This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

Images are for reference only See technical specifications

UC3845AD

In Stock: 7,669

30V,1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 0°C to 70°C

Manufacturers:
Texas Instruments, Inc
Mfr.Part#:
UC3845AD
Datasheet:
UC3845AD Datasheet (PDF)
Package/Case:
SOP14
Product Type:
DC DC Switching Controllers
RoHS:
Lifecycle:
Active
EDA/CAD Models:
Request Free CAD Models for UC3845AD

UC3845AD Information

Description

Here's a concise introduction to the UC3845AD: The UC3845AD is a robust AC-DC controller and regulator from Microsemi Corporation, designed for use in switch mode power supplies, voltage regulators, motor control circuits, and battery chargers. It excels at delivering high efficiency, fast transient response, and precise voltage regulation. This 14-pin SOIC device operates within the range of 7.6V to 30V and features a trimmed oscillator discharge current, automatic feedforward compensation, pulse-by-pulse current limiting, and other advanced capabilities. Its optimized design enables reliable performance in various applications where demanding power conversion requirements are necessary. With its impressive feature set and robust construction, the UC3845AD is an ideal choice for designers seeking to create high-performance power supplies, regulators, or motor control systems.

Features

The UC3845AD features include:

Optimized for Off-Line and DC-DC Converters
Low Start-Up Current (< 0.5 mA)
Trimmed Oscillator Discharge Current
Automatic Feedforward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Undervoltage Lockout With Hysteresis
Double Pulse Suppression
High-Current Totem Pole Output
Internally-Trimmed Bandgap Reference
Up to 500-kHz Operation

These features make it suitable for applications such as switch mode power supplies, voltage regulators, motor control circuits, and battery chargers.

Package

The package type of UC3845AD is SOIC-14 (Small Outline Integrated Circuit - 14 pins).

Manufacturer

The manufacturer of the UC3845AD is Microsemi Corporation, a leading provider of semiconductor solutions.

Applications

The UC3845AD is commonly used in switch mode power supplies, voltage regulators, motor control circuits, and battery chargers. It's also suitable for applications requiring high efficiency, fast transient response, and precise voltage regulation.

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)DC DC Switching Controllers	Output Type	Transistor Driver
Function	Step-Up, Step-Down, Step-Up/Step-Down	Output Configuration	Positive, Isolation Capable
Topology	Boost, Buck, Flyback, Forward	Number of Outputs	1
Output Phases	1	Voltage - Supply (Vcc/Vdd)	7.6V ~ 30V
Frequency - Switching	Up to 500kHz	Duty Cycle (Max)	48%
Synchronous Rectifier	No	Clock Sync	No
Serial Interfaces	-	Control Features	Frequency Control
Operating Temperature	0°C ~ 70°C (TA)	Mounting Type	Surface Mount
Base Product Number	UC3845	Package/Case	SOP14

UC3845AD FAQs

1.Q: Are there any related parts or alternatives to this PWM controller?

A: No direct alternatives are listed, but similar current-mode PWM controllers from TI (e.g., UC3842) or ON Semi may be considered.

2.Q: What is the thermal performance of this device?

A: The max power dissipation is 1000mW, but thermal resistance (θJA) is not provided in the given data.

3.Q: Does this PWM controller meet any industry certification standards?

A: The ECCN is EAR99 (export-controlled but not restricted), but no specific certifications (e.g., AEC-Q100) are mentioned.

4.Q: What is the package type and dimensions of this PWM controller?

A: It comes in a 14-pin SOIC package with max dimensions of 8.74mm (L) × 3.94mm (W) × 1.5mm (H).

5.Q: What are the recommended operating conditions for this device?

A: Operates at 500kHz switching frequency, 30V max input, 0°C to 70°C ambient temperature, and up to 1A output current.

6.Q: What is the maximum operating supply voltage for this PWM controller?

A: The absolute maximum supply voltage is 30V.

7.Q: What are the typical applications for this PWM controller?

A: It is suitable for DC-DC converters in boost/buck topologies, power supplies, and industrial/consumer electronics.

8.Q: What are the key features of this 500kHz current mode PWM controller?

A: Key features include 30V max input, 1A output current, 50% max duty cycle, 8.4V/7.6V UVLO, and operation from 0°C to 70°C.

9.Q: What is the pinout configuration of the Rochester Electronics LLC current mode PWM controller?

A: The device comes in a 14-pin SOIC (Gull-wing) package, but the exact pin functions (e.g., VCC, GND, COMP, etc.) are not specified in the given data. Refer to the datasheet for detailed pinout.

Service Policies and Others

After-Sales & Settlement Related

Payment

Payment Method

TT/Wire Transfer

Paypal

Western Union

Money Gram

For alternative payment channels, please reach out to us at:

[email protected]

Shipping & Packing

Shipping Method

Fedex

UPS

DHL

TNT

Packing

AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.

Warranty

365-Day Product Quality Guarantee

We promise to provide 365 days quality assurance service for all our products.

After Sales Service

Returns and exchanges are supported, provided the items remain in their original condition.

Ratings and Reviews

N

N**s
10/08/2024

12

Good Product. Matches description.
B

B**r
02/20/2024

2

Good product. Good price. Slow delivery.
J

J**n
09/20/2022

8

The quality of the assembly is 4. the connector is not very well soldered, but it is possible. Delivery to the mailbox from the time of the order-1 month.
I

I**h
01/22/2021

14

Ukraine reached the dnieper in 14 days. While i'm soldering. The only thing that i would like a schematic scheme, although many things are intuitive

Write a Review

You need to log in to reply.

Service Support

Email: [email protected]

Teams: [email protected]

Tel: +852 95804164

Qualification

Payment Methods

Shipping Information

Shipped From:
HK warehouse
Expected Shipping Date:
to

(HKT)
Expected Quotation Date:
(HKT)
Supplier Lead-Time:
Call for availability

*Lead times apply to standard orders and are based on business days only. Please contact us for details.

Top Sellers

BQ24780SRUYT

6,822+

SMBus 1-4 cell Buck battery charge controller to support hybrid power boost mode
$1.609
BQ24780SRUYR

5,454+

High-performance power delivery technology
$0.610
LM338T

7,098+

5-A, 40-V, low-IQ, adjustable linear voltage regulator
$0.359

ULN2003ADR

6,848+

50-V, 7-ch darlington transistor array, -20C to 70C
$0.058
TLV62569DBVR

7,860+

2.5V-5.5V input, 2-A high efficiency step-down buck converter in SOT23 and SOT563 package
$0.031
CS1301

3,480+

Multimedia Misc