Mfr Part #:

uc1842j

Mfr Name: Unitrode

The Unitrode UC1842J is a Current Mode PWM Controller designed for off-line and DC-to-DC converters. It operates up to 500kHz with a low start-up current.

✓ Total Stock: 52 pcs

$ Price Range: $0.78

uc1842j Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
OTL Components ✓ Non-Authorised Inventory information	52 pcs On Request	52 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

uc1842j Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Unitrode
Lead Style	Gull Wing
Mounting Type	Through Hole
Operating Temperature Range	-55 to 125 °C
SVHC Present	Not Present

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uc1842j Description

Short technical summary and product information.

The UC1842J from Unitrode is a Current Mode PWM Controller designed for efficient implementation of off-line and DC-to-DC fixed-frequency control schemes. It features a low start-up current of less than 1mA and operates at frequencies up to 500kHz.

Key internal circuits include an undervoltage lockout with hysteresis, pulse-by-pulse current limiting, and a high-current totem-pole output stage suitable for driving N-channel MOSFETs. The device also incorporates automatic feedforward compensation and enhanced load-response characteristics.

This controller is housed in a CDIP (JG) package and operates within a temperature range of -55 to 125°C. It is optimized for applications requiring precise current-mode control with minimal external components.

uc1842j Quick Information

Product Type: Current Mode PWM Controller

Canonical Name: UC1842J Current Mode PWM Controller

Subcategory: DC DC Switching Controllers

uc1842j Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

uc1842j Estimated Pricing

Qty	Low	High
1+	$0.78	$0.78

Estimated market price range - modelled values for guidance only, not live distributor offers.

uc1842j Features

Optimized for off-line and DC-to-DC converters.
Low start-up current less than 1mA.
Operates at frequencies up to 500kHz.
Wide operating temperature range of -55 to 125°C.
High-current totem-pole output stage.

uc1842j Applications

Used in off-line power supplies.
Suitable for DC-to-DC converters.
Enables fixed-frequency control schemes.
Applications requiring current-mode control.

uc1842j FAQs

5 frequently asked questions generated from this part’s specifications.

What is the operating temperature range for the UC1842J?

The operating temperature range for the UC1842J is -55 to 125 °C.

What is the maximum operating frequency of the UC1842J?

The UC1842J operates at frequencies up to 500 kHz.

What is the start-up current for the UC1842J?

The start-up current for the UC1842J is less than 1 mA.

What package type is the UC1842J available in?

The UC1842J is available in a CDIP (JG) package.

What is the standard package quantity for the UC1842J?

The standard package quantity for the UC1842J is 50.

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