TL3843D-8

TEXAS INSTRUMENTS  TL3843D-8  控制器, PWM, 25V-12V电源, 500 kHz, 30V/200mA输出, SOIC-8

The is a current-mode Pulse Width Modulation PWM Controller integrated provides the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an under voltage lockout UVLO, featuring a start-up current of less than 1mA and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation PWM comparator that also provides current-limit control and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.

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Optimized for off-line and DC to DC converters

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<1mA Low start-up current

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Automatic feed forward compensation

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Pulse-by-pulse current limiting

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Enhanced load response characteristics

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Under-voltage lockout with hysteresis

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Double pulse suppression

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High current totem pole output

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Internally trimmed bandgap reference

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Error amplifier with low output resistance

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Green product and no Sb/Br