DC-To-DC Converter Control Circuits
Description
DC-To-DC Converter Control Circuits
DEC.
2009
Product Description
The GS34063 Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters.
These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch.
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Features
Operation from 3.
0V to 40V Input Low Standby Current Current Limiting Output Switch Current to 1.
5A Output Voltage Adjustable Frequency Operation to 100kHz Precision 2% Reference
This series was specifically designed to be incorporated in Step-Down and step-Up and Voltage-Inverting applications with a minimum number of external components.
Applications
Battery Powered Applications Laptop/Notebook Computers Power Inverter (+ to -) or (- to +) Medical Instruments Interface Power Supplies Portable Instruments Cellular Phones/Radio
Block Diagram
VCC Switch Collector Driver Collector
6 1 8 2 3 7 CT Ipk
Comparator S Q Q2 Q1 R 100
Switch Emitter Timing Capacitor Ipk Sense
Oscillator
GS34063
1
+
Comparator Inverting Input GND
5 4
-
1.
25V Reference Regulator
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Packages & Pin Assignments GS34063PF(SOP-8)
1 2
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Switch Collector Switch Emitter Timing Capacitor GND
5 6 7 8
Comparator Inverting Input VCC Ipk Sense Driver Collector
3 4
Ordering Information
Device
GS34063PF GS34063SF For additional available fixed voltages, please contact factory.
Package
DIP-8 SOP-8
Marking Information
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GS34063
2
Absolute Maximum Ratings
Symbol
VCC VIR VC(switch) VE(switch) VCE(switch) VC(driver) IC(driver) ISW PD
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Parameter
Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage (VPIN1=40V) Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collector Current (Note 1) Switch Current Power Dissipation TA=25°C Thermal ...
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