UC3845B
1 Adjustable SOP-8 DC DC Switching Controllers RoHS
DC converter applications with minimal external components
- Manufacturer
- UMW
- Manufacturer part #
- UC3845B
- Store part #
- C347460
- Package / case
- SOP-8
- Category
- DC DC Switching Controllers
- Packaging
- Tape & Reel (TR)
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement · policy
15,455 in stock
#C347460
Stock & price checked 6 days ago
| Quantity | Unit price | Pack price |
|---|---|---|
| 5+ | ₹24.91 | ₹124.55 |
| 50+ | ₹19.05 | ₹952.50 |
| 150+ | ₹16.54 | ₹2,481.00 |
| 500+ | ₹13.40 | ₹6,700.00 |
| 2,500+ | ₹12.00 | ₹30,000.00 |
| 5,000+ | ₹11.17 | ₹55,850.00 |
5 × ₹24.91
₹124.55
excl. GST
₹146.97 incl. 18% GST
- Dispatch in 7–10 working days
- GST invoice with every order
- Standard pack: 2,500 per reel
UC3845B
₹124.55 for 5 + GST
Specifications
- Operating Temperature
- 0℃~+70℃@(TA)
- Features
- Cycle-by-cycle current limiting;Frequency synchronization;External compensation
- Number of Channels
- 1
- Topology
- Boost;Flyback
- Frequency - Switching
- 50kHz
- Output Type
- Adjustable
- Switch tube (built-in/external)
- External
- Quiescent Current
- 17mA
Packaging & compliance
- RoHS
- ROHS3 Compliant
- Lifecycle
- Active
- ECCN
- EAR99
- Packaging
- Tape & Reel (TR)
- Standard pack
- 2,500 / Reel
- Sold per
- Piece
- Minimum order
- 5 (multiples of 5)
- Unit weight
- 0.2 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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