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Product Detailed Parameters
- Description：IC REG CTRLR MULT TOPOLOGY 8SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- 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：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The TL2845DG4-8 is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance DC/DC conversion applications. It operates within an input voltage range of 7.6V to 30V and supports switching frequencies up to 500 kHz. The device features a maximum duty cycle of 50% and provides a peak output drive current of 200 mA. It is housed in an 8-pin SOIC surface-mount package and functions across a temperature range of -40°C to 85°C.
Feature Summary
- Implements current-mode control architecture for improved transient response and simplified compensation.
Applications
- Boost converter topologies
- Flyback power supply designs
- Forward converter circuits
Procurement Notes
Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the 'D' package designation corresponds to the standard SOIC-8 footprint. Ensure the '-8' suffix aligns with the required tape-and-reel quantity specifications for your manufacturing process. Cross-reference the datasheet revision date to ensure compatibility with your design requirements.
Selection Notes
Select this component when designing isolated or non-isolated converters requiring current-mode regulation. It is suitable for applications needing a fixed 50% maximum duty cycle limit. Consider the 200 mA output drive capability for driving external MOSFETs directly. Evaluate the 500 kHz switching frequency against thermal constraints and magnetic component size requirements.
Part Context
This part belongs to the TLx84x family of current-mode PWM controllers from Texas Instruments. It shares functional similarities with industry-standard UC1845 devices but offers specific TI performance characteristics. The G4 suffix denotes environmental compliance, distinguishing it from older non-compliant variants within the same electrical specification set.
Replacement Considerations
The TL2845DG4-8 is functionally pin-compatible with the UC1845 series. Verify that substitute parts maintain the same 50% duty cycle limit and 200 mA output drive strength. Ensure replacement components support the same SOIC-8 package dimensions and operating temperature range.
