control for power factor controlled switched

mode power supplies. With its PFC and PWM section being internally synchronized, it

applies for off-line converters with input voltages ranging from 90 V to 270 V.

While the preferred topologies of the PFC preconverter are boost or flyback, the PWM

section can be designed as forward or flyback converter. In order to achieve minimal line

current gaps the maximum duty cycle of the PFC is about 94%. The maximum duty cycle

of the PWM, however, is limited to 50% to prevent transformer saturation.

Semiconductor Group

2

Data Sheet 1998-05-06

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