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SG1525AJ-JAN
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Product Detailed Parameters
- Description：VOLTAGE MODE PWMS,
- Series：-
- Mfr：Microchip Technology
- Package：Tray
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Push-Pull
- Number of Outputs：2
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：8V ~ 35V
- Frequency - Switching：100Hz ~ 350kHz
- Duty Cycle (Max)：49%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Soft Start
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Through Hole
- Package / Case：16-CDIP (0.300", 7.62mm)
- Supplier Device Package：16-CERDIP
- Grade：Military
- Qualification：MIL-STD-883
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Overview
The SG1525AJ-JAN is a voltage mode PWM controller designed for switching power supplies, operating within an 8V to 35V supply range. It features a +5.1V reference trimmed to ±1% initial accuracy and an oscillator frequency range of 100Hz to 500kHz. The device includes a separate sync input, adjustable dead-time control via a single resistor, and built-in soft-start circuitry requiring only one external capacitor. Input undervoltage lockout ensures safe operation by keeping outputs off during low-voltage conditions. The output stage utilizes a totem-pole design capable of sourcing or sinking over 200mA, with latch-off protection preventing multiple pulses after PWM termination.
Feature Summary
- Integrated +5.1V reference with high initial accuracy eliminates the need for external potentiometers and divider resistors.
- Built-in soft-start and undervoltage lockout mechanisms ensure controlled startup and protect against low-input voltage faults.
- Totem-pole output drivers provide robust current handling capabilities exceeding 200mA for source and sink operations.
- Latch-off logic prevents multiple pulse generation following PWM termination, enhancing system reliability.
Applications
- High-performance switching power supplies
- DC-DC converter designs
- Industrial power management systems
Procurement Notes
Verify that the specific part number matches the required JAN military specification grade. Confirm package type compatibility, as variants exist in different pin counts. Ensure ordering suffixes align with exact radiation data availability if applicable. Cross-reference manufacturer documentation to confirm current production status and compliance with MIL-M38510 standards before finalizing procurement.
Selection Notes
Select this component when precise voltage regulation and robust fault protection are required. The integrated error amplifier common-mode range simplifies feedback network design. Consider the 100Hz to 500kHz oscillator flexibility for various transformer sizes. The latch-off feature is critical for applications demanding strict pulse integrity. Evaluate thermal requirements based on the 400mA output drive capability.
Part Context
This component belongs to the SG1525A/1527A series of regulating pulse width modulators. It shares architectural similarities with commercial counterparts but adheres to stricter MIL-M38510 specifications. The AJ suffix typically denotes ceramic DIP packaging suitable for high-reliability environments. Related models include SG1527AJ for push-pull configurations.
Replacement Considerations
Public confirmed substitute part numbers include SG1525AJ/JAN and SG1525AL/883B. Verify pinout compatibility and electrical parameter equivalence before substitution. Ensure replacement parts meet the same radiation hardness levels if used in aerospace applications.
