MC34063A/B 데이터 시트보기 (PDF) - HTC Korea
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MC34063A/B Datasheet PDF : 12 Pages
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DC-DC Converter Control Circuits
MC34063A/B
PIN CONFIGURATION
1
8
2
7
3
6
4
5
SOP-8
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
Name
Switch Collector
Switch Emitter
Timing Capacitor
GND
Comparator Inverting Input
VCC
IPK Sense
Driver Collector
1
8
2
7
3
6
4
5
DIP-8
SOP-8 / DIP-8 PKG
Function
Internal switch transistor collector
Internal switch transistor emitter
Timing Capacitor to control the switching frequency
Ground pin for all internal circuits
Inverting input pin for internal comparator
Voltage supply
Peak Current Sense Input by monitoring the voltage drop across an
external I sense resistor to limit the peak current through the switch
Voltage driver collector
BLOCK DIAGRAM
Jan. 2011 - Rev. 1.0
Driver
Collector
8
SQ
R
Q2
1
Switch
Collector
Q1
IPK Sense 7
VCC 6
Comparator
Inverting
5
Input
IPK
Oscillator
Comparator
+
-
1.25V
Reference
Regulator
2
Switch
Emitter
3
Timing
Capacitor
4 GND
-3 -
HTC
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