# UC1845AJ - Texas Instruments Current Mode PWM Controller

## Product Summary

The Texas Instruments UC1845AJ is a Current Mode PWM Controller designed for off-line and DC-DC converters. It supports Boost, Flyback, and Forward topologies.

## Product Information

| Field | Value |
| --- | --- |
| Part Number | UC1845AJ |
| Manufacturer | Texas Instruments |
| Product Type | Current Mode PWM Controller |
| Category | Uncategorized |
| Subcategory | Current Mode PWM Controller |
| Package | CDIP (JG) 8 |

## Description

The UC1845AJ from Texas Instruments is a Current Mode PWM Controller optimized for off-line and DC-DC converter applications. This device operates with Boost, Flyback, and Forward topologies and features a maximum duty cycle of 50%.

Key electrical characteristics include a low start-up current of less than 0.5mA, a trimmed oscillator discharge current of 8.3mA, and an output stage that can sink at least 10mA during UVLO. The controller supports operation up to 500kHz and includes features such as an error amplifier and multi-topology support.

The UC1845AJ is available in CDIP (JG) 8 and LCCC (FK) 20 package types. It is important to note that this part is not recommended for new designs, and users should consider alternate products for new projects.

## Key Specifications

| Specification | Value |
| --- | --- |
| Duty Cycle | 50% |
| Features | Error amplifier, Multi-topology |
| Storage Temperature | °C ~ °C |
| Tape & Reel | No |
| Topology | Boost, Flyback, Forward |

## Availability and Pricing

| Field | Value |
| --- | --- |
| Stock Status | In Stock |
| Distributor Count | 1 |
| Total Stock | 13 |
| Price | $13.37 |
| Pricing Available | Yes |

## Estimated Pricing

| Quantity | Price Range |
| ---: | ---: |
| 1+ | $13.37 |

Estimated pricing is for guidance only and is not a live distributor offer.

## Distributor Offers

| Distributor | Stock | Unit Price | MOQ | Lead Time | Last Updated |
| --- | --- | --- | --- | --- | --- |
| Partservice | 13 |  |  |  |  |

## Features

- Current mode PWM controller.
- Supports Boost, Flyback, Forward topologies.
- Low start-up current less than 0.5mA.
- Operates up to 500kHz frequency.
- High-current totem pole output.

## Applications

- Used in power supply regulation circuits
- Suitable for high-frequency power management
- Ideal for switch-mode power supplies
- Applicable in voltage regulation modules

## Compliance

| Field | Value |
| --- | --- |
| RoHS Status | RoHS3 Compliant |
| REACH Status | REACH Unaffected |
| Moisture Sensitivity Level | 1 Unlimited |

## Documents and Media

- Image: https://static.distyparts.com/disty-files/images/b9/bd/96/jg0008a.png
- Product Page: https://distyparts.com/product/uc1845aj
- RFQ URL: https://distyparts.com/product/uc1845aj#rfq

## FAQs

### What control mode does the UC1845AJ use?

The UC1845AJ uses Current mode control.

### What topologies are supported by the UC1845AJ?

The UC1845AJ supports Boost, Flyback, and Forward topologies.

### What is the maximum duty cycle for the UC1845AJ?

The maximum duty cycle for the UC1845AJ is 50%.

### What is the start-up current for the UC1845AJ?

The start-up current for the UC1845AJ is less than 0.5mA.

### What is the maximum operating frequency of the UC1845AJ?

The UC1845AJ can operate up to 500kHz.

### What package options are available for the UC1845AJ?

The UC1845AJ is available in CDIP (JG) 8 and LCCC (FK) 20 packages.

## Related Pages

- Manufacturer: https://distyparts.com/manufacturer/texas-instruments
- Category: https://distyparts.com/category/uncategorized/new-products
- Product Page: https://distyparts.com/product/uc1845aj
- Markdown File: https://distyparts.com/product/uc1845aj.md
- TXT File: https://distyparts.com/product/uc1845aj.txt