DESCRIPTION
The SG1526B is a high-performance pulse width modulator for switching power supplies which offers improved functional and electrical characteristics over the industry-standard SG1526. A direct pin-for-pin replacement for the earlier device with all its features, it incorporates the following enhancements: a bandgap reference circuit for improved regulation and drift characteristics, improved undervoltage lockout, lower temperature coefficients on oscillator frequency and current-sense threshold, tighter tolerance on softstart time, much faster SHUTDOWN response, improved double-pulse supperession logic for higher speed operation, and an improved output driver design with low shoot-through current, and faster rise and fall times. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformer-less and transformer-coupled. The SG1526B is specified for operation over the full military ambient temperature range of -55°C to 150°C. The SG2526B is characterized for the industrial range of -25°C to 150°C, and the SG3526B is designed for the commercial range of 0°C to 125°C.
FEATURES
⢠8 to 35 volt operation
⢠5V low drift 1% bandgap reference
⢠1Hz to 500KHz oscillator range
⢠Dual 100mA source/sink
⢠Digital current limiting
⢠Double pulse suppression
⢠Programmable deadtime
⢠Improved undervoltage lockout
⢠Single pulse metering
⢠Programmable soft-start
⢠Wide current limit common mode range
⢠TTL/CMOS compatible logic ports
⢠Symmetry correction capability
⢠Guaranteed 6 unit synchronization
⢠Shoot thru currents less than 100mA
⢠Improved shutdown delay
⢠Improved rise and fall time
HIGH RELIABILITY FEATURES - SG1526B
⦠Available to MIL-STD-883
⦠MIL-M38510/12603BVA - JAN1526BJ
⦠Radiation data available
⦠LMI level "S" processing available
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