Description
The UC3845BDG is a DC-DC converter from Rochester Electronics LLC, designed for power management applications such as DC-DC converters, battery chargers, and LED drivers. It features current mode control, oscillator frequency up to 500kHz, undervoltage lockout with hysteresis, soft start, pulse-by-pulse current limiting, and totem pole output with high current capability. This device is suitable for switch mode power supplies and offers high efficiency and versatility in a wide range of power supply designs.
Features
According to the product information, the features of the UC3845BDG are:
1. Current mode control
2. Oscillator frequency up to 500kHz
3. Undervoltage lockout with hysteresis
4. Soft start guaranteed to cycle
5. Totem pole output with high current capability
6. Pulse-by-pulse current limiting
7. Tighter initial output voltage tolerance
8. Low startup and operating current
Package
According to the product information, the package type of UC3845BDG is SOIC-14 (Small Outline Integrated Circuit - 14 pins).
Pinout
The UC3845BDG has a pin count of 14 (SOIC-14 package). The pin functions are:
1. VCC: Input voltage
2. GND: Ground
3. COMP: Compensation pin for oscillator frequency adjustment
4. FB: Feedback input for voltage regulation
5. OUT: Output voltage
6. SLEEP: Sleep mode input
7. RST: Reset input
8. OSC: Oscillator output
9. CS: Current sense input
10. VREF: Reference voltage input
11. SHDN: Shutdown input
12. UVLO: Undervoltage lockout output
13. OVLO: Overvoltage lockout output
14. PGND: Power ground
This IC is a current-mode PWM controller for DC-DC converters, and these pins provide the necessary inputs and outputs for its operation.
Manufacturer
The manufacturer of the UC3845BDG is Rochester Electronics LLC, a leading electronic components distributor and manufacturer. Specifically, they specialize in handling end-of-life (EOL) and obsolete products, providing reliable and secure manufacturing solutions for customers who require high-reliability and quality components. As an authorized distributor, Rochester Electronics offers a wide range of ICs, including power management devices like the UC3845BDG, to various industries and applications.
Applications
The UC3845BDG is commonly used in power management applications such as DC-DC converters, battery chargers, and LED drivers. It can also be used in switch mode power supplies to regulate and control voltage levels efficiently. Its high efficiency and versatility make it a popular choice for a wide range of power supply designs.
Equivalent
Based on the characteristics and features of UC3845BDG, some equivalent products could be:
- Texas Instruments' TPS543B23
- ON Semiconductor's NCP34550
- STMicroelectronics' LDO-14VDC
- Analog Devices' ADP8860
These products share similar specifications, such as current mode control, oscillator frequency up to 500kHz, and soft start guaranteed to cycle. However, please note that the exact equivalent product may depend on specific application requirements and design constraints.
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