|
|
PDF LTM8048 Data sheet ( Hoja de datos )
| Número de pieza | LTM8048 | |
| Descripción | uModule DC/DC Converter | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LTM8048 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
LTM8048
3.1VIN to 32VIN Isolated
µModule DC/DC Converter
with LDO Post Regulator
FEATURES
n Complete Switch Mode Power Supply
n 725VDC Isolation
n Wide Input Voltage Range: 3.1V to 32V
n VOUT1 Output:
Up to 440mA (VOUT1 = 2.5V, 24VIN)
2.5V to 13V Output Range
n VOUT2 Low Noise Linear Post Regulator:
Up to 300mA
1.2V to 12V Output Range
n Current Mode Control
n Programmable Soft-Start
n User Configurable Undervoltage Lockout
n SnPb or RoHS Compliant Finish
n Low Profile (11.25mm × 9mm × 4.92mm) Surface
Mount BGA Package
APPLICATIONS
n Industrial Sensors
n Industrial Switches
n Ground Loop Mitigation
DESCRIPTION
The LTM®8048 is an isolated flyback µModule DC/DC
converter with LDO post regulator. The LTM8048 has an
isolation rating of 725VDC. Included in the package are
the switching controller, power switches, transformer, and
all support components. Operating over an input voltage
range of 3.1V to 32V, the LTM8048 supports an output
voltage range of 2.5V to 13V, set by a single resistor. There
is also a linear post regulator whose output voltage is ad-
justable from 1.2V to 12V as set by a single resistor. Only
output, input, and bypass capacitors are needed to finish
the design. Other components may be used to control the
soft-start control and biasing.
The LTM8048 is packaged in a thermally enhanced, com-
pact (11.25mm × 9mm × 4.92mm) over-molded ball grid
array (BGA) package suitable for automated assembly by
standard surface mount equipment. The LTM8048 is avail-
able with SnPb (BGA) or RoHS compliant terminal finish.
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
725V DC Isolated Low Noise µModule Regulator
VIN
3.1V TO 29V
2.2µF
4.7µF
6.19k
LTM8048
VIN
RUN
BIAS
VOUT1
VOUT2
BYP
ADJ1
ADJ2
SS
GND VOUT–
725VDC ISOLATION
5.7V
22µF
162k 10µF
VOUT2
5V
8048 TA01
Total Output Current vs VIN
330
280
230
180
130
80
0
5 10 15 20 25 30
INPUT VOLTAGE (V)
8048 TA01b
For more information www.linear.com/LTM8048
8048fg
1
1 page  
LTM8048
T YPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted, operating conditions are
as in Table 1 (TA = 25°C).
BIAS Current vs VOUT1 Load
13 VOUT1 = 12V
12 BIAS = 5V
12VIN
11
10
9 24VIN
8
7
6
5
4
0 50 100 150 200 250
VOUT1 CURRENT (mA)
8048 G10
Maximum Load vs VIN
500 BIAS = VIN IF VIN ≤ 5V
450 BIAS = 5V IF VIN > 5V
400
350
300
250
200
150
100
0
5 10 15 20
VIN (V)
2.5VOUT1
3.3VOUT1
5VOUT1
25 30
8048 G11
Minimum Load vs VIN
40 2.5VOUT1
35
3.3VOUT1
5VOUT1
30
25
20
15
10
5
0
0 5 10 15 20
VIN (V)
25 30
8048 G13
Minimum Load vs VIN
15 8VOUT1
12VOUT1
12
9
6
3
0
0 5 10 15 20 25 30
VIN (V)
8048 G14
Input Current vs VIN
VOUT2 Shorted
225
200
175
150
125
100
75
50
0 10 20
VIN (V)
VOUT2 Output Ripple and Noise
VIN = 12V
VOUT1 = 5.7V
VOUT2 = 5V
500µV/DIV
30 40
8048 G16
1µs/DIV
MEASURED PER AN70,
USING HP461A AMPLIFIER,
150MHz BW
8048 G26
For more information www.linear.com/LTM8048
Maximum Load vs VIN
350 BIAS = VIN IF VIN ≤ 5V
300 BIAS = 5V IF VIN > 5V
250
200
150
100
50
0
0 5 10 15
VIN (V)
8VOUT1
12VOUT1
20 25
8048 12
Input Current vs
VOUT1 Shorted
VIN
80
70
60
50
40
30
20
10
0 4 8 12 16 20 24 28 32
VIN (V)
8048 G15
VOUT2 Dropout Voltage vs Load
0.7 VOUT2 = 3.3V
0.6
125°C
0.5
25°C
0.4
0.3
–40°C
0.2
0.1
0
0 50 100 150 200 250 300
VOUT2 LOAD CURRENT (mA)
8048 G17
8048fg
5
5 Page 
LTM8048
APPLICATIONS INFORMATION
LTM8048 Table 1b. Recommended Component Values and Configuration for Specific VOUT2 Voltages (TA = 25°C)
VIN VOUT1 VOUT2
VBIAS
CIN
COUT1
COUT2
3.1V to 32V 1.71V 1.2V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
RADJ1
16.5k
3.1V to 32V 2.02V 1.5V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
14.7k
3.1V to 32V 2.34V 1.8V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
13.3k
3.1V to 32V 3.08V 2.5V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
10.5k
3.1V to 32V 3.92V 3.3V 3.1V to 15V or Open 2.2µF, 50V, 1206 47µF, 6.3V, 1210 10µF, 6.3V, 1206
8.66k
3.1V to 29V 5.7V
5V 3.1V to 15V or Open 2.2µF, 50V, 1206 22µF, 16V, 1210 10µF, 6.3V, 1206
6.19k
3.1V to 26V 8.85V 8V 3.1V to 15V or Open 2.2µF, 50V, 1206 22µF, 10V, 1206 10µF, 10V, 1206
4.12k
3.1V to 21V 13V 12V 3.1V to 15V or Open 2.2µF, 25V, 0805 10µF, 16V, 1210 10µF, 16V, 1206 2.94k/12pF*
9V to 15V
9V to 15V
9V to 15V
9V to 15V
9V to 15V
9V to 15V
9V to 15V
9V to 15V
18V to 32V
1.71V
2.02V
2.34V
3.08V
3.92V
5.7V
8.85V
13V
1.71V
1.2V VIN 2.2µF, 50V, 1206
1.5V VIN 2.2µF, 50V, 1206
1.8V VIN 2.2µF, 50V, 1206
2.5V VIN 2.2µF, 50V, 1206
3.3V VIN 2.2µF, 50V, 1206
5V VIN 2.2µF, 50V, 1206
8V VIN 2.2µF, 50V, 1206
12V VIN 2.2µF, 25V, 0805
1.2V 3.1V to 15V or Open 2.2µF, 50V, 1206
100µF, 6.3V, 1210
100µF, 6.3V, 1210
100µF, 6.3V, 1210
100µF, 6.3V, 1210
47µF, 6.3V, 1210
22µF, 16V, 1210
22µF, 10V, 1206
10µF, 16V, 1210
100µF, 6.3V, 1210
10µF, 6.3V, 1206
10µF, 6.3V, 1206
10µF, 6.3V, 1206
10µF, 6.3V, 1206
10µF, 6.3V, 1206
10µF, 6.3V, 1206
10µF, 10V, 1206
10µF, 16V, 1206
10µF, 6.3V, 1206
16.5k
14.7k
13.3k
10.5k
8.66k
6.19k
4.12k
2.94k/12pF*
16.5k
18V to 32V 2.02V 1.5V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
14.7k
18V to 32V 2.34V 1.8V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
13.3k
18V to 32V 3.08V 2.5V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
10.5k
18V to 32V 3.92V 3.3V 3.1V to 15V or Open 2.2µF, 50V, 1206 47µF, 6.3V, 1210 10µF, 6.3V, 1206
8.66k
18V to 29V 5.7V
5V 3.1V to 15V or Open 2.2µF, 50V, 1206 22µF, 16V, 1210 10µF, 6.3V, 1206
6.19k
18V to 26V 8.85V 8V 3.1V to 15V or Open 2.2µF, 50V, 1206 22µF, 10V, 1206 10µF, 10V, 1206
4.12k
Note: Do not allow
*Connect 2.94k in
pBaIAraSlletol weixtche1e2dpVFINfr,oambuAlDkJintpouGt NcaDp.acitor
is
required.
RADJ2
Open
2.32M
1.07M
487k
294k
162k
88.7k
56.2k
Open
2.32M
1.07M
487k
294k
162k
88.7k
56.2k
Open
2.32M
1.07M
487k
294k
162k
88.7k
BIAS Pin Considerations
The BIAS pin is the output of an internal linear regulator
that powers the LTM8048’s internal circuitry. It is set to
3V and must be decoupled with a low ESR capacitor of at
least 4.7μF. The LTM8048 will run properly without apply-
ing a voltage to this pin, but will operate more efficiently
and dissipate less power if a voltage greater than 3.1V is
applied. At low VIN, the LTM8048 will be able to deliver
more output current if BIAS is 3.1V or greater. Up to 32V
may be applied to this pin, but a high BIAS voltage will
cause excessive power dissipation in the internal circuitry.
For applications with an input voltage less than 15V, the
BIAS pin is typically connected directly to the VIN pin. For
input voltages greater than 15V, it is preferred to leave the
BIAS pin separate from the VIN pin, either powered from
a separate voltage source or left running from the internal
regulator. This has the added advantage of keeping the
physical size of the BIAS capacitor small. Do not allow
BIAS to rise above VIN.
Soft-Start
For many applications, it is necessary to minimize the
inrush current at start-up. The built-in soft-start circuit
significantly reduces the start-up current spike and output
voltage overshoot by applying a capacitor from SS to GND.
When the LTM8048 is enabled, whether from VIN reaching
a sufficiently high voltage or RUN being pulled high, the
LTM8048 will source approximately 10µA out of the SS
pin. As this current gradually charges the capacitor from
SS to GND, the LTM8048 will correspondingly increase
the power delivered to the output, allowing for a graceful
turn-on ramp.
For more information www.linear.com/LTM8048
8048fg
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet LTM8048.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LTM8040 | 1A Module LED Driver | Linear Technology |
| LTM8042 | uModule Boost LED Driver and Current Source | Linear Technology |
| LTM8042-1 | uModule Boost LED Driver and Current Source | Linear Technology |
| LTM8045 | Inverting or SEPIC uModule DC/DC Converter | Linear Technology |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |