UC3844D - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

UC3844D
Manufacturer

TI
ChipWorker Part#

CW12830738
Category

PWM Controller IC
Package

SOIC-14
Description

Driver; PWM controller; 1A; 1W; Channels:1; 16÷30V; 500kHz; SO14
Documentation

Datasheet

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UC3844D Specifications

Attribute	Attribute Value

Part Number	UC3844D
Manufacturer	TI
ChipWorker Part#	CW12830738
Category	PWM Controller IC
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	14 Pin
Case/Package	SOIC-14
Frequency	500 kHz
Supply Voltage (DC)	12.0V (min)
Operating Voltage	16V ~ 30V
Power Rating	1 W
Number of Outputs	1 Output
Input Voltage (DC)	25.0 V
Output Voltage	13.5 V
Output Current	200 A
Number of Channels	1 Channel
Number of Positions	14 Position
Power Dissipation	725 mW
Quiescent Current	11.0 mA
Number of Regulated Outputs	1 Output
Rise Time	50 ns
Switching Frequency	500 kHz
Topology	Buck, Boost, Flyback, Forward
Duty Cycle	48 %
Output Current (Max)	1 A
Maximum Duty Cycle	50 %
Fall Time	50 ns
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Supply Voltage	10.30 VDC
Supply Voltage (Max)	25 V
Supply Voltage (Min)	12 V
Input Voltage	25 V
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Size-Length	8.65 mm
Size-Width	3.91 mm
Size-Height	1.58 mm
Operating Temperature	0℃ ~ 70℃
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/06/15
ECCN Code	EAR99

Product Description

The UC3844D is a current-mode Pulse Width Modulation (PWM) Controller provides the necessary features to implement off-line or DC to DC fixed frequency current-mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-channel MOSFETs, is low in the off state. Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. It is ideally suited to off-line applications.
Low start-up current
Automatic feed forward compensation
Pulse-by-pulse current limiting
Enhanced load response characteristics
Under-voltage lockout with hysteresis
Double pulse suppression
High current totem pole output
Internally trimmed bandgap reference
Low RO Error amplifier
Green product and no Sb/Br

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