PJ34063
DC-To-DC Converter Controller
1-8
2002.ver.A
he PJ34063 Series is a monlthic control circuit
containing the primary functions required for DC to
DC onverters. These devices consist of an internal
duty cycle oscillator with an active current limit
circuit, drive and a high current output switch. This
series was specifically designed to be incorporated in
step-up, step-down and voltage-inverting applications
with a minimum number of external components.
temperature compensated reference,comparator,controlled.
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 100KHz
T
Device Operating
temperature
(Ambient)
Packagge
PJ34063CD DIP-8
PJ34063CS
-20+85
SOP-8
DIP-8
SOP-8
FEATURES
BLOCK DIAGRAM
Pin : 1. Switch Collector
2. Switch Emitter
3. Timing Capacitor
4. Gnd
5. Comparator Inverting Input 6. Vcc
7. IPK Sense
8. Driver Collector
ORDERING INFORMATION
PJ34063
DC-To-DC Converter Controller
2-8
2002.ver.A
Characteristic Symbol
Value Unit
Power Supply Voltage
V
CC
40 Vdc
Comparator Input Voltage Range
V
IR
-0.3 ~ +40
Vdc
Switch Collector Voltage
V
C(SW)
40 Vdc
Switch Emitter Voltage
V
E(SW)
40 Vdc
Switch Collector to Emitter Voltage
V
CE(SW)
40 Vdc
Driver Collector Voltage
V
C(drive)
40 Vdc
Drive Collector Current (Note 1)
I
C(drive)
100 mA
Switch Current
Isw
1.5
A
Operating Junction Temperature
T
J
0 to +125
Operating Ambient Temperature Range
T
A
-20 to +85
Storage Temperature Range
Tstg
-25 to +150
(V
CC
= 5.0V. Ta= Tlow to Thigh. unless otherwise specified)
Characteristic
Symbol
Test Condition
Min
Typ
Max
Unit
OSCILLATOR
Frequency fosc
V
PIN5
=0V, C
T
=1.0nF , T
A
=25 24 33 42 KHz
Charging Current
I
chg
V
CC
=5 to 40V, T
A
=25 24
35
42
A
Discharge Current
I
dischg
V
CC
=5 to 40V, T
A
=25
140 220
260
A
Discharge To Charge Current
Ratio
I
dischg/
I
chg
Pin7 to V
CC
, T
A
=25 5.2
6.5
7.5
-
Current Limit Sense Voltage
V
IPK(sense)
I
chg
= I
dischg,
T
A
=25 250
300
350
mV
OUTPUT SWITCH(NOTE 2)
Saturation Voltage , Darlington
Connection
V
CE(sat)
Isw=1.0A, Pins1,8 connected
-
1.0
1.3
V
Saturation Voltage , Darlington
Connection
V
CE(sat)
Isw=1.0A, R
PIN8
=82 to Vcc,
Forced 20
- 0.45 0.7 V
DC Current Gain
h
FE
Isw=1.0A, V
CE
= 5.0V, T
A
=25
50 75 -
-
Collector Off- State Current
I
C(off)
V
CE
=40V -
40
100
A
COMPARATOR
Threshold Voltage
V
TH
T
A
=25
1.23
1.25
1.27
V
Threshold Voltage
Line Regulation
Regline
V
CC
= 3 to 40V
1.4
5.0
mV
Input Bias Current
I
IB
V
IN
=0V
-20
-400
nA
TOTAL DEVICE
Supply Current
I
CC
V
CC
=5 to 40V, C
T
=1.0nF,
Pin7=Vcc ,V
PIN
5>Vth
Pin 2 =GND, remaining pins open
- - 4.0 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.
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
PJ34063
DC-To-DC Converter Controller
3-8
2002.ver.A
FIGURE 1.OUTPUT SWITCH ON-OFF TIME versus
OSCILLATOR TIMING CAPACITOR
FIGURE 3.EMITTER FOLLOWER CONFIGURATION
OUTPUT SATURATION VOLTAGE versus EMITTER
CURRENT
FIGURE 5.CURRENT LIMIT SENSE VOLTAGE versus
TEMPERATURE
FIGURE 2.TIMING CAPACITOR WAVEFORM
FIGURE 4.COMMON EMITTER CONFIGURATION
OUTPUT SWITCH SATURATION VOLTAGE versus
COLLECTOR CURRENT
FIGURE 6.STANDBY SUPPLY CURRENT versus
SUPPLY VOLTAGE
PJ34063
DC-To-DC Converter Controller
4-8
2002.ver.A
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
PJ34063
DC-To-DC Converter Controller
5-8
2002.ver.A
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
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