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30-V, 1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle 0°C to 70°C

Same as: UC3843ADG4   This part number is identical to the part number listed above. You can only order quantities of the part number listed above.

Inventory: 7,858

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View

Packaging information

Package | Pins Package qty | Carrier Operating temperature range (°C)
SOIC (D) | 14 50 | TUBE
0 to 70
Package | Pins SOIC (D) | 14
Package qty | Carrier 50 | TUBE
Operating temperature range (°C) 0 to 70
View TI packaging information

Features for the UC3843A

  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5 mA)
  • Trimmed Oscillator Discharge Current
  • 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
  • Create a Custom Design Using the UCx84xA With the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

Description for the UC3843A

The UCx84xA family of control devices is a pin-for-pin compatible improved version of theUCx84x family. Providing the necessary features to control current-mode or switched-mode powersupplies, this family of devices has many improved features: startup current is less than 0.5 mA,oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2 V for VCC over 5 V.


Qty Price (USD)
1-99 $1.050
100-249 $0.808
250-999 $0.595
1,000+ $0.425

Additional package qty | carrier options

Package qty | Carrier 2,500 | LARGE T&R
Inventory 28,284
Qty | Price (USD) 1ku | $0.356 1-99 $0.879 100-249 $0.676 250-999 $0.498 1,000+ $0.356
Custom reel may be available