Current-Mode PWM ControllerThe 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 | |
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TL3842DR | Texas Instruments | Current-Mode PWM Controller 14-SOIC 0 to 70 | |||
TL3842BDG4 | Texas Instruments | 1A SWITCHING REGULATOR, 500kHz SWITCHING FREQ-MAX, PDSO14, GREEN, PLASTIC, SOIC-14 | |||
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 | |||
TL3842D-8 | Texas Instruments | Current-Mode PWM Controller 8-SOIC 0 to 70 | |||
TL3842DRG4-8 | Texas Instruments | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8 | |||
TL3842BDRG4-8 | Texas Instruments | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8 | |||
TL3842DE4 | Texas Instruments | 1A SWITCHING REGULATOR, 500kHz SWITCHING FREQ-MAX, PDSO14, GREEN, PLASTIC, SOIC-14 | |||
TL3842P | Texas Instruments | Current-Mode PWM Controller 8-PDIP 0 to 70 | |||
TL3842BP | Texas Instruments | High-Performance Current-Mode PWM Controller 8-PDIP 0 to 70 |
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TL3842 Pb-Free | TL3842 Cross Reference | TL3842 Schematic | TL3842 Distributor |
TL3842 Application Notes | TL3842 RoHS | TL3842 Circuits | TL3842 footprint |