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See Technical Specifications

UC3844AN

30-V, 1A, 500KHz current mode PWM controller with 16V/10V UVLO 50% duty cycle, 0°C to 70°C

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

UC3844AN
Datasheet:

UC3844AN 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 UC3844AN

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UC3844AN General Description

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10 mA at less than 1.2 V for V_CC over 5 V.

Key Features

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
Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

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)	10V ~ 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	Through Hole	Base Product Number	UC3844