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UC3845BD
PDSO14 SOIC-14 UC3845BD - 1A switching controller with 275kHz maximum switching frequency
UC3845BD
PDSO14 SOIC-14 UC3845BD - 1A switching controller with 275kHz maximum switching frequency
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Shipping & Payment
Shipping & Payment
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
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UC3845BD DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
Housed in an 8-pin SOIC package, the UC3845BD offers an excellent solution for applications where space is limited. Its versatility and performance make it a popular choice for switch-mode power supplies, voltage regulators, battery chargers, and inverters
Key Features
- Adjustable output voltage
- Precision voltage reference
- Optimized for high-speed switching
- Pulse-by-pulse shutdown
- Under-voltage lockout protection
- Soft-start capability
- Current limiting
- Low startup and operating current
Application
- Switch mode power supplies
- Power converters
- Battery chargers
- LED and lighting control
- Motor control systems
- Inverters
- DC-DC converters
- Telecommunications equipment
- Networking equipment
- Industrial control systems
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Rohs Code | No | Part Life Cycle Code | Obsolete |
| Part Package Code | SOIC | Pin Count ! | 14 |
| Reach Compliance Code | not_compliant | ECCN Code | EAR99 |
| HTS Code ! | 8542.39.00.01 | Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE | Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 25 V | Input Voltage-Min | 12 V |
| Input Voltage-Nom | 15 V | JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e0 | Length | 8.65 mm |
| Moisture Sensitivity Level | 1 | Number of Functions | 1 |
| Number of Terminals | 14 | Operating Temperature-Max | 70 °C |
| Operating Temperature-Min | Output Current-Max | 1 A | |
| Package Body Material | PLASTIC/EPOXY | Package Code | SOP |
| Package Equivalence Code | SOP14,.25 | Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE | Peak Reflow Temperature (Cel) | 235 |
| Qualification Status ! | Not Qualified | Seated Height-Max | 1.75 mm |
| Surface Mount ! | YES | Switcher Configuration | SINGLE |
| Switching Frequency-Max | 275 kHz | Technology | BIPOLAR |
| Temperature Grade ! | COMMERCIAL | Terminal Finish | TIN LEAD |
| Terminal Form ! | GULL WING | Terminal Pitch ! | 1.27 mm |
| Terminal Position | DUAL | Width | 3.9 mm |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is UC3845BD?
The UC3845BD is a high-performance current mode PWM controller IC designed by Texas Instruments. It is commonly used in switch-mode power supply applications to regulate power output efficiently and accurately.
How Does UC3845BD Work?
The UC3845BD operates as a current mode controller, constantly monitoring the output current to regulate the power supply. It compares the output voltage feedback with a reference voltage to adjust the duty cycle of the PWM signal, controlling the power delivered to the load.
How Many Pins does UC3845BD have and What are the Functions of the Pinout Configuration?
The UC3845BD is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:
- VCC: Supply voltage pin.
- CS: Current sense input for feedback loop.
- RT/CT: Timing resistor/capacitor pin for setting oscillator frequency.
- GND: Ground connection.
- COMP: Compensation pin for output voltage stabilization.
- OUT: PWM output pin.
- FB: Feedback pin for output voltage regulation.
- RT/CT: Timing resistor/capacitor pin for frequency setting.
What are the Pros and Cons of UC3845BD?
Pros:
- Efficiency: Enhances power supply efficiency with current mode control.
- Protection: Provides overcurrent protection for the load.
- Flexibility: Adjustable oscillator frequency for customization.
- Reliability: Ensures stable and accurate power supply regulation.
Cons:
- External Components: May require additional external components for certain applications.
- Complexity: Requires careful design considerations for optimal performance.
Are There Any Equivalents/Alternatives to UC3845BD for Recommendation?
- The UC3844 from Texas Instruments is a similar PWM controller with differences in features and specifications.
- Alternatives to the UC3845BD include the SG3525 from STMicroelectronics and the TL494 from Texas Instruments.
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