UC2844ADTRG4

Obsolete

Texas Instruments

IC PWM BUCK BST FLYBCK CM 14SOIC

Find alt

Alpha

UC2844ADTRG4

Obsolete

Texas Instruments

IC PWM BUCK BST FLYBCK CM 14SOIC

Find alt

Alpha

Description Specifications Series Pricing CAD Documents

Description

General part information

UC2844 Series

The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to provide latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, designed for driving N-channel MOSFETs, is low when the output stage is in the off state.

The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are good choices for off-line power supplies, while the devices with a narrower hysteresis range are designed for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.

Technical Specifications

Parameters and characteristics for this part

Specification	UC2844ADTRG4

Applications	PWM Controller
Clock Sync	No
Current - Supply	11 mA
Duty Cycle (Max)	50 %
Frequency - Switching (Max)	500 kHz
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Type	PWM
Package Length	0.154 in
Package Name	14-SOIC
Package Width	3.9 mm
Topology	Forward Converter, Boost, Buck, Flyback
Voltage - Input (Maximum)	6.3 V
Voltage - Input (Minimum)	-0.3 V
Voltage - Supply (Maximum)	30 VDC
Voltage - Supply (Minimum)	10 VDC

UC2844 Series

Single ended 500KHz current mode PWM controller with 16V/10V UVLO 50% duty cycle, -40C to 85C

Part	Frequency - Switching (Max)	Output Type	Topology	Number of Outputs	Clock Sync	Duty Cycle (Max)	Package Name	Voltage - Supply (Minimum)	Voltage - Supply (Maximum)	Applications	Operating Temperature (Max)	Operating Temperature (Min)	Current - Supply	Package Width	Package Length	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Mounting Type	Synchronous Rectifier	Output Phases	Voltage - Supply (Vcc/Vdd) Maximum	Voltage - Supply (Vcc/Vdd) Minimum	Control Features	Output Configuration	Function
Texas Instruments UC2844ADTR	500 kHz	PWM	Boost Buck Flyback Forward Converter	1	No	50 %	14-SOIC	10 VDC	30 VDC	PWM Controller	85 °C	-40 °C	11 mA	3.9 mm	0.154 in	-0.3 V	6.3 V	Surface Mount
Texas Instruments UC2844D8TR							8-SOIC	12 VDC	28 V	PWM Controller	85 °C	-40 °C	11 mA	3.9 mm	0.154 in	-0.3 V	6.3 V	Surface Mount
Texas Instruments UC2844D							14-SOIC	12 VDC	28 V	PWM Controller	85 °C	-40 °C	11 mA	3.9 mm	0.154 in	-0.3 V	6.3 V	Surface Mount
Texas Instruments UC2844DTR							14-SOIC	12 VDC	28 V	PWM Controller	85 °C	-40 °C	11 mA	3.9 mm	0.154 in	-0.3 V	6.3 V	Surface Mount
Texas Instruments UC2844AQD8R							8-SOIC	10 VDC	30 VDC	PWM Controller	85 °C	-40 °C	11 mA	3.9 mm	0.154 in	-0.3 V	6.3 V	Surface Mount
Texas Instruments UC2844ADTR	500 kHz	PWM	Boost Buck Flyback Forward Converter	1	No	50 %					85 °C	-40 °C
Texas Instruments UC2844ADTRG4	500 kHz	PWM	Boost Buck Flyback Forward Converter	1	No	50 %	14-SOIC	10 VDC	30 VDC	PWM Controller	85 °C	-40 °C	11 mA	3.9 mm	0.154 in	-0.3 V	6.3 V	Surface Mount
Texas Instruments UC2844D8G4							8-SOIC	12 VDC	28 V	PWM Controller	85 °C	-40 °C	11 mA	3.9 mm	0.154 in	-0.3 V	6.3 V	Surface Mount
Texas Instruments UC2844N							8-DIP 8-PDIP				85 °C	-40 °C		7.62 mm	0.3 in			Through Hole
Texas Instruments UC2844P	500 kHz	Transistor Driver	Boost Buck Flyback Forward	1	No	48 %	8-DIP 8-PDIP				85 °C	-40 °C		7.62 mm	0.3 in			Through Hole	No	1	28 V	12 V	Frequency Control	Isolation Capable Positive	Step-Down Step-Up Step-Up/Step-Down

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Create a free account to access distributor pricing data.

CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

No documents available