UC1845J883B

Name: UC1845J883B
Rating: 4.5 (10 reviews)

Current Mode PWM Controller

5,234 有效庫存

UC1845J883B

有效庫存5,234

Current Mode PWM Controller

製造商零件號 # : UC1845J883B
包裝/封裝: CDIP-8
製造商: Texas Instruments
產品分類 : Power Supply Controllers, Monitors

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例子

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UC1845J883B 數據表

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詳細說明

UC1845J883B is a control integrated circuit belonging to the UCx84x series, specifically designed for implementing off-line or DC-to-DC fixed-frequency current-mode control schemes with minimal external components. It is equipped with internal circuits such as undervoltage lockout (UVLO) with a low start-up current, a precision reference trimmed for accuracy, logic for latched operation, a pulse-width modulation (PWM) comparator for current-limit control, and a totem-pole output stage suitable for driving N-channel MOSFETs. The series offers a range of package options, temperature ranges, maximum duty cycle choices, and turnon/turnoff thresholds and hysteresis ranges, catering to various application needs. The UC184x devices are specified for operation from –55°C to 125°C, making them suitable for harsh industrial environments

主要特徵

Symmetric pulse train
PWM current limit adjustment
Adjustable oscillator frequency

規格

以下是所選零件的基本參數，涉及零件的特性及其所屬類別。

Topology	Boost, Flyback, Forward	Control mode	Current
Duty cycle (max) (%)	50	Switching frequency (max) (kHz)	500
Features	Error amplifier, Multi-topology	UVLO thresholds on/off (V)	8.4/7.6
Operating temperature range (°C)	-55 to 125	Rating	Military
Gate drive (typ) (A)	1	Vin (max) (V)	30

常見問題解答

What is UC1845J883B?

The UC1845J883B is a high-performance current mode PWM controller integrated circuit (IC) designed by Texas Instruments. It is commonly used in power supply and motor control applications, offering precise control of output voltage or current.

How Does UC1845J883B Work?

The UC1845J883B operates as a current mode PWM controller, regulating the output voltage or current by adjusting the duty cycle of the PWM signal. It includes various protection and control features such as soft start, overcurrent protection, and overvoltage protection, making it suitable for power supply designs requiring stable and reliable performance.

How Many Pins does UC1845J883B have and What are the Functions of the Pinout Configuration?

The UC1845J883B is housed in a 16-pin ceramic DIP (Dual In-line Package) package. The pinout configuration includes:

VREF: Reference voltage pin for error amplifier.
Rt/Ct: Timing components for oscillator frequency setting.
CS: Current sense input for overcurrent protection.
SS/SD: Soft start or shutdown control pin.
RT: Oscillator timing resistor connection.
CT: Oscillator timing capacitor connection.
COMP: Error amplifier output and compensation pin.
FB: Feedback input for regulation.
OUT: PWM output pin.
VCC: Power supply pin.
GND: Ground connection.

What are the Pros and Cons of UC1845J883B?

Pros:

High Performance: Offers precision control and protection features for demanding power supply and motor control applications.
Flexible Oscillator Frequency: Allows the user to set the oscillator frequency based on the application requirements.
Internal Soft Start: Integrated soft start feature for controlling the startup behavior of the power supply.
Robust Protection: Built-in overcurrent and overvoltage protection enhance reliability in various operating conditions.

Cons:

Package Type: The ceramic DIP package may be larger and less space-efficient compared to modern SMD packages.
External Components: May require additional external components for optimal performance in specific applications.
Complexity: Requires careful consideration of loop compensation and external components for stable operation.

Are There Any Equivalents/Alternatives to UC1845J883B for Recommendation?

The UC1845J from Texas Instruments is an equivalent part with similar functionality.
Alternatives to the UC1845J883B include the SG3525A from STMicroelectronics and the TL494 from Texas Instruments.

快速詢價

UC1845J883B

UC1845J883B

品質保證

運輸與付款

服務與包裝

快速報價

詳細說明

主要特徵

規格

常見問題解答

What is UC1845J883B?

How Does UC1845J883B Work?

How Many Pins does UC1845J883B have and What are the Functions of the Pinout Configuration?

What are the Pros and Cons of UC1845J883B?

Are There Any Equivalents/Alternatives to UC1845J883B for Recommendation?

關注我们

UC1845J883B

UC1845J883B

品質保證

運輸與付款

服務與包裝

快速報價

詳細說明

主要特徵

規格

常見問題解答

What is UC1845J883B?

How Does UC1845J883B Work?

How Many Pins does UC1845J883B have and What are the Functions of the Pinout Configuration?

What are the Pros and Cons of UC1845J883B?

Are There Any Equivalents/Alternatives to UC1845J883B for Recommendation?

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