UC3843B
1 SOP-8 DC DC Switching Controllers RoHS
DC converter with minimal external components
- Manufacturer
- UMW
- Manufacturer part #
- UC3843B
- Store part #
- C2995531
- Package / case
- SOP-8
- Category
- DC DC Switching Controllers
- Packaging
- Tape & Reel (TR)
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement · policy
51,000 in stock
#C2995531
Stock & price checked 20 h ago
| Quantity | Unit price | Pack price |
|---|---|---|
| 5+ | ₹25.35 | ₹126.75 |
| 50+ | ₹19.51 | ₹975.50 |
| 150+ | ₹16.66 | ₹2,499.00 |
| 500+ | ₹14.12 | ₹7,060.00 |
| 2,500+ | ₹11.59 | ₹28,975.00 |
| 5,000+ | ₹11.17 | ₹55,850.00 |
5 × ₹25.35
₹126.75
excl. GST
₹149.57 incl. 18% GST
- Dispatch in 7–10 working days
- GST invoice with every order
- Standard pack: 2,500 per reel
UC3843B
₹126.75 for 5 + GST
Specifications
- Operating Temperature
- 0℃~+70℃@(TA)
- Features
- Cycle-by-cycle current limiting;External compensation;Frequency synchronization
- Number of Channels
- 1
- Operating Voltage
- 7.6V~30V
- Frequency - Switching
- 47kHz~57kHz
- Switch tube (built-in/external)
- External
- Quiescent Current
- 17mA
Packaging & compliance
- RoHS
- ROHS3 Compliant
- Lifecycle
- Active
- Moisture sensitivity
- MSL 1 (unlimited)
- ECCN
- EAR99
- Packaging
- Tape & Reel (TR)
- Standard pack
- 2,500 / Reel
- Sold per
- Piece
- Minimum order
- 5 (multiples of 5)
- Unit weight
- 0.186 g
Overview
The 3842/43/44/45 series are fixed-frequency current-mode PWM controllers designed for off-line and DC-DC converter applications using minimal external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature-compensated reference voltage, a high-gain error amplifier, a current sensing comparator, and a high-current totem-pole output ideally suited for driving power MOSFETs. Protection features include built-in undervoltage lockout and current limiting. The 3842 and 3844 have undervoltage lockout thresholds of 16V (turn-on) and 10V (turn-off). The corresponding thresholds for the 3843/45 are 8.4V (turn-on) and 7.6V (turn-off). The 3842 and 3843 operate up to 100% duty cycle. The 3844 and 3845 operate up to 50% duty cycle. The startup current for this device family is typically 0.5mA.
Key features
- Low startup and operating current
- High-current totem-pole output
- Undervoltage lockout with hysteresis
- Operating frequency up to 500kHz
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