PT4313A [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
PT4313A
型号: PT4313A
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

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

转换器 电源电路 输出元件
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  
Gs  
Mechanical Vibration  
Gs  
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 modules 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 modules outputs. A high  
impedance enables the modules 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 + |Io| V  
Efficiency vs. Total Output Current ( Io1 + |Io| 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 |Io| V  
Output Ripple vs. Load ( Io1 or |Io| 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 + |Io| V  
Power ꢀissipation vs Output Current ( Io1 + |Io| 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; |Io| =0.1A (See Note B)  
Temperature ꢀrift; |Io| =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, |Io| =0.ꢁ A, 5IN =387± 5  
Io1 =0 to 0.ꢁ± A, |Io|=0.ꢁ± A, 5IN =387± 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, |Io| =0.6 A  
PT4313; Io1 =0 to 0.4± A, |Io| =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 = |Io| from 0 to 1ꢁ± mA, 5IN =±3 5  
Load Regulation, 5o1 vs Io1 with |Io| =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 = |Io| 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  
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+|Io|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 k)  
(7±0 k)  
(0 k)  
(220 k)  
(9±0 k)  
(±11 k)  
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 modules 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)  
For technical support or further information,visit http://power.ti.com  
IMPORTANT NOTICE  
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,  
enhancements, improvements, and other changes to its products and services at any time and to discontinue  
any product or service without notice. Customers should obtain the latest relevant information before placing  
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms  
and conditions of sale supplied at the time of order acknowledgment.  
TI warrants performance of its hardware products to the specifications applicable at the time of sale in  
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI  
deems necessary to support this warranty. Except where mandated by government requirements, testing of all  
parameters of each product is not necessarily performed.  
TI assumes no liability for applications assistance or customer product design. Customers are responsible for  
their products and applications using TI components. To minimize the risks associated with customer products  
and applications, customers should provide adequate design and operating safeguards.  
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,  
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process  
in which TI products or services are used. Information published by TI regarding third-party products or services  
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.  
Use of such information may require a license from a third party under the patents or other intellectual property  
of the third party, or a license from TI under the patents or other intellectual property of TI.  
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without  
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction  
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for  
such altered documentation.  
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that  
product or service voids all express and any implied warranties for the associated TI product or service and  
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.  
Following are URLs where you can obtain information on other Texas Instruments products and application  
solutions:  
Products  
Applications  
Audio  
Amplifiers  
amplifier.ti.com  
www.ti.com/audio  
Data Converters  
dataconverter.ti.com  
Automotive  
www.ti.com/automotive  
DSP  
dsp.ti.com  
Broadband  
Digital Control  
Military  
www.ti.com/broadband  
www.ti.com/digitalcontrol  
www.ti.com/military  
Interface  
Logic  
interface.ti.com  
logic.ti.com  
Power Mgmt  
Microcontrollers  
power.ti.com  
Optical Networking  
Security  
www.ti.com/opticalnetwork  
www.ti.com/security  
www.ti.com/telephony  
www.ti.com/video  
microcontroller.ti.com  
Telephony  
Video & Imaging  
Wireless  
www.ti.com/wireless  
Mailing Address:  
Texas Instruments  
Post Office Box 655303 Dallas, Texas 75265  
Copyright 2004, Texas Instruments Incorporated  

相关型号:

PT4313C

6-W Low-Profile Dual-Output Isolated DC/DC Converter
TI

PT4314

6-W Low-Profile Dual-Output Isolated DC/DC Converter
TI

PT4314A

6-W Low-Profile Dual-Output Isolated DC/DC Converter
TI

PT4314C

6-W Low-Profile Dual-Output Isolated DC/DC Converter
TI

PT4316

PT4316 SAW-based ASK/OOK Receiver IC Advance Information
PTC

PT4316-S

Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver with SAW-based Oscillator
PTC

PT4316-SL

Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver with SAW-based Oscillator
PTC

PT4316-X

Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver with SAW-based Oscillator
PTC

PT4316-XL

Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver with SAW-based Oscillator
PTC

PT4317

PT4317 Low Power 315/433MHz OOK/ASK Superheterodyne Receiver with SAW-Based Oscillator
PTC

PT4318

Low Power 315/433MHz OOK/ASK Super-heterodyne Receiver with SAW-Based Oscillator
PTC

PT4318-X

Low Power 315/433MHz OOK/ASK Super-heterodyne Receiver with SAW-Based Oscillator
PTC