MC34063A_15 Datasheet, PDF (2/9 Pages) Unisonic Technologies – LINEAR INTEGRATED CIRCUIT

MC34063A
 PIN CONFIGURATION
Switch Collector
1
Switch Emitter
2
Timing Capacitor
3
GND
4
LINEAR INTEGRATED CIRCUIT
8 Driver Collector
7 IPEAK Sense
6
V_CC
5 Comparator Inverting input
 PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
PIN NAME
Switch Collector
Switch Emitter
Timing Capacitor
GND
Comparator Inverting
Input
V_CC
7
I_PEAK Sense
8
Driver Collector
I/O
DESCRIPTION
I Internal Darlington pairs TI collector
O Internal Darlington pairs TI emitter
The value of selected capacitor controls the internal oscillator run rate
I
Inverting input of comparator which can set & initiate the Darlington pairs
output switch
I
Current sense input to monitor the voltage drop across an external
resistor placed in series with V_CC
I Internal Darlington pairs TI collector
 BLOCK DIAGRAM
Switch Collector
Switch Emitter
Timing Capacitor
E
T2
1
T1
2
A
3
S
Q
R
C
Is
CT
OSCILLATOR
GND 4
1.25VREF
COMP.
D
B
8 Drive Collector
7
IPEAK Sense
6 Vcc
5 ^{Comparator Inverting}
Input
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 9
QW-R103-008.K