Current-Mode PWM Controller

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 N-Channel MOSFETs is low when it is in the off state.
Major differences between members of these series are the UVLO thresholds and maximum duty-cycle ranges. Typical UVLO thresholds of 16 V (on) and 10 V (off) on the TLx842 and TLx844 devices make them ideally suited to off-line applications. The corresponding typical thresholds for the TLx843 and TLx845 devices are 8.4 V (on) and 7.6 V (off). The TLx842 and TLx843 devices CAN operate to duty cycles approaching 100%. A duty-cycle range of 0 to 50% is obtained by the TLx844 and TLx845 by the addition of an internal toggle Flip-Flop which blanks the output off every other Clock cycle.
The TL284x-series devices are characterized for operation from ?40C to 85C. The TL384x-series devices are characterized for operation from 0 to 70C.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
TL3842DG4-8 Texas Instruments 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8
TL3842BD-8 Texas Instruments High-Performance Current-Mode PWM Controller 8-SOIC 0 to 70
TL3842DRE4 Texas Instruments 1A SWITCHING REGULATOR, 500kHz SWITCHING FREQ-MAX, PDSO14, GREEN, PLASTIC, SOIC-14
TL3842BDR Texas Instruments High-Performance Current-Mode PWM Controller 14-SOIC 0 to 70
TL3842DRE4-8 Texas Instruments Current-Mode PWM Controller 8-SOIC 0 to 70
TL3842BDR-8 Texas Instruments High-Performance Current-Mode PWM Controller 8-SOIC 0 to 70
TL3842DE4-8 Texas Instruments Current-Mode PWM Controller 8-SOIC 0 to 70
TL3842PE4 Texas Instruments Current-Mode PWM Controller 8-PDIP 0 to 70
TL3842BPE4 Texas Instruments High-Performance Current-Mode PWM Controller 8-PDIP 0 to 70
TL3842DG4 Texas Instruments 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, GREEN, PLASTIC, MS-012AB, SOIC-14
TL3842 's PackagesTL3842 's pdf datasheet
TL3842D SOIC
TL3842D-8 SOIC
TL3842DE4 SOIC
TL3842DE4-8 SOIC
TL3842DG4 SOIC
TL3842DG4-8 SOIC
TL3842DR SOIC
TL3842DR-8 SOIC
TL3842DRE4 SOIC
TL3842DRE4-8 SOIC
TL3842DRG4 SOIC
TL3842DRG4-8 SOIC
TL3842P PDIP
TL3842PE4 PDIP




TL3842 Pinout, Pinouts
TL3842 pinout,Pin out
This is one package pinout of TL3842,If you need more pinouts please download TL3842's pdf datasheet.

TL3842 Application circuits
TL3842 circuits
This is one application circuit of TL3842,If you need more circuits,please download TL3842's pdf datasheet.


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