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The SG3525A series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip + 5.1 V reference is trimmed to ±1 % and the input common-mode range of the error amplifier includes the reference voltage eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time ad- justment.
These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuity and the output stages, providing instantaneous.
Figure: PCB Symbol
Figure: Footprint
Figure: 3D Model
Figure: Pinout
Figure: Block Diagram
Figure: Output Circuit
You can download the datasheet from the link given below:
| Product Category: | Switching Controllers |
| Number of Outputs: | 2 Output |
| Switching Frequency: | 100 Hz to 500 kHz |
| Duty Cycle - Max: | 0.49 |
| Output Voltage: | 5 V to 5.2 V |
| Output Current: | 500 mA |
| Minimum Operating Temperature: | - 25 ℃ |
| Maximum Operating Temperature: | + 85 ℃ |
| Mounting Style: | SMD/SMT |
| Package / Case: | SOIC-16 |
| Packaging: | Reel |
| Packaging: | Cut Tape |
| Packaging: | MouseReel |
| Manufacturer: | STMicroelectronics |
| Brand: | STMicroelectronics |
| Fall Time: | 300 ns |
| Moisture Sensitive: | Yes |
| Operating Supply Current: | 14 mA |
| Operating Supply Voltage: | 8 V to 35 V |
| Product Type: | Switching Controllers |
| Rise Time: | 600 ns |
| Series: | SG3525 |
| Factory Pack Quantity: | 2500 |
| Subcategory: | PMIC - Power Management ICs |
| Type: | Voltage Mode PWM Controllers |
| Unit Weight: | 0.010229 oz |
STMicroelectronics is a French-Italian multinational electronics and semiconductors manufacturer headquartered in Plan-les-Ouates near Geneva, Switzerland. The company resulted from the merger of two government-owned semiconductor companies in 1987: "Thomson Semiconducteurs" of France and "SGS Microelettronica" of Italy. It is commonly called "ST", and it is Europe's largest semiconductor chip maker based on revenue. While STMicroelectronics corporate headquarters and the headquarters for EMEA region are based in the Canton of Geneva, the holding company, STMicroelectronics N.V. is incorporated in the Netherlands.
Note: Please check their parameters and pin configuration before replacing them in your circuit.
Pulse width modulation (PWM) is a modulation technique that generates variable-width pulses to represent the amplitude of an analog input signal. The output switching transistor is on more of the time for a high-amplitude signal and off more of the time for a low-amplitude signal.
Pulse Width Modulation (PWM) is a DC supply voltage that is switched on and off at a given frequency for a modulated period of time (duty cycle). Typical uses of a PWM-controlled solenoid are proportional hydraulic or pneumatic solenoid valves (digital control) or proportional current control (position control).
The three conventional types of pulse width modulation are a) Trail Edge Modulation b) Lead Edge Modulation c) Pulse Center Two Edge Modulation.
Pulse Width Modulation, or PWM, is a technique for getting analog results with digital means. Digital control is used to create a square wave, a signal switched between on and off.
Pulse Width Modulation or PWM technology is used in Inverters to give a steady output voltage of 230 or 110 V AC irrespective of the load. In addition to the pulse width modulation, the PWM Inverters have additional circuits for protection and voltage control.
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