For assistance or to order, call
(800) 531-5782
54
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902 http://www.powertrends.com
•
Single Device: 5A Output
•
Input Voltage Range: 9V to 28V
•
Adjustable Output Voltage
•
80% Efficiency
•
Remote Sense Capability
•
Standby Function
The PT6650 series is a new addi-
tion to Power Trends’ line of 24V bus
Integrated Switching Regulators
5 AMP 24V INPUT
INTEGRATED SWITCHING REGULATOR
P T 6 6 5 0
S e r i e s
Standard Application
C
1
= Required 100µF electrolytic
C
2
= Required 330µF electrolytic
Q
1
= NFET-or Open Collector Gate
PT6650
4,5,6
7,8,9,10
11,12,13
V
IN
COM
COM
V
OUT
C
2
+
C
1
+
1
3
STBY
Q
1
REMOTE SENSE
LOAD
Ordering Information
PT6651
¨ = +3.3 Volts
PT6652
¨ = +2.5 Volts
PT6653
¨ = +5.0 Volts
PT6654
¨ = +9.0 Volts
PT6655
¨ = +15.0 Volts
PT6656
¨ = +12.0 Volts
PT Series Suffix
(PT1234
X
)
Case/Pin
Heat
Heat Spreader
Configuration
Spreader with Side Tabs
Vertical Through-Hole
P
R
Horizontal Through-Hole
D
G
Horizontal Surface Mount
E
B
1
Remote Sense
2
Do Not Connect
3
STBY*- Standby
4
V
in
5
V
in
6
V
in
7
GND
8
GND
9
GND
10
GND
11
V
out
12
V
out
13
V
out
14
V
out
Adjust
Pin-Out Information
(ISRs). Designed for general purpose
industrial applications requiring as
much as 5A of output current, the
PT6650 is packaged in a 14-Pin SIP
(Single In-line Package) and is available
in a surface-mount configuration.
Only two external capacitors are
required for proper operation. Please
note that this product does not include
short circuit protection.
Note: Back surface
of product is
conducting metal
54
Pkg Style 400
Specifications
Characteristics
PT6650 SERIES
(T
a
= 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
I
o
T
a
= 60°C, 200 LFM, pkg P
0.1*
—
5.0**
A
T
a
= 25°C, natural convection
0.1*
—
5.0**
A
Input Voltage Range
V
in
0.1A
≤
I
o
≤
5.0A
V
o
< +6V
+9V
—
+28V
V
V
o
> +6V
V
o
+3
—
+28V
V
Output Voltage Tolerance
∆
V
o
Over V
in
range
T
a
= -40°C to +65°C
V
o
-0.1
—
V
o
+0.1
V
Output Voltage Adjust Range
V
oadj
Pin 14 to V
o
or ground
V
o
= +3.3V
2.2
—
4.7
V
o
= +2.5V
1.8
—
4.3
V
o
= +5.0V
3.0
—
6.5
V
V
o
= +9.0V
6.0
—
10.2
V
o
= +12V
9.0
—
13.6
V
o
= +15V
10.0
—
17.0
Line Regulation
Reg
line
+9V
≤
V
in
≤
+28V, I
o
= 5.0A
—
±0.5
±1.0
%V
o
Load Regulation
Reg
load
V
in
= +24V, 0.1
≤
I
o
≤
5.0A
—
±0.5
±1.0
%V
o
V
o
Ripple/Noise
V
n
V
in
= +24V, I
o
= 5.0A V
o
< +6V
—
50
—
mVpp
V
o
> +6V
1.0
%V
o
Transient Response
t
tr
I
o
step between 2.5A and 5.0A
—
100
—
µSec
with C
2
= 330µF
V
os
V
o
over/undershoot
—
100
—
mV
Efficiency
η
V
in
= +24V, I
o
= 0.5x I
o max
V
o
= +3.3V
—
81
—
%
V
o
= +2.5V
—
76
—
%
V
o
= +5.0V
—
85
—
%
V
in
= +24V, I
o
= I
o max
V
o
= +3.3V
—
80
—
%
V
o
= +2.5V
—
75
—
%
V
o
= +5.0V
—
84
—
%
Switching Frequency
ƒ
o
9V
≤
V
in
≤
28V
500
550
600
kHz
Over
I
o
range
Recommended Operating
T
a
Free Air Convection (40-60 LFM)
-40
—
+65
°C
Temperature Range
Over V
in
and
I
o
ranges with heat tab
Storage Temperature
T
s
—
-40
—
+125
°C
Mechanical Shock
—
Per Mil-STD-883D, Method 2002.3
—
500
—
G’s
Mechanical Vibration
—
Per Mil-STD-883D, Method 2007.2,
—
7.5
—
G’s
20-2000 Hz, soldered in a PC board
Weight
—
—
—
14
—
grams
*
ISR will operate down to no load with reduced specifications. ** See SOA curves.
Note: The PT6650 Series requires a 330µF(output) and 100µF(input) electrolytic capacitors for proper operation in all applications.
Revised 2/5/99
Application Notes
Mechanical Outline
Product Selector Guide
For assistance or to order, call
(800) 531-5782
55
24V Bus Products
DA
T
A
SHEETS
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902 http://www.powertrends.com
C H A R A C T E R I S T I C D A T A
55
24V Bus Products
DA
T
A
SHEETS
P T 6 6 5 0
S e r i e s
Efficiency vs Output Current
Ripple vs Output Current
Power Dissipation vs Output Current
Efficiency (%)
Output Current (A)
Ripple (mVpp)
Output Current (A)
Pd (Watts)
Output Current (A)
PT6650 Series @V
PT6650 Series @V
PT6650 Series @V
PT6650 Series @V
PT6650 Series @Vin=+24V
in=+24V
in=+24V
in=+24V
in=+24V
Safe Operating Area Curves @V
Safe Operating Area Curves @V
Safe Operating Area Curves @V
Safe Operating Area Curves @V
Safe Operating Area Curves @Vin=+24V
in=+24V
in=+24V
in=+24V
in=+24V
40
50
60
70
80
90
100
0
1
2
3
4
5
PT6651
PT6652
PT6653
PT6654
PT6655
PT6656
0
20
40
60
80
100
120
0
1
2
3
4
5
PT6651
PT6652
PT6653
PT6654
PT6655
PT6656
0
1
2
3
4
5
0
1
2
3
4
5
PT6651
PT6652
PT6653
PT6654
PT6655
PT6656
PT6651P, 3.3V
Ambient Temperature (°C)
Output Current (A)
Airflow
Recommended Maximum
Operating Temperature
Ambient Temperature (°C)
Output Current (A)
Airflow
Recommended Maximum
Operating Temperature
PT6652P, 2.5V
Ambient Temperature (°C)
Output Current (A)
Airflow
Recommended Maximum
Operating Temperature
PT6653P, 5.0V
20
30
40
50
60
70
80
90
0
1
2
3
4
5
6
Nat conv
60LFM
120LFM
200LFM
20
30
40
50
60
70
80
90
0
1
2
3
4
5
6
Nat conv
60LFM
120LFM
200LFM
20
30
40
50
60
70
80
90
0
1
2
3
4
5
6
Nat conv
60LFM
120LFM
200LFM
For assistance or to order, call
(800) 531-5782
3
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902 http://www.powertrends.com
A p p l i c a t i o n
N o t e s
PT6650 Series
More Application Notes
Adjusting the Output Voltage of the
PT6650 5Amp 24V Bus Converter Series
The output voltage of the Power Trends PT6650 Series ISRs
may be adjusted higher or lower than the factory trimmed pre-
set voltage with the addition of a single external resistor. Table 1
accordingly gives the allowable adjustment range for each model
in the series as V
a
(min) and V
a
(max).
Adjust Up:
An increase in the output voltage is obtained by
adding a resistor R2, between pin 14 (V
o
adjust) and pins 7-10
(GND).
Adjust Down:
Add a resistor
(R1)
, between pin 14 (V
o
adjust)
and pins 11-13 (V
out
).
Refer to Figure 1 and Table 2 for both the placement and value
of the required resistor, either
(R1)
or R2 as appropriate.
Notes:
1. Use only a single 1% resistorin either the
(R1)
or R2 loca-
tion. Place the resistor as close to the ISR as possible.
2. Never connect capacitors from V
o
adjust to either GND,
V
out
, or the Remote Sense pin. Any capacitance added to
the V
o
adjust pin will affect the stability of the ISR.
3. If the Remote Sense feature is being used, connecting the
resistor
(R1)
between pin 14 (V
o
adjust) and pin 1 (Remote
Sense) can benefit load regulation.
4. The minimum input voltage required by the part is V
out
+ 3,
or 9V, whichever is higher.
5. For output voltages above 12.5Vdc, the maximum output
current must be limited to 4Adc.
The values of
(R1)
[adjust down], and R2 [adjust up], can
also be calculated using the following formulae.
R
o
(V
o
– 1.25)(V
a
– 1.25)
(R1)
=
1.25 (V
o
– V
a
)
– R
s
k
Ω
R
o
(V
o
– 1.25)
– R
s
k
Ω
R2
=
V
a
- V
o
Where: V
o
= Original output voltage
V
a
= Adjusted output voltage
R
o
= The resistance value in Table 1
R
s
= The series resistance from Table 1
Figure 1
Table 1
PT6650 ADJUSTMENT AND FORMULA PARAMETERS
Series Pt #
PT6652
PT6651
PT6653
PT6654
PT6656
PT6655
Vo (nom)
2.5V
3.3V
5.0V
9.0V
12.0V
15.0V
Va (min)
1.8V
2.2V
3.0V
6.0V
9.0V
10.0V
Va (max)
4.3V
4.7V
6.5V
10.2V
13.6V
17.0V
Ro (k
Ω
Ω
Ω
Ω
Ω
)
4.99
4.22
2.49
2.0
2.0
2.0
Rs (k
Ω
Ω
Ω
Ω
Ω
)
2.49
4.99
4.99
12.7
12.7
12.7
C
in
100
µ
F
+
C
out
330
µ
F
+
(R1)
Adj Down
R 2
Adjust Up
Vo
C O M
C O M
Vin
L
O
A
D
PT6650
1 1 , 1 2 , 1 3
1 4
7,8,9,10
4,5,6
Vin
V o
G N D
Vo(adj)
S T B Y
3
V s e n s e
1
For assistance or to order, call
(800) 531-5782
4
A p p l i c a t i o n
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902 http://www.powertrends.com
N o t e s
PT6650 Series
Table 2
PT6650 ADJUSTMENT RESISTOR VALUES
Series Pt #
PT6652
PT6651
PT6653
Series Pt #
PT6654
PT6656
PT6655
Current
5Adc
5Adc
5Adc
Current
5Adc
5Adc
4Adc
V
o
(nom)
2.5Vdc
3.3Vdc
5.0Vdc
V
o
(nom)
9.0Vdc
12.0Vdc
15.0Vdc
V
a
(req’d)
V
a
(req’d)
1.8
(1.4)k
Ω
6.0
(6.9)k
Ω
1.9
(2.9)k
Ω
6.2
(9.2)k
Ω
2.0
(5.0)k
Ω
6.4
(11.9)k
Ω
2.1
(8.1)k
Ω
6.6
(14.0)k
Ω
2.2
(13.3)k
Ω
(1.0)k
Ω
6.8
(18.6)k
Ω
2.3
(23.7)k
Ω
(2.3)k
Ω
7.0
(23.0)k
Ω
2.4
(54.9)k
Ω
(3.9)k
Ω
7.2
(28.3)k
Ω
2.5
(5.8)k
Ω
7.4
(35.0)k
Ω
2.6
59.9k
Ω
(8.4)k
Ω
7.6
(43.5)k
Ω
2.7
28.7k
Ω
(11.7)k
Ω
7.8
(55.0)k
Ω
2.8
18.3k
Ω
(16.5)k
Ω
8.0
(71.0)k
Ω
2.9
13.1k
Ω
(23.6)k
Ω
8.2
(95.0)k
Ω
3.0
10.0k
Ω
(35.4)k
Ω
(1.6)k
Ω
8.4
(135.0)k
Ω
3.1
7.9k
Ω
(59.0)k
Ω
(2.3)k
Ω
8.6
(215.0)k
Ω
3.2
6.4k
Ω
(130.0)k
Ω
(3.1)k
Ω
8.8
(455.0)k
Ω
3.3
5.3k
Ω
(4.0)k
Ω
9.0
(31.7)k
Ω
3.4
4.4k
Ω
81.5k
Ω
(5.1)k
Ω
9.2
64.8k
Ω
(36.1)k
Ω
3.5
3.8k
Ω
38.3k
Ω
(6.2)k
Ω
9.4
26.1k
Ω
(41.2)k
Ω
3.6
3.2k
Ω
23.8k
Ω
(7.6)k
Ω
9.6
13.1k
Ω
(47.1)k
Ω
3.7
2.7k
Ω
16.6k
Ω
(9.1)k
Ω
9.8
6.7k
Ω
(54.1)k
Ω
3.8
2.3k
Ω
12.3k
Ω
(10.9)k
Ω
10.0
2.8k
Ω
(62.6)k
Ω
(25.8)k
Ω
3.9
2.0k
Ω
9.4k
Ω
(13.0)k
Ω
10.2
0.2k
Ω
(72.8)k
Ω
(28.3)k
Ω
4.0
1.7k
Ω
7.4k
Ω
(15.6)k
Ω
10.4
(85.7)k
Ω
(31.1)k
Ω
4.1
1.4k
Ω
5.8k
Ω
(18.7)k
Ω
10.6
(102.0)k
Ω
(34.1)k
Ω
4.2
1.2k
Ω
4.6k
Ω
(22.6)k
Ω
10.8
(124.0)k
Ω
(37.3)k
Ω
4.3
1.0k
Ω
3.7k
Ω
(27.6)k
Ω
11.0
(155.0)k
Ω
(40.9)k
Ω
4.4
2.9k
Ω
(34.2)k
Ω
11.2
(201.0)k
Ω
(44.9)k
Ω
4.5
2.2k
Ω
(43.6)k
Ω
11.4
(278.0)k
Ω
(49.3)k
Ω
4.6
1.7k
Ω
(57.6)k
Ω
11.6
(432.0)k
Ω
(54.3)k
Ω
4.7
1.2k
Ω
(80.9)k
Ω
11.8
(895.0)k
Ω
(59.8)k
Ω
4.8
(128.0)k
Ω
12.0
(66.1)k
Ω
4.9
(268.0)k
Ω
12.2
94.8k
Ω
(73.3)k
Ω
5.0
12.4
41.1k
Ω
(81.6)k
Ω
5.1
88.4k
Ω
12.6
23.1k
Ω
(91.3)k
Ω
5.2
41.7k
Ω
12.8
14.2k
Ω
(103.0)k
Ω