Overview
The SG2525AN is a pulse width modulator (PWM) integrated circuit designed by STMicroelectronics. It is part of the SG3525A series, which offers improved performance and reduced external component count for designing various types of switching power supplies.
This device operates over a wide voltage range of 8V to 35V and features a 5.1V reference voltage trimmed to ±1%. It includes a separate oscillator sync terminal, adjustable deadtime control, and internal soft-start circuitry.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (Vi) | 8 to 35 | V |
| Collector Supply Voltage (VC) | 4.5 to 35 | V |
| Oscillator Frequency Range | 100 Hz to 500 kHz | |
| Reference Output Voltage | 5.1 ± 1% | V |
| Output Current (Source/Sink) | 0 to 200 mA | mA |
| Total Power Dissipation at Tamb = 70 °C | 1000 | mW |
| Junction Temperature Range | -55 to 150 | °C |
| Storage Temperature Range | -65 to 150 | °C |
Key Features
- 8V to 35V operation with a 5.1V reference voltage trimmed to ±1%
- Oscillator frequency range from 100 Hz to 500 kHz with a separate oscillator sync terminal
- Adjustable deadtime control and internal soft-start circuitry
- Pulse-by-pulse shutdown and input undervoltage lockout with hysteresis
- Latching PWM to prevent multiple pulses
- Dual source/sink output drivers capable of sourcing or sinking in excess of 200 mA
- Built-in shutdown terminal for instantaneous turn-off and soft-start recycle
Applications
The SG2525AN is suitable for a wide range of switching power supply applications, including:
- DC-DC converters
- AC-DC converters
- Power factor correction (PFC) circuits
- Motor control systems
- High-frequency power supplies
Q & A
- What is the operating voltage range of the SG2525AN?
The SG2525AN operates over a voltage range of 8V to 35V.
- What is the reference voltage of the SG2525AN?
The reference voltage is 5.1V, trimmed to ±1%.
- What is the oscillator frequency range of the SG2525AN?
The oscillator frequency range is from 100 Hz to 500 kHz.
- Does the SG2525AN have adjustable deadtime control?
Yes, the SG2525AN features adjustable deadtime control.
- What is the maximum output current of the SG2525AN?
The maximum output current is in excess of 200 mA.
- Does the SG2525AN have built-in shutdown and soft-start capabilities?
Yes, it has built-in shutdown and soft-start circuitry.
- What is the purpose of the undervoltage lockout in the SG2525AN?
The undervoltage lockout keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages.
- Can the SG2525AN be synchronized to an external system clock?
Yes, it has a sync input to the oscillator that allows synchronization to an external system clock.
- What is the thermal resistance junction-to-ambient of the SG2525AN in a DIP16 package?
The thermal resistance junction-to-ambient is 50 °C/W.
- What are the storage temperature limits for the SG2525AN?
The storage temperature range is -65 to 150 °C.
