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SG1524BJ

PWM Controller Voltage Mode +/-1% Ref - pulse width modulator 55 °C to 125 °C

Status: In Production

Features:

  • 7V to 40V Operation
  • 5V Reference Trimmed to 1%
  • 100Hz to 400kHz Oscillator Range
  • Excellent External Sync Capability
  • Dual 100 mA Output Transistors
  • Wide Current Limit Common Mode Range DC-Coupled Toggle Flip-flop
  • PWM Data Latch -Undervoltage Lockout
  • Full Double-pulse Suppression Logic
  • Full Double-pulse Suppression Logic
  • 60V Output Collectors
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Device Overview

Summary

The SG1524B is a pulse width modulator for switching power supplies that features improved performance over industry standards like the SG1524. A direct pin-for-pin replacement for the earlier device, it combines advanced processing techniques and circuit design to provide improved reference accuracy, and extended common mode range at the error amplifier and current limit inputs. A DC-coupled flip-flop eliminates triggering and glitch problems, and a PWM data latch prevents edge oscillations. The circuit incorporates true digital shutdown for high speed response, while an under voltage lockout circuit prevents spurious outputs when the supply voltage is too low for stable operation. Full double-pulse suppression logic insures alternating output pulses when the Shutdown pin is used for pulse-by-pulse current limiting. The SG1524B is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG2524B is characterized for the industrial range of -25°C to 85°C, and the SG3524B is designed for the commercial range of 0°C to 70°C.

Additional Features
    • 7V to 40V Operation
    • 5V Reference Trimmed to 1%
    • 100Hz to 400kHz Oscillator Range
    • Excellent External Sync Capability
    • Dual 100 mA Output Transistors
    • Wide Current Limit Common Mode Range DC-Coupled Toggle Flip-flop
    • PWM Data Latch -Undervoltage Lockout
    • Full Double-pulse Suppression Logic
    • Full Double-pulse Suppression Logic
    • 60V Output Collectors
Parametrics
Name
Value
Regulator Type
HI Rel Switching Regulators
Configuration
Voltage Mode PWMs
Supported Topology
Push-pull, Single ended
Supported Output
2
Minimum Input Voltage (V)
7
Maximum Input Voltage (V)
40
Output Current (mA) Max
100
Maximum Frequency (kHz)
600
Operating Temperature Range (°C)
-55 to 125
Vref (V)
5
Duty Cycle Max (%)
49
UVLO
Yes
Current Limit
Yes
Operating Temp Range
to
Quiescent Current (mA) typ
5

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