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Documents TL2842, TL2843, TL2844, TL2845
TL3842, TL3843, TL3844, TL3845
SLVS038I – JANUARY 1989 – REVISED JULY 2016 TLx84x Current-Mode PWM Controllers
1 Features 3 Description The TL284x and TL384x series of control integrated
circuits provide 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 undervoltage
lockout (UVLO), featuring a start-up current of less
than 1 mA, 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 Nchannel MOSFETs, is low when it is in the off state. 1 Optimized for Off-Line and DC-to-DC Converters
Low Start-Up Current (< 1 mA) …
