|
|
Part: SG3524N
Category:
Power Management
-> PWM Controllers
-> Voltage Mode PWM Controllers
Description: Regulating Pulse Width Modulators
Company: ST Microelectronics, Inc.
Datasheet: Download SG3524N datasheet File size : 1010 kB
Request For quote: Find where to buy SG3524N
Datasheet text preview:
SG2524 SG3524
REGULATING PULSE WIDTH MODULATORS
COMPLETE PWM POWER CONTROL CIRCUITRY UNCOMMITTED OUTPUTS FOR SINGLEENDED OR PUSH PULL APPLICATIONS LOW STANDBY CURRENT 8mA TYPICAL OPERATION UP TO 300KHz 1% MAXIMUM TEMPERATURE VARIATION OF REFERENCE VOLTAGE
D IP16 SO16
DESCRIPTION The SG2524 , and SG3524 incorporate on a single monolithic chip all the function required for the construction 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 regulators of either polarity, transformer-coupled dc-to-dc converters, transformerless voltage doublers and polarity converter applications employing fixed-frequenc y, pulse-width modulation technique s. The dual alternating outputs allows either single-ended or push-pull ap pliBLOCK DIAGRAM
ORDERIN G NUMBERS: SG2524N (DIP16) SG3524N (DIP16) SG2524P ( SO16) SG3524P ( SO16)
cations. Each device includes an on-ship reference, error amplifier, programmable oscillator, pulse-steering flip flop, two uncommitted output transistors, a high-gain comparator, and currentlimiting and shut-down circuitry.
December 1995
1/9
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
SG2524 - SG3524
ABSOLUTE MAXIMUM RATINGS
Symbol VIN IC IR IT Ptot Tstg Top Supply Voltage Collector Output Current Reference Output Current Current T hrough C T Terminal Total Power D issipation at Tamb = 70°C Storage Tem perature Range Operating Ambient Temperature Range: SG2524 SG3 524 Parameter Value 40 100 50 5 1000 65 to 150 25 to 85 0 to 70 Unit V mA mA mA mW °C °C °C
PIN CONNECTION (Top view)
THERMAL DATA
Symbol Rth j-amb R th j-alumina Parameter Thermal Resistance Junction-ambient Thermal Resistance Junction-alumina (*) Max. Max. DIP16 80 SO16 50 Unit °C/W °C/W
(*) 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
SG2524 - SG3524
ELECTRICAL CHARACTERISTICS (unless otherwise stated, these specifications apply fo r Tj = -25 to +85°C for the SG2524, and 0 to 70°C for the SG3524, VIN = 20V, and f = 20KHz).
Symbo l Parameter Test Co ndition SG2524 Min. 4.8 VIN = 8 to 40V IL = 0 to 20mA f = 120Hz, Tj = 25°C VREF = 0, Tj = 25°C Over Operating Temperature range Tj = 125°C, t = 1000Hrs C T = 0.001µF, R T = 2K R T and C T Constant VIN = 8 to 40V, Tj = 25°C Over Operating Temperature R ange Pin 3, Tj = 25°C C T = 0.01µF, Tj = 25°C VCM = 2.5V 72 Tj = 25°C Tj = 25°C AV = 0dB, Tj = 25°C Tj = 25°C % Each Output On Zero Duty-cycle Maximum Duty-cycle Ib Input Bias Current Sense Voltage Pin 9 = 2V with Error Amp. Set for Max. Out. Tj = 25°C 190 CURRENT LIMITIN G SECTION 200 210 180 200 220 mV 0.5 0 1 3.5 1 1.8 70 3 3.8 45 0.5 0 1 3.5 1 3.5 0.5 0.5 2 80 3.4 5 10 60 1.8 70 3 3.8 45 Typ. 5 10 20 66 100 0.3 20 300 5 1 2 3.5 0.5 2 2 80 3.4 10 10 1 Max. 5.2 20 50 Min. 4.6 SG3524 Typ. 5 10 20 66 100 0.3 20 300 5 1 2 1 M ax. 5.4 30 50 Unit
REFERE NCE SECTION VREF VREF VREF Output Voltage Line Regulation Load R egulation Ripple Rejection Short C ircuit Current Limit VREF/T VREF fMAX Temperature Stability Long T erm Stability Maximum Frequency Initial Accuracy Voltage Stability f/T Temperature Stability Output Am plitude Output Pulse Width ERROR AMPLIFIER SECTION VOS Ib GV CM V CM R B VO Input Offset Voltage Input Bias Current Open Loop Voltage Gain Common Mode Voltage Common Mode Rejection Small Signal Bandwidth Output Voltage Duty-cycle VIT Input T hreshold mV µA dB V dB MHz V % V V µA V mV mV dB mA % mV KHz % % % V µs
OSCILL ATOR SECTIO N
COMPARATOR SECT ION
Sense Voltage T.C. CM V Common Mode Voltage Collector-emitter Voltage Collector Leackage Curr. Saturation Voltage Emitter Output Voltage tr tf Iq (*) Rise Time Fall Time Total Standby Current VCE = 40V IC = 50mA VIN = 20V R C = 2K, T j = 25°C R C = 2K, T j = 25°C VIN = 40V 17 1 40 OUTPUT SECTION(each output)
0.2 1 1 40 0.1 1 18 0.2 0.1 8 10 50 2 17
0.2 1
mV/°C
V 0.1 1 18 0.2 0.1 8 10 50 2 µA V V µs µs mA
(*) Excluding oscillator charging current, error and current limi t dividers, and with outputs open.
3/9
Others parts begin by sg
SG-1 SG-2 SG-3 SG-4 SG-5 SG-6 SG-7 SG-8 SG-9 SG-10 SG-11
|
|
|
