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Product Detailed Parameters
- Description：IC REG CTRLR MULT TOP 14SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Up, Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Boost, Flyback, Forward
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：7.6V ~ 30V
- Frequency - Switching：Up to 500kHz
- Duty Cycle (Max)：48%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Frequency Control
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：14-SOIC
- Grade：-
- Qualification：-
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Overview
The TL2845DR is a current-mode PWM controller manufactured by Texas Instruments, designed for DC-DC switching applications. It supports Boost, Flyback, and Forward topologies with a fixed switching frequency of 500 kHz. The device features a maximum duty cycle of 48% and an output drive capability of 1 A. It operates within a supply voltage range of 7.6 V to 30 V and provides an adjustable output voltage from 0 V to 30 V. The component is housed in a 14-pin SOIC package and functions within a commercial temperature range of 0°C to 70°C.
Feature Summary
- Implements current-mode pulse width modulation control architecture
- Supports multiple converter topologies including boost, flyback, and forward configurations
- Provides high-current output drive capability for external power switches
Applications
- Boost converter circuits
- Flyback power supply designs
- Forward converter implementations
Procurement Notes
Verify the specific suffix 'DR' indicates the tape and reel packaging format upon ordering. Confirm that the commercial temperature grade (0°C to 70°C) meets the operational requirements of the target environment. Ensure the 14-pin SOIC footprint matches the PCB layout specifications before finalizing procurement.
Selection Notes
Select this component when a fixed 500 kHz switching frequency is required for compact magnetic design. Choose the TL2845DR over the TL3845 variant if the application operates within the commercial temperature range rather than the industrial range. Consider the 14-pin package size relative to available board space compared to the 8-pin alternatives.
Part Context
This part belongs to the TLx84x family of current-mode PWM controllers from Texas Instruments. It serves as a cost-effective solution for general-purpose isolated and non-isolated power supplies. The device integrates essential control loops and protection features commonly found in mid-power switching regulator designs.
Replacement Considerations
The TL3845DR is a verified industrial-grade substitute offering identical electrical performance but extended temperature range. The TL2845BDR-8 is an alternative pin-compatible option in an 8-pin package.
