# UC1823L - Texas Instruments PWM Controller

## Product Summary

The Texas Instruments UC1823L is a High Speed PWM Controller designed for switched mode power supply applications. It supports multiple topologies and offers features like soft start and pulse-by-pulse current limiting.

## Product Information

| Field | Value |
| --- | --- |
| Part Number | UC1823L |
| Manufacturer | Texas Instruments |
| Product Type | PWM Controller |
| Series | UC1823 |
| Category | Uncategorized |
| Subcategory | Linear Regulator Controllers |
| Package | CDIP (J) |

## Description

The UC1823L from Texas Instruments is a High Speed PWM Controller optimized for high-frequency switched mode power supply applications. It is designed for use in either current-mode or voltage-mode systems and supports Boost, Buck, Flyback, and Forward topologies.

Key electrical characteristics include a maximum duty cycle of 85%, a propagation delay to output of 50ns, and a peak output current of 1.5A. The controller features a wide bandwidth error amplifier, fully latched logic with double pulse suppression, and pulse-by-pulse current limiting. It also includes soft start/max duty cycle control and under-voltage lockout with hysteresis. The trimmed bandgap reference provides a stable 5.1V ±1% output.

This PWM controller operates at switching frequencies up to 1.0MHz and has a low start-up current of 1.1mA. It is available in CDIP (J) and LCCC (FK) packages. The UC1823L is noted as not recommended for new designs, with alternatives like the TL494 available for new projects.

Applications for this controller include various switched mode power supplies where high frequency operation and precise control are required. Its robust feature set makes it suitable for demanding power conversion designs.

## Availability and Pricing

| Field | Value |
| --- | --- |
| Stock Status | In Stock |
| Distributor Count | 1 |
| Total Stock | 38 |
| Price | $37.03 |
| Pricing Available | Yes |

## Estimated Pricing

| Quantity | Price Range |
| ---: | ---: |
| 1+ | $37.03 |

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 | 38 |  |  |  |  |

## Features

- High Speed PWM Controller IC.
- Supports Boost, Buck, Flyback, Forward topologies.
- Maximum duty cycle of 85%.
- 50ns propagation delay to output.
- 1.5A peak output current.

## Applications

- Optimized for high frequency SMPS.
- Suitable for current-mode systems.
- Suitable for voltage-mode systems.
- Designed for power conversion applications.

## 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/9a/ce/74/fk0020a.png
- Product Page: https://distyparts.com/product/uc1823l
- RFQ URL: https://distyparts.com/product/uc1823l#rfq

## FAQs

### What is the maximum duty cycle for the UC1823L?

The maximum duty cycle for the UC1823L is 85%.

### What is the propagation delay to output for the UC1823L?

The propagation delay to output for the UC1823L is 50 ns.

### What is the peak output current of the UC1823L?

The UC1823L has a high current totem pole output capable of 1.5A peak.

### What is the reference voltage for the UC1823L?

The UC1823L features a trimmed bandgap reference of 5.1V ±1%.

### What is the start-up current for the UC1823L?

The UC1823L has a low start-up current of 1.1mA.

### What is the maximum switching frequency for the UC1823L?

The UC1823L can operate at switching frequencies up to 1.0 MHz.

### What topologies does the UC1823L support?

The UC1823L supports Boost, Buck, Flyback, and Forward topologies.

## Related Pages

- Manufacturer: https://distyparts.com/manufacturer/texas-instruments
- Category: https://distyparts.com/category/uncategorized/new-products
- Product Page: https://distyparts.com/product/uc1823l
- Markdown File: https://distyparts.com/product/uc1823l.md
- TXT File: https://distyparts.com/product/uc1823l.txt