AP34063CN8 International Power Sources, Inc., AP34063CN8 Datasheet - Page 3

• Manufacturer Part Number: AP34063CN8
• Description: Universal DC/DC Converter
• Manufacturer: International Power Sources, Inc.

Universal DC/DC Converter
Anachip Corp.
www.anachip.com.tw
Note: 3.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as
Representative Schematic Diagram
4.If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents ( ≤300mA) and high
*The 100Ω resistor in the emitter of the driver device requires about 7.0mA before the output switch conducts.
Forced ß of output switch :
possible.
driver currents ( ≥ 30mA), it may take up to 2.0 µs for it to come out of saturation.? This condition will shorten the off time at
frequencies ≥ 30kHz, and is magnified at high temperatures. This condition does not occur with a Darlington configuration,
since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive condition is
recommended:
Comparator
Collector
Inverting
Sense
Drive
Input
V
I
CC
pk
8
7
6
5
I
C
driver - 7.0mA*
I
C
Oscillator
output
Ipk
Comparator
(Bottom View)
+
_
CT
3/10
S Q
R
≥ 10
100
Reference
Regulator
1.25V
Q2
Q1
1
3
2
4
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
AP34063
Rev.A5 Feb.10, 2004