SG3524NS Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments SG3524NS is a voltage-mode PWM regulating pulse-width modulator IC in a 16-pin SOIC package supporting input voltages from 8 V to 40 V. It controls switching power supply topologies including push-pull, half-bridge, and full-bridge converters for industrial power and DC-DC regulation designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SG3524NS Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Voltage-mode PWM control for push-pull, half-bridge, and full-bridge topologies
- Wide input voltage range from 8 V to 40 V nominal 20 V
- 16-pin SOIC package for compact SMD power converter boards
- Dual complementary output drives for symmetrical switching
- Adjustable oscillator frequency for converter switching rate optimization
- Built-in current limiting and soft-start for safe power-up sequencing
Applications
The SG3524NS is used as the PWM controller in industrial DC-DC converters, uninterruptible power supplies, and off-line switching regulators operating from 8 V to 40 V input rails. Its voltage-mode control architecture and dual complementary outputs make it suitable for telecom power supplies, motor drive gate drives, and battery charger circuits where regulated high-efficiency switching conversion is required.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 8V |
| Input Voltage-Nom | 20V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 0.1A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 450kHz |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SG3524NS:
Switching Controller, Voltage-mode, 0.1A, 722kHz Switching Freq-Max, BIPolar, PDIP16
Frequently Asked Questions
What input voltage range does the SG3524NS support for switching power supply designs?
The SG3524NS accepts input voltages from 8 V to 40 V with a nominal operating point of 20 V. This wide range accommodates industrial 24 V bus systems, 12 V automotive rails, and unregulated rectified mains-derived supplies, making it flexible for a broad class of DC-DC and switching regulator designs without requiring additional voltage translation circuitry.
Which switching converter topologies is the SG3524NS designed to control?
The SG3524NS is designed for voltage-mode PWM control of push-pull, half-bridge, and full-bridge converter topologies. Its dual complementary outputs provide the alternating drive signals required for these symmetrical topologies, enabling efficient power transfer in isolation transformer-based power supplies operating at duty cycles set by the internal oscillator and error amplifier.
How does the SG3524NS protect against startup transients and overcurrent faults?
The SG3524NS includes a built-in soft-start function that gradually ramps the PWM duty cycle during power-up, preventing inrush current spikes that could damage output capacitors or downstream load circuits. It also incorporates current limiting that reduces duty cycle when the sensed current exceeds a programmed threshold, protecting power switches in the 8 V to 40 V input converter stage.
Can the SG3524NS switching frequency be externally adjusted, and what range is practical?
Yes, the SG3524NS oscillator frequency is set by external resistor and capacitor values connected to the timing pin. Practical switching frequencies range from below 1 kHz to above 100 kHz, allowing the designer to optimize the trade-off between transformer core size and switching losses. Higher frequencies reduce magnetic component size but increase switching losses in the power MOSFETs or bipolar transistors connected to the 16-pin SOIC outputs.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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