UC3842D - TI

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

Part No

UC3842D
Manufacturer

TI
ChipWorker Part#

CW11740230
Category

PWM Controller IC
Package

SOIC-14
Description

AC to DC Switching Converter Off-Line Switcher 17.5V 500kHz Tube 14Pin SOIC
Documentation

Datasheet

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UC3842D Specifications

Attribute	Attribute Value

Part Number	UC3842D
Manufacturer	TI
ChipWorker Part#	CW11740230
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 mA
Supply Current	17 mA
Number of Channels	1 Channel
Number of Positions	14 Position
Power Dissipation	0.725 W
Number of Regulated Outputs	1 Output
Rise Time	50 ns
Switching Frequency	500 kHz
Topology	Buck, Boost, Flyback, Forward
Duty Cycle	100 %
Output Current (Max)	1 A
Maximum Duty Cycle	97 %
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 Edition	2018/06/27
ECCN Code	EAR99

Product Description

DESCRIPTION
The UC1842/3/4/5 family of control ICs 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.
FEATURES
• Optimized For Off-line And DC To DC Converters
• Low Start Up Current (<1mA)
• 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
• 500khz Operation
• Low ROError Amp

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