PT4311C [TI]
6-W Low-Profile Dual-Output Isolated DC/DC Converter; 6 -W小尺寸双输出隔离式DC / DC转换器型号: | PT4311C |
厂家: | TEXAS INSTRUMENTS |
描述: | 6-W Low-Profile Dual-Output Isolated DC/DC Converter |
文件: | 总9页 (文件大小:212K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
PT4310 Series —48V
6-W Low-Profile Dual-Output
Isolated DC/DC Converter
SLTS146B - MARCH 2001 - REVISED MAY 2004
Features
•
•
•
•
•
•
•
•
Dual Complimentary Outputs
Wide Input Voltage: 38 V to 7± V
1,±00 VDC Isolation
9 Pin DIP Package
Low-Profile (8mm)
Pin-compatible with PT4300 Series
No External Components Required
Safety Approvals: UL / cUL 609±0
EN 609±0
Description
Pin-Out Information
Ordering Information
The PT4310 modules are a low-power series
of isolated DC/DC converters that produce a dual
complimentary output. The PT4310 series is
pin-compatible with the PT4300 series, and
has improved temperature compensation. These
modules are an ideal alternative to the PT4300
for both new and existing designs.
PT4311q
=
±± V/1.2 A
Pin Function
PT4313q = ±12 V/0.± A
PT4314q = ±24 V/0.2± A
1
2
3
8
9
Vo1 (+)
COM
Vo2 (–)
N/C
N/C
PT Series Suffix
(PT1234x)
Applications include Telecom and Datacom
systems where both board space and height are
a premium.
The PT4310 series is offered in an open-
frame lightweight package, and is available in
both through-hole or SMD-DIP package types.
Models include the standard output voltages,
±± V, ±12 V, and ±24 V. The output voltages are
adjustable by up to ±%.
11 Remote On/Off
#
Case/Pin
Order
Package
Configuration
Suffix
Code
12 ±Vout Adjust
17 –Vin
#
Horizontal
SMD
A
C
(EGK)
(EGL)
18 +Vin
(Reference the applicable package code draw-
ing for the dimensions and PC board layout)
Package Top View
Vo1 (+)
COM
1
2
3
18
17
+Vin
–Vin
Vo2 (–)
PT4310
12
11
±Vo Adjust
#
#
N/C
N/C
8
9
Remote On/Off
# For more information on the Remote On/Off control and
output voltage adustment, refer to the application notes.
For technical support or further information, visit http://power.ti.com
PT4310 Series —48V
6-W Low-Profile Dual-Output
Isolated DC/DC Converter
SLTS146B - MARCH 2001 - REVISED MAY 2004
Environmental Specifications
PT4310 Series
Characteristic
Symbol
Conditions
Min
Typ
Max
Units
(i)
Operating Temperature Range
Solder Reflow Temperature
Storage Temperature
Reliability
T
Treflow
Over Vin range
Surface temperature of module, case or pins
—
–40
—
–40
4.0
—
—
—
—
+8±
21±
°C
°C
°C
106 Hrs
a
T
+12±
—
s
MTBF
Per Bellcore TR-332
±0% stress, Ta =40°C, ground benign
Mechanical Shock
—
Per Mil-Std-883D, method 2002.3,
1 mS, half-sine, mounted to a fixture
Per Mil-Std-883D, method 2007.2,
20-2000 Hz, soldered in a PC board
—
—
—
±00
20
—
—
—
G’s
Mechanical Vibration
—
G’s
Weight
Flammability
—
—
—
10
grams
Materials meet UL 94V-0
Notes: (i) See Safe Operating Area curves or contact the factory for the appropriate derating.
(ii) During solder reflow of SMD package version, do not elevate the module, case, pins, or internal component temperatures above a peak of 215°C. For
further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Mount Products,” (SLTA051).
Pin Descriptions
+Vin: The positive input supply for the module with respect
Vo1: The positive regulated power output voltage, which is
referenced to the COM node.
to –Vin. When powering the module from a –48-V telecom
central office supply, this input is connected to the primary
system ground.
Vo2: The negative regulated power output voltage, which is
referenced to the COM node.
–Vin: The negative input supply for the module, and the
0-VDC reference for the ‘Remote On/Off’ and ‘ Vo Adjust’
control inputs. When the module is powered from a +48-V
supply, this input is connected to the input source return.
COM: The secondary return reference for the module’s two
regulated output voltages. It is dc isolated from the +Vin
and –Vin input supply pins.
Vo Adjust: Using a single resistor, this pin allows the
module’s complementary output voltages to be adjusted
higher or lower than their preset value. If not used, this
pin should be left open circuit. Consult the related appli-
cation note for further information.
Remote On/Off: This is an open-collector (open-drain)
negative logic input that enables the module output. The
input is referenced to –Vin. Applying a low-level ground
signal to this pin disables the module’s outputs. A high
impedance enables the module’s outputs. If not used the
pin should be left unconnected.
For technical support or further information,visit http://power.ti.com
PT4310 Series —48V
6-W Low-Profile Dual-Output
Isolated DC/DC Converter
SLTS146B - MARCH 2001 - REVISED MAY 2004
Specifications (Unless otherwise stated, Ta =2±°C, Vin =±3 V, Cout =0 µF, and Io1
= Io2 =Iotyp)
PT4310 Series
Characteristic
Symbol
Conditions
Min
Typ
Max
Units
Ouput Power
Po(tot)
—
—
6
W
(1)
(1)
(2)
(2)
(2)
Output Current
Io1, Io2
Over Vin range
PT4311 ( ±± V)
PT4313 (±12 V)
PT4314 (±24 V)
0.2
0.6
1
(any one output)
0.0±
0.02
0.2±
0.12±
0.4±
0.12±
A
Io1 + Io2
Over Vin range
(sum-total from both outputs)
PT4311
PT4313
PT4314
0.4
—
—
—
1.2
0.1
0.±
A
0.04
0.2±
Input Voltage Range
Set Point Voltage
Vin
Over Io range
38
—
7±
V
(1)
Vo1, Vo2
PT4311
PT4313
PT4314
4.9±
±.0±
12
±.1±
11.8±
23.28
12.1±
24.72
V
24
Temperature Variation
Regtemp
–40 >Ta> +8±°C
PT4311
PT4313
PT4314
—
—
—
±0.±
±1
—
—
—
%V
mV
±1
Line Regulation
Load Regulation
Regline
Regload
Over Vin range
—
±2±
±40
Iox =0.6 A, 0.2 A ≤ Ioy ≤ 0.6 A
Iox =0.2± A, 0.0± A ≤ Ioy ≤ 0.2± A PT4313
Iox =0.12± A, 0.02 A ≤ Ioy ≤ 0.12± A PT4314
PT4311
—
—
—
100
2±0
27±
1±0
3±0
±00
mV
Total Output Voltage Variation
No-load Output Voltage
∆Votot
Over Vin and load range
–40°C >Ta > +8±°C
Io1 = Io2 = 0
PT4311, PT4314
PT4313
—
—
—
—
—
±±
±4
—
—
±.9
17
29
%Vo
V
Vo(no-load)
PT4311
PT4313
PT4314
±.4
12.7
24.8
Efficiency
η
PT4311
PT4313
PT4314
—
—
—
82
8±
82
—
—
—
%
Vo Ripple (pk-pk)
Vr
20 MHz bandwidth
PT4311
—
—
±0
90
100
1±0
mVpp
µs
PT4313, PT4314
Transient Response
ttr
20% ≤ Ioy ≤ 7±% of Iotyp, 2±%load step Iox
—
2±0
—
Vox over/undershoot
PT4311
PT4313
PT4314
—
—
—
±7±
±200
±±00
—
—
—
∆Vtr
mV
Output Voltage Adjust Range
Current Limit Threshold
∆±Vo adj
ILim
Both outputs adjusted simulatenously
—
—
—
±
2.±
0.4
—
—
—
%Vo
A
Over Vin range,
PT4311, PT4313
PT4314
∆Vo=10%Vonom
Short Circuit Current
Inrush Current
Isc
PT4311, PT4313
PT4314
—
—
—
—
1
—
—
—
—
A
0.2±
Iir
tir
On start-up
0.±
1
A
ms
Switching Frequency
Under-Voltage Lockout
ƒo
UVLO
Over Vin range
400
—
—
36
±20
—
kHz
V
Remote On/Off (Pin 11)
Referenced to –Vin (pin 17)
(3)
Input High Voltage
VIH
VIL
IIL
Iin standby
Cin
Cout
±
—
—
–0.2
10
1
—
—
—
Open
+1
–
—
—
V
–0.1
Input Low Voltage
Input Low Cunrrent
—
—
—
0
0
0
mA
mA
µF
Standby Input Current
Internal Input Capacitance
External Output Capacitance
pins 11 & 17 connected
(4)
(4)
(4)
Sum-total capacitance, connected from PT4311
both outputs to COM (pin 2)
120
47
PT4313
PT4314
µF
20
Isolation Voltage
Capacitance
Resistance
Input - output
1±00
—
10
—
—
—
—
V
1100
—
pF
MΩ
Notes: (1) Io2 and Vo2 indicates the magnitudes of the negative output parameters. Parameters within vertical brackets are quoted absolute.
(2) The DC/DC converter will operate at no load with reduced specifications. See “No-load Output Voltage” specification.
(3) The Remote On/Off (pin 11) has an internal pull-up. If the pin is left open the module will operate when input power is applied. Refer to the application
notes for interface considerations.
(4) Output capacitors are not required for proper operation. If added, Oscon® or tantalum types are recommended for operation below 0°C ambient.
For technical support or further information, visit http://power.ti.com
Typical Characteristics
PT4310 Series —48V
6-W Low-Profile Dual-Output
Isolated DC/DC Converter
SLTS146B - MARCH 2001 - REVISED MAY 2004
PT4311 (±±5V Characteristic ꢀata (See Note A)
PT4313 (±1ꢁ5V Characteristic ꢀata (See Note A)
Efficiency vs. Total Output Current ( Io1 + |Ioꢁ| V
Efficiency vs. Total Output Current ( Io1 + |Ioꢁ| V
90
90
80
80
70
60
50
VIN
VIN
38V
38V
70
53V
53V
75V
75V
60
50
0
0.1
0.2
0.3
0.4
0.5
0.2
0.4
0.6
0.8
1
1.2
Io1 + Io2 (A)
Io1 + Io2 (A)
Output Ripple vs. Load ( Io1 or |Ioꢁ| V
Output Ripple vs. Load ( Io1 or |Ioꢁ| V
100
80
60
40
20
0
120
100
80
60
40
20
0
VIN
VIN
38V
38V
53V
75V
53V
75V
0
0.2
0.4
0.6
0.8
1
0
0.1
0.2
0.3
0.4
0.5
Io1 : Io2 (A)
Io1 : Io2 (A)
Power ꢀissipation vs. Total Output Current ( Io1 + |Ioꢁ| V
Power ꢀissipation vs Output Current ( Io1 + |Ioꢁ| V
2
1.5
1
1.6
1.2
0.8
0.4
0.0
VIN
VIN
75V
53V
38V
75V
53V
38V
0.5
0
0
0.1
0.2
0.3
0.4
0.5
0.2
0.4
0.6
0.8
1
1.2
Io1 + Io2 (A)
Io1 + Io2 (A)
Temperature ꢀrift; |Ioꢁ| =0.1A (See Note B)
Temperature ꢀrift; |Ioꢁ| =0.ꢁA (See Note B)
50
25
0
100
50
Io1 (A)
Io1 (A)
0.2
0.4
0.6
0.8
1.0
0
0.4
0.3
0.2
0.1
-50
-100
-150
-25
-50
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Ta (°C)
Ta (°C)
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
Note B: Drift with temperature is normalized to the static output voltage measured at 25°C.
For technical support or further information,visit http://power.ti.com
Typcial Characteristics
PT4310 Series —48V
6-W Low-Profile Dual-Output
Isolated DC/DC Converter
SLTS146B - MARCH 2001 - REVISED MAY 2004
PT4313 (±1ꢁ 5V Characteristic ꢀata (See Note A)
PT4311 (±± 5V Characteristic ꢀata (See Note A)
Load Regulation, 5ox vs Iox with Ioy =0.ꢁ A & 5IN =±3 5
4.0%
Load Regulation, 5ox vs Iox with Ioy =0.0± A & 5IN =±3 5
4.0%
2.0%
2.0%
Vo 1 / Io 1
Vo 2 / Io 2
0.0%
Vo 1 / Io 1
Vo 2 / Io 2
0.0%
-2.0%
-2.0%
-4.0%
0
0.2
0.4
0.6
0.8
1
1.2
-4.0%
Io1 : Io2 (A)
0
0.1
0.2
0.3
0.4
0.5
Io1 : Io2 (A)
Cross Regulation, 5ox vs Ioy with Iox =0.ꢁ A & 5IN =±3 5
Cross Regulation, 5ox vs Ioy with Iox =0.0± A & 5IN =±3 5
1.0%
1.0%
0.5%
0.5%
Vo 1 / Io 2
Vo 2 / Io 1
Vo 1 / Io 2
Vo 2 / Io 1
0.0%
0.0%
-0.5%
-0.5%
-1.0%
-1.0%
0
0.2
0.4
0.6
0.8
1
1.2
0
0.1
0.2
0.3
0.4
0.5
Io1 : Io2 (A)
Io1 : Io2 (A)
PT4311 Safe Operating Area Curves (See Note C)
PT4313 Safe Operating Area Curves (See Note C)
Io1 =0 to 1 A, |Ioꢁ| =0.ꢁ A, 5IN =38–7± 5
Io1 =0 to 0.ꢁ± A, |Ioꢁ|=0.ꢁ± A, 5IN =38–7± 5
90
90.0
80
80.0
70
70.0
Airflow
Airflow
60
50
40
30
20
200LFM
120LFM
Nat conv
60.0
60LFM
Nat conv
50.0
40.0
30.0
20.0
0
0.2
0.4
0.6
0.8
1
0.00
0.05
0.10
Io1 (A)
0.15
0.20
0.25
Io1 (A)
PT4311; Io1 =0 to 0.6 A, |Ioꢁ| =0.6 A
PT4313; Io1 =0 to 0.4± A, |Ioꢁ| =0.0± A
90.0
90
80
70
60
50
40
30
20
80.0
70.0
60.0
50.0
40.0
30.0
20.0
Airflow
Airflow
200LFM
120LFM
60LFM
200LFM
120LFM
Nat conv
Nat conv
0
0.1
0.2
0.3
0.4
0.5
0.6
0.0
0.1
0.2
Io1 (A)
0.3
0.4
Io1 (A)
Note A: The above characteristic data has been developed from actual products tested at 25°C and Vin =53V. This data is considered typical data for the converter.
Note C: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
For technical support or further information, visit http://power.ti.com
Typcial Characteristics
PT4310 Series —48V
6-W Low-Profile Dual-Output
Isolated DC/DC Converter
SLTS146B - MARCH 2001 - REVISED MAY 2004
PT 4314 Safe Operating Area Curves (See Note C)
PT4314 (±ꢁ4 5V Characteristic ꢀata (See Note A)
Io1 = |Ioꢁ| from 0 to 1ꢁ± mA, 5IN =±3 5
Load Regulation, 5o1 vs Io1 with |Ioꢁ| =0.0ꢁ A
90
90
80
80
Airflow
70
60
50
40
30
20
VIN
200LFM
120LFM
60LFM
36 V
70
60
50
53 V
75 V
Nat conv
0
25
50
75
100
125
0
25
50
75
100
125
Io1 = |Io2| (mA)
Io1 = |Io2| (mA)
Power ꢀissipation vs Output Current ( Io1 = |Ioꢁ| V
2.5
2
1.5
1
VIN
36 V
53 V
75 V
0.5
0
0
25
50
75
100
125
Io1 = |Io2| (mA)
Load Regulation, 5ox vs Iox with Ioy =0.0ꢁ A & 5IN=±3 5
2%
1%
Vo 1 / Io 1
Vo 2 / Io 2
0%
-1%
-2%
0
25
50
75
100
125
Io1 : Io2 (mA)
Cross Regulation, 5ox vs Ioy with Iox =0.0ꢁ A & 5IN =±3 5
1.0%
0.5%
Vo 1 / Io 2
0.0%
Vo 2 / Io 1
-0.5%
-1.0%
0
25
50
75
100
125
Io1 : Io2 (mA)
Note A: The above characteristic data has been developed from actual products tested at 25°C and Vin =53V. This data is considered typical data for the converter.
Note C: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
For technical support or further information,visit http://power.ti.com
Application Notes
PT4310 Series
Adjusting the Output 5oltage of the PT4310
Series of Isolated ꢀC/ꢀC Converters
The PT4310 is a series of 6-watt isolated dual-output
DC/DC converters. The PT4310 series is functionally
similar and pin-compatible with the former PT4300 series,
Figure 1-1
1
but the adjustment of the output voltages is different .
1
2
3
+VIN
Vo1 (+)
COM
18
17
+Vin
-Vin
The ±Vo output voltages of the PT4310 series may be
adjusted higher or lower than the factory trimmed value.
The adjustment method uses a single external resistor to
adjust the magnitude of both output voltages by as much
as ±±%. When adjusting the output voltages to a lower
value, an external bias voltage, referenced to the –Vin
PT4310
(R3)
31.6k
Ω
Vo2 (–)
Remote
±Vo
On/Off
Adjust
11
12
(R1)
Adj Down
(VR1), 5.1V
MM3Z5V1
R2
Adjust Up
2
(primary), is also required.
–VIN
Note: (R3) and (VR1) are only
required with (R1), for adjusting
the output down.
Figure 1-1 gives a suggested schematic for the PT4310
output voltage adjustment. The components (R3) and
(VR1) are only required with (R1).
3
Notes
1. In most stand-alone applications the PT4310 series is a
direct substitute for the PT4300 series. However, the
method of output voltage adjustment differs between
the two series. For existing applications that use a
PT4300 part, a modification to the circuit will be
necessary if the output voltage is required to be
adjusted to a value other than the pre-trimmed factory
setting.
Adjust Up: Add a resistor, R2, between Vo Adjust (pin 12)
and –Vin (pin 17).
Adjust ꢀown: An increase in the ±Vout output voltages is
obtained by adding a resistor, (R1), between Vo Adjust
(pin 12) and a +± VDC external voltage source. The
voltage source must be referenced to –Vin (pin 17). A
simple external voltage source may be implemented by
adding the components (R3) and (VR1) in Figure 1-1.
2. The adjustment control input, Vo Adjust (pin 12) is
referenced to –Vin (pin 17).
3. (R3) and (VR1) provide a +± VDC external bias voltage
that is required for (R1) to adjust the output voltages
down. If the outputs are to be adjusted up, only the R2
is required.
Refer to Table 1-1 for the value of the external adjust
resistors, R2, or (R1) required to adjust each model of the
PT4310 series, up or down respectively by the stated
percentage. See Figure 1-1 for the placement of (R1),
R2, and other components.
4. The PT4310 series is rated for 6 watts total output.
An increase in the output voltage will require a
corresponding reduction in the maximum allowed
total output current (Io1 + Io2 ) max in Table 1-1.
The total current from both outputs must comply
with the following equation:-
Table 1-1
ꢀC/ꢀC CON5ERTER AꢀJUSTMENT RESISTOR 5ALUES
Series Pt #
5o (nomV
(Io1+|Ioꢁ|Vmax 4 1.ꢁ A
PT4311
±± 5
PT4313
±1ꢁ 5
0.± A
PT4314
±ꢁ4 5
0.ꢁ± mA
6
Va
|±5o|% Adjust
Io1 + Io2
=
Adc or (Io1 + Io2 )max,
whichever is less.
–±.0%
–2.±%
0.0%
(90.9 kΩ)
(7±0 kΩ)
(0 kΩ)
(220 kΩ)
(9±0 kΩ)
(±11 kΩ)
Where, Va = the new (adjusted) output voltage.
+2.±%
+±.0%
7±0 kΩ
90.9 kΩ
±11 kΩ
0 kΩ
9±0 kΩ
220 kΩ
R
1
= (Blue)
R =Black
2
For technical support or further information, visit http://power.ti.com
Application Notes
PT4310 Series
Using the Remote On/Off Function on the
PT4310 Isolated ꢀual Output ꢀC/ꢀC Converters
Table ꢁ-ꢁ; U5LO Thresholds 4
For applications requiring output voltage On/Off control,
the PT4310 DC/DC converter series incorporates a
“Remote On/Off” control (pin 11). This feature can be used
when there is a requirement for the module to be switched
off without removing the applied input source voltage.
Series
5in Range
U5LO Threshold
PT4310
38 – 7± V
36 ±2 V
The converter operates normally with Pin 11 open-circuit,
and produces a regulated output voltage when a valid
source voltage is applied to +Vin (pin 18), with respect
to –Vin (pin 17). When a low-level ground signal is
applied to pin 11, the converter output will be turned off.
Figure ꢁ-1
1
2
3
Vo1 (+)
+ Vin
-Vin
+ Vo
-Vo
1
18
17
+Vin
-Vin
COM
PT4310
Figure 2-1 shows an application schematic, which details
the typical use of the Remote On/Off function. Note the
discrete transistor (Q1). The control pin has its own
internal pull-up, and must be controlled with an open-
collector or open-drain device (See notes 2 & 3). Table 2-1
gives the input requirements.
Vo2 (–)
Remote
±Vo
Note
1
On/Off
Adjust
11
12
Q1
BSS138
1
=OFF
Note
1
Vdd
When placed in the “Off” state, the standby current drawn
from the input source is typically reduced to less than 1 mA.
R1
10k
D1
1N4148
#
U1a
Note
Table ꢁ-1; Remote On/Off Control Requirements 1
#
or similar low-leakage PIN diode
1
Parameter
Min
Typ
Max
1 V
Disable
Enable
–0.1 V
—
—
3
2
Turn-On Time: In the circuit of Figure 2-1, turning Q1 on
applies a low-voltage to pin 11 and disables the converter
output. Correspondingly, turning Q1 off allows the con-
verter to power up and produce a regulated output voltage
within ±0 ms. Although the rise-time of the output is short
(<1ms), the delay time will vary depending upon the input
voltage and the module’s internal timing. Figure 2-2
shows response of the +±-V output from the PT4311
(±± V), following the turn-off of Q1 at time t =0. The
waveform was measured with a 48 Vdc input voltage,
and 0.2±-Adc resistive load at both the positive and
negative outputs.
± V
Open-Circuit
V
[Open-Circuit]
—
—
—
10 V
—
o/c
[pin 11 at –V
I
–200 µA
in
in]
Notes:
1. The Remote On/Off control uses –Vin (pin 17) as its
ground reference. All voltages specified are with respect
to –Vin.
2. Use an open-collector device (preferably a discrete
transistor) for the Remote On/Off input. Do not connect
a pull-up resistor directly to pin 11.
3. The Remote On/Off pin may be controlled with devices that
have a totem-pole output providing that a blocking
diode is used. The blocking diode is required to prevent
current from being injected into On/Off control pin.
Note: For TTL devices a pull-up may be required on the
cathode side of the blocking diode. This is to guarantee a
minimum enable voltage at pin 11 (See Figure 2-1).
Figure ꢁ-ꢁ
VO (2V/Div)
4. The PT4310 converters incorporate an “Under-Voltage
Lockout” (UVLO). The UVLO will keep the module
off when the input voltage to the converter is low,
regardless of the state of the Remote On/Off control.
Table 2-2 gives the UVLO input voltage thresholds.
delay time
0
5
10
15
20
25
30
time (milli-secs)
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