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Product Detailed Parameters
- Description：REGULATING PULSE WIDTH MODULATOR
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive and Negative
- Topology：Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
- Number of Outputs：2
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：7V ~ 35V
- Frequency - Switching：1Hz ~ 600kHz
- Duty Cycle (Max)：49%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Reset, Soft Start
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-CLCC
- Supplier Device Package：20-LCCC (8.89x8.89)
- Grade：-
- Qualification：-
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Overview
The Texas Instruments 85515022A is a regulating pulse width modulator, functionally equivalent to the UC1526A series. It operates as a voltage-mode DC-DC switching controller with a maximum switching frequency of 500 kHz and a peak current capability of 0.2 A. The device utilizes CMOS technology and is housed in a 20-pin LCCC (FK) package. It supports a wide operating temperature range from -55°C to +125°C.
Feature Summary
- Integrates clock synchronization capabilities for multi-phase or parallel system applications.
- Provides comprehensive control features including enable logic, frequency control, reset functionality, and soft-start mechanisms.
- Supports duty cycle adjustment up to a maximum of 49%.
Applications
- AC/DC power supply controllers
- Voltage-mode regulated power converters
- Industrial power management systems
Procurement Notes
Verify component authenticity through authorized TI channels or certified distributors. Confirm the specific suffix matches the required package and temperature grade. Request official datasheets and reliability data sheets prior to integration. Ensure compliance with RoHS directives if applicable to the target market.
Selection Notes
Select this component for designs requiring robust voltage-mode control with integrated soft-start and reset features. Consider the 20-pin LCCC package constraints for PCB layout. Evaluate the 500 kHz frequency limit against thermal and efficiency requirements. Verify compatibility with external MOSFET drivers regarding the 0.2 A output current specification.
Part Context
This part belongs to the UC1526A family of regulating pulse width modulators manufactured by Texas Instruments. It serves as a legacy or alternative source for industrial-grade power management solutions. The component is categorized under AC/DC controllers and switching regulators within the manufacturer's portfolio.
Replacement Considerations
Direct substitutes include other UC1526A variants from Texas Instruments. Verify pinout compatibility and electrical specifications before substitution. Cross-reference with equivalent parts from other manufacturers only if functional parameters match exactly.
