UC3845BN High Performance Current Mode PWM Controller IC, DIP8
STMICROELECTRONICS UC3845BN PWM controller for current mode power supplies. Features 52kHz frequency, 12-25V supply, and DIP8 package.
The UC3845BN from STMICROELECTRONICS is a high-performance current mode pulse-width modulation (PWM) controller integrated circuit. It provides all the essential features needed to implement efficient off-line or DC-to-DC fixed frequency current mode control systems with a minimal number of external components. This integration simplifies design and enhances reliability in power supply applications.
Internally, the IC includes a trimmed oscillator for precise duty cycle and frequency control, ensuring stable operation. It features an under-voltage lockout circuit with a start-up current of less than 0.5mA and a precision voltage reference. The architecture incorporates logic for latched operation and a PWM comparator that provides cycle-by-cycle current limiting, offering robust protection for connected power stages.
Key Features
- High Current Output: A totem pole output stage is designed to source or sink high peak currents, making it suitable for driving N-channel MOSFETs efficiently.
- Precision Control: The trimmed oscillator allows for accurate frequency and duty cycle management.
- Enhanced Protection: Features include under-voltage lockout with hysteresis, latching PWM for current limiting, and automatic feed-forward compensation for line regulation.
- Low Power Operation: Designed for low start-up and operating current, improving overall system efficiency.
- Robust Construction: Housed in a through-hole DIP8 package, it is built for durability across a wide operating temperature range from -40°C to 150°C.
This controller is ideal for designing compact and reliable switch-mode power supplies, supporting topologies such as Boost and Flyback converters. Its combination of performance, integrated protection, and ease of use makes it a cornerstone component for advanced power management solutions.
- Power Management Systems
- Switch-Mode Power Supplies (SMPS)
- DC-to-DC Converter Circuits
- Off-line Power Supplies
- Controller Type: Single Ended Controller
- Number of Channels: 1 Channel
- Control Mode: Current Mode Control
- Supply Voltage: 12V to 25V
- IC Package: DIP (Dual In-line Package)
- Number of Pins: 8 Pins
- Mounting Type: Through Hole
- Typical Switching Frequency: 52kHz
- Duty Cycle: 0% to 50%
- Supported Topology: Boost, Flyback
- Operating Temperature Range: -40°C to 150°C
- Input Voltage: 15V
- Output Current: 200mA
- Output Voltage: 5V
- Dimensions (L x W x H): 33mm x 15mm x 43mm
- Weight: 0.5 grams
- Duty Cycle Min: 0%
- Duty Cycle Max: 50%
- Topology: Boost, Flyback
- Operating Temperature Min: -40°C
- Operating Temperature Max: 150°C
- SVHC: No SVHC (25-Jun-2025)
- Controller IC Case Style: DIP
- Frequency: 250kHz
Always follow local regulations and product guidance.
Free standard delivery on UK mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For faulty items, contact us within 14 days for a replacement or refund.
View Full Delivery & Returns PolicySecure Transactions
We take the utmost care with your payment and personal details. Our website employs advanced encryption technology, including Secure Sockets Layer (SSL), to protect your information during transmission. You can verify a secure connection by looking for 'https' and a locked padlock in your browser.
Cookie Policy
Cookies enhance your shopping experience by keeping track of your basket and remembering you when you return. We also use banner advertising based on your browsing history to present products of potential interest.
Security Warning
Beware of phishing scams! We will never ask for personal details via email. If such information is required, we'll request you to contact us by phone. If you receive an email requesting sensitive information, do not respond and let us know immediately.
Recommended Products
Similar Products
You may like
