TI PT6626

(800) 531-5782
For assistance or to order, call
PT6620
Revised 2/5/99
Series
Application Notes
Mechanical Outline
Product Selector Guide
6 AMP 12V INPUT
INTEGRATED SWITCHING REGULATOR
•
•
•
•
•
•
•
Single Device: 6A Output
Input Voltage Range: 9V to 14V
Adjustable Output Voltage
83% Efficiency
Remote Sense Capability
Standby Function
Over-Temperature Protection
The PT6620 series is a new addition
to Power Trends’ line of 12V bus Integrated Switching Regulators (ISRs).
Pin-Out Information
Pin
Standard Application
REMOTE SENSE
1
V IN
4,5,6
PT6620
VOUT
11,12,13
3
C1
7,8,9,10
+
STBY
C2
+
LOAD
Q1
COM
COM
C1 = Required 330µF electrolytic
C2 = Required 330µF electrolytic
Q1 = NFET-or Open Collector Gate
Specifications
Function
1
Remote Sense
2
Do Not Connect
3
STBY*- Standby
4
Vin
5
Vin
6
Vin
7
GND
8
GND
9
GND
10
GND
11
Vout
12
Vout
13
Vout
14
Vout Adjust
Designed for stand-alone operation in
applications requiring as much as 6A of
output current, the PT6620 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.
Ordering Information PT Series Suffix (PT1234X)
PT6621¨
PT6622¨
PT6623¨
PT6624¨
PT6625¨
PT6626¨
= +3.3 Volts
= +1.5 Volts
= +2.5 Volts
= +3.6 Volts
= +5.0 Volts
= +9.0 Volts
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
Pkg Style 400
Note: Back surface
of product is
conducting metal
PT6620 SERIES
Characteristics
(Ta = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Ta = 60°C, 200 LFM, pkg P
Ta = 25°C, natural convection
0.1*
0.1*
—
—
6.0**
6.5**
A
A
Input Voltage Range
Vin
0.1A ≤ Io ≤ 6.0A
+9
Vo+3
—
—
+14
+14
V
V
Output Voltage Tolerance
Ta = 0 to 60°C
∆Vo
Vin = +12V, Io = 6.0A
Vo-0.1
—
Vo+0.1
V
Output Voltage Adjust Range
Voadj
Pin 14 to Vo or ground
2.3
1.4
1.9
2.5
2.9
5.2
—
—
—
—
—
—
4.5
2.7
3.7
4.8
6.5
10.0
V o ≤ +5V
+6V≤Vo≤+9V
Vo
Vo
Vo
Vo
Vo
Vo
= +3.3V
= +1.5V
= +2.5V
= +3.6V
= +5.0V
= +9.0V
Line Regulation
Regline
+9V≤V in≤+14V, Io = 6.0A
—
±0.5
±1.0
Load Regulation
Regload
Vin = +12V, 0.1≤ Io≤6.0A
—
±0.5
±1.0
%Vo
Vo Ripple/Noise
Vn
Vin = +12V, Io = 6.0A
—
—
50
1.0
—
—
mVpp
%Vo
Transient Response
with C2 = 330µF
t tr
Vos
Io step between 3.0A and 6.0A
Vo over/undershoot
—
—
100
150
—
—
µSec
mV
Vin = +12V, Io = 3.0A
Vo= +3.3/3.6V
Vo = +1.5V
Vo = +2.5V
Vo = +5.0V
Vo = +9.0V
—
—
—
—
—
84
68
76
86
93
—
—
—
—
—
%
%
%
%
%
Vin = +12V, Io =6.0A
Vo= +3.3/3.6V
Vo = +1.5V
Vo = +2.5V
Vo = +5.0V
Vo = +9.0V
—
—
—
—
—
83
66
75
85
92
—
—
—
—
—
%
%
%
%
%
Efficiency
η
Vo < +6V
Vo > +6V
* ISR will operate down to no load with reduced specifications.
** See SOA curves - Output power is limited to 30W maximum.
Note: The PT6620 Series requires a 330µF(output) and 330µF(input) electrolytic capacitors for proper operation in all applications.
48
V
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
%Vo
For assistance or to order, call
(800) 531-5782
PT6620
Series
Specifications (continued)
PT6620 SERIES
Conditions
Min
Typ
Max
Units
Switching Frequency
ƒo
9V ≤ Vin ≤ 14V
0.1A ≤ Io ≤ 6.0A
500
500
650
550
775
600
kHz
kHz
Recommended Operating
Temperature Range
Ta
Free Air Convection (40-60 LFM)
Over Vin and Io ranges with heat tab
-40
—
+65**
°C
Absolute Maximum
Operating Temperature Range
Ta
-40
—
+85
°C
°C
PT6622
Storage Temperature
Ts
—
-40
—
+125
Mechanical Shock
—
Per Mil-STD-883D, Method 2002.3
—
500
—
G’s
Mechanical Vibration
—
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
—
7.5
—
G’s
Weight
—
—
—
14
—
grams
** See SOA curves - Output power is limited to 30W maximum.
Note: The PT6620 Series requires a 330µF(output) and 100µF(input) electrolytic capacitors for proper operation in all applications.
C H A R A C T E R I S T I C
PT6620 Series @V
in=+12V
@Vin=+12V
Safe Operating Area Curves @V
in=+12V
@Vin=+12V
Efficiency vs Output Current
PT6621P, 3.3V
100
90
90
80
80
PT6621
PT6622
PT6623
70
PT6625
PT6626
60
50
Ambient Temperature (°C)
Efficiency (%)
D A T A
70
Nat conv
60LFM
120LFM
50
200LFM
40
30
40
20
0
1
2
3
4
5
6
0
1
2
Output Current (A)
3
4
5
6
7
Output Current (A)
Output Ripple vs Output Current
PT6622P, 1.5V
90
30
80
20
PT6621
PT6622
PT6623
15
PT6625
PT6626
10
5
Ambient Temperature (°C)
25
Ripple (mVpp)
Airflow
Recommended Maximum
Operating Temperature
60
70
Airflow
Recommended Maximum
Operating Temperature
60
N at c onv
60LF M
120LF M
50
200LF M
40
30
20
0
0
1
2
3
4
5
0
6
1
2
Output Current (A)
3
4
5
6
7
Output Current (A)
Power Dissipation vs Output Current
PT6625P, 5.0V
5
90
Pd (Watts)
P T6621
3
P T6622
P T6623
P T6625
2
P T6626
1
Ambient Temperature (°C)
80
4
70
Recommended Maximum
Operating Temperature
60
Airflow
N at c o nv
60LF M
50
120LF M
200LF M
40
30
0
20
0
1
2
3
4
Output Current (A)
5
6
0
1
2
3
4
5
6
7
Output Current (A)
Note: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
49
DATA SHEETS
Symbols
12V Bus Products
Characteristics
(Ta = 25°C unless noted)
For assistance or to order, call
Application
Notes
(800) 531-5782
PT6620 Series
More Application Notes
Adjusting the Output Voltage of the
PT6620 7Amp12V Bus Converter Series
Figure 1
The output voltage of the Power Trends PT6650 Series ISRs
may be adjusted higher or lower than the factory trimmed preset voltage with the addition of a single external resistor. Table 1
accordingly gives the allowable adjustment range for each model
in the series as Va (min) and Va (max).
Adjust Up:
An increase in the output voltage is obtained by
adding a resistor R2, between pin 14 (Vo adjust) and pins 7-10
(GND).
Adjust Down: Add a resistor (R1), between pin 14 (Vo adjust)
and pins 11-13 (Vout).
1
Vsense
4,5,6
Vin
PT6620
Vin
STBY
GND
7,8,9,10
3
C in
330 µF
Vo
11,12,13
Vo
Vo(adj)
14
(R1)
Adj Down
+
C out
330 µF
+
L
O
A
D
R2
Adjust Up
COM
COM
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% resistor in either the (R1) or R2 location. Place the resistor as close to the ISR as possible.
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulae.
2. Never connect capacitors from Vo adjust to either GND,
Vout, or the Remote Sense pin. Any capacitance added to
the Vo 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 (Vo adjust) and pin 1 (Remote
Sense) can benefit load regulation.
4. The minimum input voltage required by the part is Vout + 3,
or 9V, whichever is higher.
(R1)
=
Ro (Va – 1.25)
– Rs
(Vo – Va)
kΩ
R2
=
1.25 Ro
Va - Vo
kΩ
Where:
5. The maximum output current must be limited to the equivalent of 30Watts.
i.e.
Iout (max)
=
12
Va
Vo
Va
Ro
Rs
– Rs
= Original output voltage
= Adjusted output voltage
= The resistance value in Table 1
= The series resistance from Table 1
Adc,
where Va is the adjusted output voltage.
Table 1
PT6620 ADJUSTMENT AND FORMULA PARAMETERS
Series Pt #
PT6622
PT6623
PT6621
PT6624
PT6625
PT6626
Vo (nom)
Va (min)
1.5V
2.5V
3.3V
3.6V
5.0V
9.0V
1.4V
1.9V
2.3V
2.5V
2.9V
5.2V
Va (max)
Ω)
Ro (kΩ
2.7V
3.7V
4.5V
4.8V
6.5V
10.0V
Ω)
Rs (kΩ
2.49
4.99
10.0
4.99
12.1
12.1
16.2
12.1
12.1
12.1
12.1
12.1
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
3
For assistance or to order, call
(800) 531-5782
Application
PT6620 Series
Notes
Table 2
PT6620 ADJUSTMENT RESISTOR VALUES
Series Pt #
Current
Vo (nom)
Va (req’d)
1.4
PT6622
7.5Adc
1.5Vdc
PT6623
7.5Adc
2.5Vdc
PT6621
7.5Adc
3.3Vdc
PT6624
7.5Adc
3.6Vdc
PT6625
6.0Adc
5.0Vdc
(5.0)kΩ
1.5
PT6625
6Adc
5.0Vdc
PT6626
3.3Adc
9.0Vdc
5.2
89.1k
(0.5)kΩ
5.3
55.4k
(1.1)kΩ
1.6
59.9k
5.4
38.5k
(1.9)kΩ
1.7
28.7k
5.5
28.4k
(2.6)kΩ
1.8
18.3k
5.6
21.7k
(3.4)kΩ
1.9
13.1k
(5.8)kΩ
5.7
16.8k
(4.2)kΩ
2.0
10.0k
(10.0)kΩ
5.8
13.2k
(5.1)kΩ
2.1
7.9k
(16.3)kΩ
5.9
10.4k
(6.1)kΩ
2.2
6.4k
(26.7)kΩ
6.0
8.2k
(7.1)kΩ
2.3
5.3k
(47.5)kΩ
(0.6)kΩ
6.1
6.3k
(8.1)kΩ
2.4
4.4k
(110.0)kΩ
(3.4)kΩ
6.2
4.8k
(9.3)kΩ
2.5
3.8k
2.6
3.2k
(6.8)kΩ
(1.7)kΩ
6.3
3.5k
(10.5)kΩ
120.0k
(11.2)kΩ
(4.2)kΩ
6.4
2.4k
(11.9)kΩ
2.7
57.5k
(17.1)kΩ
(7.4)kΩ
6.5
1.4k
(13.3)kΩ
2.8
36.7k
(25.4)kΩ
(11.3)Ω
2.9
26.3k
(37.8)kΩ
(16.4)kΩ
3.0
20.0k
(58.5)kΩ
3.1
15.8k
3.2
12.9k
3.3
10.6k
3.4
8.9k
3.5
6.6
(14.9)kΩ
(0.6)kΩ
6.7
(16.6)kΩ
(23.2)kΩ
(2.1)kΩ
6.8
(18.4)kΩ
(99.8)kΩ
(32.7)kΩ
(3.7)Ω
6.9
(20.5)kΩ
(224.0)kΩ
(46.9)kΩ
(5.5)kΩ
7.0
(22.7)kΩ
(70.6)kΩ
(7.4)kΩ
7.1
(25.2)kΩ
139.0k
(118.0)kΩ
(9.7)kΩ
7.2
(27.9)kΩ
7.5k
63.5k
(260.0)kΩ
(12.2)kΩ
7.3
(31.0)kΩ
3.6
6.4k
38.3k
(15.1)kΩ
7.4
(34.4)kΩ
3.7
5.4k
25.7k
139.0k
(18.4)kΩ
7.5
(38.3)kΩ
3.8
18.2k
63.5k
(22.3)kΩ
7.6
(42.8)kΩ
3.9
13.1k
38.3k
(26.9)kΩ
7.8
(53.9)kΩ
4.0
9.5k
25.7k
(32.5)kΩ
8.0
(69.6)kΩ
4.1
6.8k
18.2k
(39.2)kΩ
8.2
(93.0)kΩ
4.2
4.7k
13.1k
(47.6)kΩ
8.4
(132.0)kΩ
4.3
3.0k
9.5k
(58.5)kΩ
8.6
(210.0)kΩ
4.4
1.7k
6.8k
(73.0)kΩ
8.8
(445.0)kΩ
4.5
0.5k
4.7k
(93.2)kΩ
9.0
4.6
3.0k
(124.0)kΩ
9.2
63.5k
4.7
1.7k
(174.0)kΩ
9.4
25.7k
4.8
0.5k
(275.0)kΩ
9.6
13.1k
(579.0)kΩ
9.8
6.8k
10.0
3.0k
4.9
5.0
5.1
R1 = (Red)
4
Series Pt #
Current
Vo (nom)
Va (req’d)
190.0k
R2 = Black
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
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