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See Technical Specifications

UC2845D +BOM

Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, -40C to 85C

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

UC2845D
Datasheet:

UC2845D Datasheet (PDF)
Output Type:

Transistor Driver
Function:

Step-Up, Step-Down, Step-Up/Step-Down
Output Configuration:

Positive, Isolation Capable
Topology:

Boost, Buck, Flyback, Forward
EDA/CAD Models:

Request Free CAD Models for UC2845D

Description

The Texas Instruments UC2845D is a PWM controller IC designed for off-line and DC-DC converters, battery chargers, motor control, LED drivers, and other power management systems. It features automatic feedforward compensation, pulse-by-pulse current limiting, and enhanced load-response characteristics. The device has a low start-up current of less than 1 mA and an undervoltage lockout with hysteresis to prevent unwanted operation. With a frequency range of up to 500 kHz, the UC2845D is suitable for high-frequency applications. Its high-current totem-pole output and internally trimmed bandgap reference provide reliable performance in various power management systems.

Features

The UC2845D features include:

Optimized for off-line and DC-to-DC converters
Low start-up current (<1mA)
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
Error amplifier with low output resistance

These features make the UC2845D suitable for various power management applications, such as switch-mode power supply (SMPS) designs, battery chargers, motor control, LED drivers, and more.

Package

The package type of UC2845D is SOIC-14 (Small Outline Integrated Circuit - 14 pins).

Manufacturer

The manufacturer of the UC2845D is Texas Instruments (TI), a leading global semiconductor company that designs, manufactures, tests, and sells analog and embedded processing chips.

Applications

The UC2845D is commonly used in switch-mode power supply (SMPS) applications such as offline and DC-DC converters, battery chargers, motor control, LED drivers, and other power management systems due to its high efficiency and reliability.

Equivalent

The equivalent products of UC2845D are:

STP16LP55
NCP1402
UCC28051
LM5114

These PWM controllers offer similar features and performance to the UC2845D, making them suitable alternatives for various power management applications.

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)DC DC Switching Controllers	Series	-
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)	12V ~ 28V	Frequency - Switching	Up to 500kHz
Duty Cycle (Max)	48%	Synchronous Rectifier	No
Clock Sync	No	Serial Interfaces	-
Control Features	Frequency Control	Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Base Product Number	UC2845
Product Category	Switching Controllers	Output Voltage	4.95 V to 5.05 V
Output Current	1 A	Minimum Operating Temperature	- 40 C
Maximum Operating Temperature	+ 85 C	Mounting Style	SMD/SMT
Operating Supply Voltage	30 V	Product Type	Switching Controllers
Factory Pack Quantity	55	Subcategory	PMIC - Power Management ICs
Type	Current Mode PWM Controllers	Unit Weight	0.011923 oz
Package/Case	SOP14