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SG3525A: PWM Controller

Datasheet: Pulse Width Modulator Control Circuit
Rev. 5 (142.0kB)
Product Overview
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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.
Features
 
  • 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*
Applications
  • Half Bridge
  • Push-Pull
Technical Documentation & Design Resources
Data Sheets (1) FAQ (1)
Package Drawings (2)  
Availability & Samples
Specifications
Case Outlines
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
SG3525ADWG Obsolete 
Pb-free
Halide free
SG3525A SOIC-16W 751G-03 3 260 Tube 47  
SG3525ADWR2G Active
Pb-free
Halide free
SG3525A SOIC-16W 751G-03 3 260 Tape and Reel 1000 $0.4537
SG3525ANG Active
Pb-free
Halide free
SG3525A PDIP-16 648-08 NA Tube 25 $0.4147
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <1K
Market Leadtime (weeks) : Contact Factory
FutureElectronics   (2020-08-19 00:00) : >1K
PandS   (2020-09-14 00:00) : <1K

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Phases
Control Mode
VCC Min (V)
VCC Max (V)
fSW Typ (kHz)
Package Type
SG3525ADWR2G  
 $0.4537 
Pb
H
 Active   
Flyback
Forward
Half-Bridge
Push-Pull
Step-Down
Step-Up
1
Voltage Mode
8
35
400
SOIC-16W
SG3525ANG  
 $0.4147 
Pb
H
 Active   
Flyback
Forward
Half-Bridge
Push-Pull
Step-Down
Step-Up
1
Voltage Mode
8
35
400
PDIP-16
Case Outlines
648-08    751G-03   
Packages
SG3525A: PWM Controller
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