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See Technical Specifications

UCC28083DR +BOM

Current mode push-pull PWM with prog. slope comp, 3.5ms soft start, 12.5/8.3 UVLO, -40°C to 85°C

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

UCC28083DR
Datasheet:

UCC28083DR Datasheet (PDF)
Output Isolation:

Isolated
Internal Switch(s):

No
Topology:

Push-Pull
Voltage - Start Up:

12.5 V
EDA/CAD Models:

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UCC28083DR General Description

The UCC38083DR is a member of the UCC3808x family, renowned for its BiCMOS pulse width modulation architecture that enables efficient switching power supplies. By incorporating dual output stages in a push-pull configuration, this controller optimizes power delivery with reduced dead time and duty cycles below 50%. The addition of a programmable slope compensation ramp enhances control precision, while the internal discharge transistor helps minimize filter capacitance and current sense delay for improved performance. With soft-start interval times and turn on/off thresholds tailored to different applications, the UCC38083DR offers versatility and reliability in power management

Key Features

Programmable Slope Compensation
Internal Soft-Start on the UCC38083/4
Cycle-by-Cycle Current Limiting
Low Start-Up Current of 120 µA and 1.5 mA Typical Run Current
Single External Component Oscillator Programmable from 50 kHz to 1 MHz
High-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source Capability
Current Sense Discharge Transistor to Improve Dynamic Response
Internally Trimmed Bandgap Reference
Undervoltage Lockout with Hysteresis
APPLICATIONS
- High-Efficiency Switch-Mode Power Supplies
- Telecom dc-to-dc Converters
- Point-of-Load or Point-of-Use Power Modules
- Low-Cost Push-Pull and Half-Bridge Applications

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)AC DC Converters, Offline Switches	Series	-
Output Isolation	Isolated	Internal Switch(s)	No
Voltage - Breakdown	-	Topology	Push-Pull
Voltage - Start Up	12.5 V	Voltage - Supply (Vcc/Vdd)	8.3V ~ 15V
Duty Cycle	49%	Frequency - Switching	50kHz ~ 1MHz
Fault Protection	Current Limiting	Control Features	Frequency Control
Operating Temperature	-40°C ~ 85°C (TA)	Mounting Type	Surface Mount
Base Product Number	UCC28083