Product Summary

The 3843B control integrated circuit provides 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. Internally implemented circuit of 3843B include an undervoltage lockout (UVLO) and a precision reference that is trimmed for accuracy at the error amplifier input.

Parametrics

3843B maximum ratings: (1)Supply voltage 30 V max; (2)Analog input voltage range: –0.3 to 6.3 V; (3)Supply current: 30 mA; (4)Output current: ±1 A; (5)Error amplifier output sink current: 10 mA; (6)Package thermal impedance(3) (4): 14 pin, 86 ℃/W; 8 pin 97 ℃/W ; (7)Output energy: 5 μJ; (8)Virtual junction temperature: 150 ℃; (9)Storage temperature range: –65 to 150 ℃; (10)lead Lead temperature Soldering: 300 ℃.

Features

3843B features: (1)Low Start-Up Current (<0.5 mA); (2)Trimmed Oscillator Discharge Current; (3)Current Mode Operation to 500 kHz; (4)Automatic Feed-Forward Compensation; (5)Latching PWM for Cycle-by-Cycle Current Limiting; (6)Internally Trimmed Reference With; (7)Undervoltage Lockout; (8)High-Current Totem-Pole Output; (9)Undervoltage Lockout With Hysteresis; (10)Double-Pulse Suppression.

Diagrams

3843B pin configuration

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
3843B
3843B

Other


Data Sheet

Negotiable 
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
3843
3843

Pomona Electronics

RF Adapters - In Series TYPE N TO TYPE N

Data Sheet

0-1: $19.28
1-10: $18.72
10-50: $17.78
50-100: $16.90
3843A
3843A

Other


Data Sheet

Negotiable 
3843B
3843B

Other


Data Sheet

Negotiable