SG3525A: PWM Controller
The SG3525A PWM Controller offers improved performance and lower external parts count when implemented for controlling all types of switching power supplies. The on-chip +5.1 V reference is trimmed to +/-1% and the error amplifier has an input common-mode voltage range that includes the reference voltage, thus eliminating the need for external divider resistors. A sync input to the oscillator enables multiple units to be slaved or a single unit to be synchronized to an external system clock. A wide range of deadtime can be programmed by a single resistor connected between the CT and Discharge pins. This device also features built-in soft-start circuitry, requiring only an external timing capacitor. A shutdown pin controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands. The under voltage lockout inhibits the outputs and the changing of the soft-start capacitor when VCC is below nominal. The output stages are totem-pole design capable of sinking and sourcing in excess of 200 mA. The output stage of the SG3525A features NOR logic resulting in a low output for an off-state.
特性- 8.0 V to 35 V Operation
- 5.1 V +/- 1.0% Trimmed Reference
- 100 Hz to 400 kHz Oscillator Range
- Separate Oscillator Sync Pin
- Adjustable Deadtime Control
- Input Undervoltage Lockout
- Latching PWM to Prevent Multiple Pulses
- Pulse-by-Pulse Shutdown
- Dual Source/Sink Outputs: +/- 400 mA Peak
- Pb-Free Packages are Available*
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封装
数据表 (1)
封装图纸 (2)
| Document Title | Document ID/Size | Revision |
|---|
| PDIP-16 | 648-08 (34.2kB) | V |
| SO-16 WB | 751G-03 (56.7kB) | D |
产品订购型号
| 产品 | 状况 | Compliance | 封装 | MSL* | 容器 | 预算价格 (1千个数量的单价） |
|---|
| SG3525ADWG | Last Shipments | Pb-free
Halide free | SOIC-16W | 751G-03 | 3 | Tube | 47 | |
| SG3525ADWR2G | Active | Pb-free
Halide free | SOIC-16W | 751G-03 | 3 | Tape and Reel | 1000 | $0.8 |
| SG3525ANG | Active | Pb-free
Halide free | PDIP-16 | 648-08 | NA | Tube | 25 | $0.6667 |
订购产品技术参数
| Product | Topology | Phases | Control Mode | VCC Min (V) | VCC Max (V) | fSW Typ (kHz) | tres Typ (ns) |
|---|
| SG3525ADWR2G | Step-Up
Step-Down
Push-Pull
Forward
Flyback
Half-Bridge | 1 | Voltage Mode | 8 | 35 | 400 | 100 |
| SG3525ANG | Push-Pull
Forward
Half-Bridge
Step-Up
Flyback
Step-Down | 1 | Voltage Mode | 8 | 35 | 400 | 100 |
