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UC3843DTR ACTIVE

Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle, 0C to 70C

custom-reels CUSTOM Custom reel may be available
Inventory:

Pricing


Qty Price (USD)
1-99 0.914
100-249 0.703
250-999 0.518
1,000+ 0.37

Additional package qty | carrier options info-circle

Package qty | Carrier 50 | TUBE
Inventory
Qty | Price (USD) 1ku | 0.44 1-99 1.087 100-249 0.836 250-999 0.616 1,000+ 0.44

Quality information

RoHS Yes
REACH Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information info-circle

Information included:

  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
View or download

Export classification

  • US ECCN: EAR99

Packaging information

Package | Pins SOIC (D) | 14
Package qty | Carrier: 2,500 | LARGE T&R
Operating temperature range (°C) 0 to 70
View TI packaging information

Features for the UC3843

  • Optimized for off-line and DC-to-DC converters
  • Low start-up current (< 1 mA)
  • Automatic feedforward compensation
  • Pulse-by-pulse current limiting
  • Enhanced load-response characteristics
  • Undervoltage lockout with hysteresis
  • Double-pulse suppression
  • High-current totem-pole output
  • Internally trimmed bandgap reference
  • Up to 500-kHz operation
  • Error amplifier with low output resistance

Description for the UC3843

The UCx84x series of control integrated circuits provide the features that are necessaryto implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimumnumber of external components. The internally implemented circuits include an undervoltage lockout(UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed foraccuracy at the error amplifier input. Other internal circuits include logic to ensure latchedoperation, a pulse-width modulation (PWM) comparator that also provides current-limit control, anda totem-pole output stage that is 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.

The UCx84x family offers a variety of package options, temperature range options, choiceof maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Deviceswith higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while thedevices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices arespecified for operation from –55°C to 125°C, the UC284x series is specified for operation from–40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.

Inventory:

Pricing


Qty Price (USD)
1-99 0.914
100-249 0.703
250-999 0.518
1,000+ 0.37

Additional package qty | carrier options info-circle

Package qty | Carrier 50 | TUBE
Inventory
Qty | Price (USD) 1ku | 0.44 1-99 1.087 100-249 0.836 250-999 0.616 1,000+ 0.44

Carrier options

You can choose different carrier options based on the quantity of parts, including full reel, custom reel, cut tape, tube or tray.

custom reel is a continuous length of cut tape from one reel to maintain lot- and date-code traceability, built to the exact quantity requested. Following industry standards, a brass shim connects an 18-inch leader and trailer on both sides of the cut tape for direct feeding into automated assembly machines. TI includes a reeling fee for custom reel orders.

Cut tape is a length of tape cut from a reel. TI may fulfill orders using multiple strips of cut tapes or boxes to satisfy the quantity requested.

TI often ships  tube or tray  devices inside a box or in the tube or tray, depending on inventory availability. We pack all tapes, tubes or sample boxes according to internal electrostatic discharge and moisture-sensitivity-level protection requirements.

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Lot and date code selection may be available

Add a quantity to your cart and begin the checkout process to view the options available to select lot or date codes from existing inventory.

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