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