PJM1563
High Efficiency Dc To Dc Converter Controller
T
he PJM1563
is a monolithic switch requlator
subsystem intended for use as high efficiency DC to
DC converter. and highside-sensed constant current source.
This device contains an internal temperature compensated
reference. comparator, controlled duty cycle oscillator with
an active
current sense circuit, bootstrapped driver
and highcurrent output switch.
It was specifically designed to be incorporated in step-
down and voltage inverting converter applications. Boot -
strapped driver can drive the NPN output switch to
saturation for higher efficiency and less heat dissipation.the
PJM1563CD can deliver 1.5A continuous current without
requiring a heat sink.
These function are contained in an 8 pin dual in-
line package.
DIP -8
SOP -8
P in: 1:SC
2.SE
3.TC
4.GND
5.FB
6.VCC
7.IS
8.DC
FEATURES
•
•
•
•
•
Operation Voltage from 3.0 to 40V Input
Short Circuit Current Limiting
Low Standby Current
Output Switch Current to 2A
1.0A Continuous Output Current.
Output - Voltage Adjustable
High Side Current Sense Capability.
High Efficiency (up to 90%)
Internal
±1%
Reference Voltage.
Bootstrapped Driver.
Frequency Operation from 100Hz to 100KHz
ORDERING INFORMATION
Device
M1563CD
M1563CS
Operating Temperature
-20℃ ~ +85℃℃
Package
DIP-8
SOP-8
•
•
•
•
•
•
BLOCK DIAGRAM
1-5
2002/01.rev.A
PJM1563
High Efficiency Dc To Dc Converter Controller
ABSOLUTE MAXIMUM RATINGS
Characte ristic
Power Supply Voltage
Power Dissipation
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage
Switch Collector
To Emitter Voltage
Driver Collector Voltage
Switch Current
Symbol
V
CC
P
D
V
IR
V
C(SW)
V
E(SW)
V
CE(SW)
V
C(drive)
I
SW
Value
40
1
-0.3 ~ +40
40
40
40
40
2
Unit
V
W
V
V
V
V
V
A
ELECTRICAL CHARACTERISTICS
(V
CC
= 5V, Ta= 0 ~ + 70℃ . unless otherwise specified)
℃
Characte ristic
OSCILLATOR
Charging Current
Discharge Current
Voltage Swing
Discharge To Charge
Current Ratio
Current Limit Sense Voltage
OUTPUT SWITCH
Saturation Voltage
Ⅰ(Note)
Saturation Voltage
Ⅱ(Note)
DC Current Gain (Note)
Collector off State Current (Note)
COMPARATOR
Threshold Voltage
Threshold Voltage
Line Regulation
Input Bias Current
TOTAL DEVICE
Supply Current
Symbol
I
chg
I
dischg
Vosc
I
dischg
I
chg
V
IPK
(SENSE)
V
CE(sat)
Ⅰ
V
CE(sat)
Ⅱ
h
FE
I
C(off)
V
TH
V
IN
I
IB
I
CC
Te st Condition
V
CC
=5 to 40V , Ta=25℃
V
CC
=5 to 40V , Ta=25℃
Ta=25℃
I
PK(SENSE)
=V
CC
, Ta=25℃
I
chg
= I
dischg
,
Min
22
140
5.2
250
Typ
33
200
0.5
6.2
300
Max
42
260
7.5
350
Unit
μA
μA
V
Ta=25℃
mV
Isw=1.0A
Isw=1.0A
Isw=1.0A
℃
V
CE
=40V,
, V
C (driver)
= V
C
(SW)
, V
C (driver)
= 50mA
, V
CE
=5.0V,Ta=25
Ta=25℃
50
1.0
0.45
120
10
1.3
0.7
V
V
100
1.27
5.0
400
4.0
nA
V
mV
nA
mA
1.23
V
CC
= 3 to 40V
V
IN
=0V
V
CC
=5 to 40V , C
T
=0.001μF
I
PK
(sense) =V
CC
, V
PIN
5>Vth
pin 2 =GND
1.25
1.4
40
2.5
Note
: Output switch tests are performed under pulsed conditions to minimize power dissipation
2-5
2002/01.rev.A
PJM1563
High Efficiency Dc To Dc Converter Controller
FIG. 1. STEP-DOWN CONVERTER
Test
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple with Optional Filter
Conditions
V
CC
=15V to 25 V, Io = 500mA
V
CC
= 25 V , Io = 50 to 500mA
V
CC
= 25 V, Io = 500mA
V
CC
= 25 V, R
L
= 0.1Ω
V
CC
= 25 V, Io = 500mA
V
CC
= 25 V, Io = 500mA
Results
12 mV = ±0.12%
10 mV = ±0.03%
120mVp-p
1.1A
82.5%
40mVp-p
FIG.2. VOLTAGE INVERTING CONVERTER
Test
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple with Optional Filter
Conditions
V
CC
=4.5 V to 6.0 V, Io = 100mA
V
CC
= 5.0 V , Io = 10 to 100mA
V
CC
=5.0 V, Io = 100mA
V
CC
= 5.0 V, R
L
= 0.1Ω
V
CC
= 5.0 V, Io = 100mA
V
CC
= 5.0 V, Io = 100mA
Results
3.0 mV = ±0.012%
0.100V = ±0.09%
50mVp-p
910mA
64.5%
70mVp-p
3-5
2002/01.rev.A
PJM1563
High Efficiency Dc To Dc Converter Controller
Table
:
Design Formula
Calculation
ton / toff
(ton+toff) max
C
T
I
C
(switch)
Rsc
L (min)
Co
Step-Down
Vout+V
F
V
CC
(min)-Vsat-Vout
1
fmin
4.8×10
-5
ton
2 I
OUT
(max)
0.3/I
PK
(switch)
( V
CC
(min)-Vsat-Vout ) ton (max)
Ipk (switch)
Ipk (switch) (ton + toff)
8 Vripple (p-p)
Voltage-Inverting
│Vout│
+V
F
V
CC
- Vsat
1
fmin
4.8×10
-5
ton
2 Iout (max) ( ton +toff)
toff
0.3/I
PK
(switch)
(V
CC
(min)-Vsat ) ton (max)
Ipk (switch)
Iout ton
Vripple(p-p)
♦
Vsat = Saturation Voltage of the output switch.
♦
V
F
= Forward Voltage drop of the rectifier.
The following power supply characteristics must be chosen:
♦
V
CC :
Normal input voltage, if this voltage is not constant , then use V
CC
(max) for step-down and V
CC
(min) for
step-up converter.
♦
Vout: Desired Output voltage, Vout=1.25 (1+ R2 / R1 )
♦
Iout : Desired output current.
♦
fmin : Minimum desired output switching frequency at the selected values for V
CC
and Io.
♦
Vripple(p-p): Desired peak-to-peak output ripple voltage. in practice, the calculated value will need to be increased due
to the capacitor′s 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.
4-5
2002/01.rev.A
PJM1563
High Efficiency Dc To Dc 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
4.80
5.00
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
0.189
0.196
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
5-5
2002/01.rev.A
