SG3524N STMicroelectronics

SG3524 REGULATING PULSE WIDTH MODULATORS COMPLETE PWM POWER CONTROL CIR- CUITRY UNCOMMITTED OUTPUTS FOR SINGLE- ENDED OR PUSH PULL APPLICATIONS LOW STANDBY CURRENT 8mA TYPICAL OPERATION UP TO 300KHz 1% MAXIMUM TEMPERATURE VARIATION OF REFERENCE VOLTAGE DESCRIPTION DIP16 SO16 The SG3524 incorporates on a single monolithic ORDERING NUMBERS: SG3524N (DIP16) chip all the function required for the construction SG3524P (SO16) of regulating power suppies inverters or switching regulators. They can also be used as the control element for high power-output applications. The SG3524 family was designed for switching regu- lators of either polarity, transformer-coupled dc- to-dc converters, transformerless voltage dou- Each device includes an on-ship reference, error blers and polarity converter applications amplifier, programmable oscillator, pulse-steering employing fixed-frequency, pulse-width modula- flip flop, two uncommitted output transistors, a tion techniques. The dual alternating outputs al- high-gain comparator, and current-limiting and lows either single-ended or push-pull applications. shut-down circuitry. BLOCK DIAGRAM 1/9 July 2000 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.SG3524 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V Supply Voltage 40 V IN IC Collector Output Current 100 mA I Reference Output Current 50 mA R I Current Through C Terminal 5 mA T T P Total Power Dissipation at T = 70C1000mW tot amb T Storage Temperature Range 65 to 150 C stg T Operating Ambient Temperature Range: 0 to 70 C op PIN CONNECTION (Top view) THERMAL DATA Symbol Parameter DIP16 SO16 Unit R Thermal Resistance Junction-ambient Max. 80 C/W th j-amb R Thermal Resistance Junction-alumina (*) Max. 50 C/W th j-alumina (*) Thermal resistance junction-alumina with the device soldered on the middle of an alumina supporting substrate measuring 15 x 20mm 0.65mm thickness with infinite heatsink. 2/9