The TL3843D-8 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.
● Optimized for off-line and DC to DC converters
● <1mA Low start-up current
● Automatic feed forward compensation
● Pulse-by-pulse current limiting
● Enhanced load response characteristics
● Under-voltage lockout with hysteresis
● Double pulse suppression
● High current totem pole output
● Internally trimmed bandgap reference
● Error amplifier with low output resistance
● Green product and no Sb/Br
