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H34063AP Datasheet(Fiches technique) 3 Page - Hi-Sincerity Mocroelectronics

Numéro de pièce H34063AP
Description  DC-TO-DC Converter Integrate Circuit Devices
Télécharger  6 Pages
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Fabricant  HSMC [Hi-Sincerity Mocroelectronics]
Site Internet  http://www.hsmc.com.tw
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HI-SINCERITY
MICROELECTRONICS CORP.
Spec. No. : Preliminary Data
Issued Date : 1998.08.01
Revised Date : 1999.06.01
Page No. : 3/6
HSMC Product Specification
Block Diagram
Application Information
Design Formula Table
Calculation
Step-Down
Step-Up
Voltage-Inverting
ton / toff
Vout+VF /
Vin(min) -Vsat-VOut
Vout+VF-Vin(min) /
Vin(min)-Vsat
|Vout| + VF /
Vin-Vsat
(ton + toff) max
1/Fmin
1/Fmin
1/Fmin
CT
4*10
-5ton
4*10
-5ton
4*10
-5ton
IC(switch)
2*Iout(max)
2*Iout(max)(ton+toff/toff)2*Iout(max)(ton+toff/toff)
RS
0.3 / IC(switch)
0.3 / IC(switch)
0.3 / IC(switch)
L(min)
(Vin(min)-Vsat-Vout / IC(switch))
*ton(max)
(Vin(min)-Vsat / IC(switch))
*ton(max)
(Vin(min)-Vsat/ IC(switch))
*ton(max)
CO
IC(switch)*(ton+toff) /
8VRipple(P-P)
Iout*ton / VRipple(P-P)
Iout*ton / VRipple(P-P)
Vsat : Saturation voltage of the output switch.
VF : Forward voltage drop of the ringback rectifier.
The following power supply characteristics must be chosen :
Vin : Nominal input voltage.
Vout : Desired output voltage. |Vout|=1.25*(1+RB/RA)
Iout- Desired output current
Fmin : Minimum desired output switching frequency at the selected values for Vin and Iout.
VRipple(P-P) : Desired peak to peak output ripple voltage in practice, the calculated value will need to be increased
due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept to a low value
since it will directly effect the line and load regulation.
SC
Pin1:1.6A Switch Collector
TC
Pin3:Oscilletor Timing Capacitor
GND
Pin4:Power GND
DRI
Pin8:Driver Collector
IPK
Pin7:Highside Current Sense
Input, VCC-VIPK=300mV
VCC
Pin6:Power Supply Input
FB
Pin5:Feedback Comparator
Inverting Input
SE
Pin2:Darlington Switch Emitter
Q1
Q2
80
QS
R
CT
IPK
Oscillator
Comparator
1.25V
Reference Voltage
+
-




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