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PJ34063 Dc To Converter Controller
T
h e P J 3 4 0 6 3 S eri es i s a m o n l t h i c co n t ro l circuit containing the primary functions required for DC to of an internal circuit, stepDIP -8 SOP -8
DC onverters. These devices consist
duty cycle oscillator with an active current limit specifically designed to be incorporated in step-up,
drive and a high current output switch. This series was down and voltage-inverting applications with a minimum number of external components. temperature compensated reference,comparator,controlled
P in : 1. Switch Collector 3. Timing Capacitor 5. Comparator Inverting Input 7. IP K Sense 2. Switch Emitter 4. Gnd 6. Vcc 8. Driver Collector
FEATURES
* * * Operation from 3 to 40V input Low standby current Current limiting Output switch current to 1.5A Precision 2% reference Output - voltage adjustable Frequency of operation from 100Hz to 100KH
ORDERING INFORMATION
Device PJ34063CD PJ34063CS Operating temperature -20+85 Packagge DIP-8 SOP-8
*
* * *
BLOCK DIAGRAM
1-8
2002/01.rev.A
PJ34063 Dc To Converter Controller
ABSOLUTE MAXIMUM RATINGS Characte ristic
Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage Switch Collector to Emitter Voltage Driver Collector Voltage Drive Collector Current (Note 1) Switch Current Operating Junction Temperature Operating Ambient Temperature Range Storage Temperature Range
Symbol
VCC VIR VC(SW) VE(SW) VCE(SW) VC(drive) IC(drive) Isw TJ TA Tstg
Value
40 -0.3 ~ +40 40 40 40 40 100 1.5 +150 -20 to +85 -65 to +150
Unit
Vdc Vdc Vdc Vdc Vdc Vdc mA A
ELECTRICAL CHARACTERISTICS
(VCC = 5.0V. Ta= Tlow to Thigh. unless otherwise specified)
Characte ristic
OSCILLATOR Frequency Charging Current Discharge Current Discharge To Charge Current Ratio Current Limit Sense Voltage OUTPUT SWITCH(NOTE 2) Saturation Voltage , Darlington Connection Saturation Voltage , Darlington Connection DC Current Gain Collector Off- State Current COMPARATOR Threshold Voltage Threshold Voltage Line Regulation Input Bias Current TOTAL DEVICE Supply Current
Symbol
fosc Ichg Idischg Idischg/ Ichg VIPK(sense) VCE(sat) VCE(sat) hFE IC(off) VTH Regline IIB ICC
Te st Condition
VPIN5=0V, C T =1.0nF , T A=25 VCC=5 to 40V, T A=25 VCC=5 to 40V, T A=25 Pin7 to VCC , T A=25 Ichg = Idischg, T A=25 Isw=1.0A, Pins1,8 connected Isw=1.0A, R PIN8=82 to Vcc, Forced 20 Isw=1.0A, VCE = 5.0V, T A=25 VCE =40V T A=25 VCC = 3 to 40V VIN=0V VCC=5 to 40V, C T =1.0nF, Pin7=Vcc ,VPIN 5>Vth Pin 2 =GND, remaining pins open
Min
24 24 140 5.2 250 50 1.23
Typ
33 35 220 6.5 300 1.0 0.45 75 40 1.25 1.4 -20
Max
42 42 260 7.5 350 1.3 0.7 100 1.27 5.0 -400 4.0
Unit
KHz A A mV V V A
V mV nA mA
-
-
Notes : 1.Maximum package power dissipation limits must be observed.
2.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 2-8 2002/01.rev.A
PJ34063 Dc To Converter Controller
FIGURE 1.OUTPUT SWITCH ON-OFF TIME versus OSCILLATOR TIMING CAPACITOR FIGURE 2.TIMING CAPACITOR WAVEFORM
FIGURE 3.EMITTER FOLLOWER CONFIGURATION OUTPUT SATURATION VOLTAGE versus EMITTER CURRENT
FIGURE 4.COMMON EMITTER CONFIGURATION OUTPUT SWITCH SATURATION VOLTAGE versus COLLECTOR CURRENT
FIGURE 5.CURRENT LIMIT SENSE VOLTAGE versus TEMPERATURE
FIGURE 6.STANDBY SUPPLY CURRENT versus SUPPLY VOLTAGE
3-8
2002/01.rev.A
PJ34063 Dc To Converter Controller
FIGURE 1.STEP-UP CONVERTER
FIGURE 2.EXTERNAL CURRENT BOOST CONNECTIONS FOR Ic PEAK GREATER THAN 1.5A 2a.EXTERNAL NPN SWITCH 2b.EXTERNAL NPN SATURATED SWITCH
4-8
2002/01.rev.A
PJ34063 Dc To Converter Controller
FIGURE 3.STEP-DOWN CONVERTER
FIGURE 4.EXTERNAL CURRENT BOOST CONNECTIONS FOR Ic PEAK GREATER THAN 1.5A 4a.EXTERNAL NPN SWITCH 4b.EXTERNAL NPN SWITCH
5-8
2002/01.rev.A
PJ34063 Dc To Converter Controller
FIGURE 5.VOLTAGE INVERTING CONVERTER
FIGURE 6.EXTERNAL CURRENT BOOST CONNECTIONS FOR Ic PEAK GREATER THAN 1.5A 6a.EXTERNAL NPN SWITCH 6b.EXTERNAL NPN SATURATED SWITCH
6-8
2002/01.rev.A
PJ34063 Dc To Converter Controller
Table
:
Design Formula
Step-Up Vout+VF -Vin(min) VCC(min)-Vsat-Vout Step-Down VOUT +VF VCC(min)-Vsat-Vout Voltage-Inverting Vout +VF VCC + Vsat
Calculation ton toff (ton+toff) max
1 f min
4.0x10-5 ton ton 2Iout(max) toff +1 0.3/IPK(switch) Vin(min) - Vsat Ipk (switch ) = ton(max)
1 f min
4.0x10-5 ton 2Iout(max)
1 f min 4.0x10-5 ton 2Iout(max) ton +1 toff
CT Ipk(switch)
Rsc L (min) Co
0.3/IPK(switch)
Vin (min) - Vsat - Vout Ipk (switch ) = ton(max)
0.3/IPK(switch)
Vin(min) - Vsat Ipk (switch) = ton(max)
Ioutton 9 Vripple( pp)
Ipk ( switch)(ton + toff ) 8Vripple( pp )
Ioutton 9 Vripple( pp)
TERMS AND DEFINITIONS Vsat = Saturation Voltage of the output switch.
VF = Forward Voltage drop of the rectifier. Vin= Normal input voltage Vout: Desied Output voltage, |Vout|=1.25 (1+
Iout : Desired output current. fmin : Minimum desired output switching frequency at the selected values for Vin and.Io.
The following power supply characteristics must be chosen:
R2 ) R1
Vripple(p-p): Desired peak-to-peak output ripple voltage. in practice, the calculated capaitor value will need to be increased due to its equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation.
7-8
2002/01.rev.A
PJ34063 Dc To Converter Controller
DIM A B C D G J K L M
MILLIMETERS MIN MAX 9.07 9.32 6.22 6.48 3.18 4.43 0.35 0.55 2.54BSC 0.29 0.31 3.25 3.35 7.75 8.00 10
INCHES MIN MAX 0.357 0.367 0.245 0.255 0.125 0.135 0.019 0.020 0.10BSC 0.011 0.012 0.128 0.132 0.305 0.315 10
DIM A B C D F G K M P R
MILLIMETERS MIN MAX 8.55 8.75 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27BSC 0.10 0.25 0 7 5.80 6.20 0.25 0.50
INCHES MIN MAX 0.337 0.344 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.05BSC 0.004 0.009 0 7 0.229 0.244 0.010 0.019
8-8
2002/01.rev.A

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