|
|
PDF LM5034 Data sheet ( Hoja de datos )
| Número de pieza | LM5034 | |
| Descripción | High Voltage Dual Interleaved Current Mode Controller | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM5034 (archivo pdf) en la parte inferior de esta página. Total 29 Páginas | ||
|
No Preview Available !
February 2005
www.DataSheet4U.com
LM5034
High Voltage Dual Interleaved Current Mode Controller
with Active Clamp
General Description
The LM5034 dual current mode PWM controller contains all
the features needed to control either two independent
forward/active clamp dc/dc converters or a single high cur-
rent converter comprised of two interleaved power stages.
The two controller channels operate 180˚ out of phase
thereby reducing input ripple current. The LM5034 includes a
startup regulator that operates over a wide input range up to
100V and compound (bipolar + CMOS) gate drivers that
provide a robust 2.5A peak sink current. The adjustable
dead-time of the active clamp gate drivers and adjustable
maximum PWM duty cycle reduce stress on the primary side
MOSFET switches. Additional features include program-
mable line under-voltage lockout, cycle-by-cycle current
limit, hiccup mode fault operation with adjustable restart
delay, PWM slope compensation, soft-start, and a 2 MHz
capable oscillator with synchronization capability.
Features
n Two independent PWM current mode controllers
n Integrated high voltage startup regulator
n Compound 2.5A main output gate drivers
n Single resistor oscillator setting to 2 MHz
n Synchronizable oscillator
n Active clamp gate driver for P-channel MOSFETs
n Adjustable gate drive overlap time
n Programmable maximum duty cycle
n Maximum duty cycle fold-back at high line voltage
n Adjustable timer for hiccup mode current limiting
n Integrated slope compensation
n Adjustable line under-voltage lockout
n Independently adjustable soft-start (each regulator)
n Direct interface with opto-coupler transistor
n Thermal shutdown
Applications
n Telecommunication Power Converters
n Industrial Power Converters
n +42V Automotive Systems
Packages
n TSSOP-20
Typical Application Circuit
Dual Interleaved Regulators with Independent Outputs
20136801
© 2005 National Semiconductor Corporation DS201368
www.national.com
1 page  
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN to GND
VCC to GND
RT/SYNC, RES and DCL to GND
CS Pins to GND
All other inputs to GND
ESD Rating (Note 5)
Human Body Model
-0.3V to 105V
-0.3V to 16V
-0.3V to 5.5V
-0.3V to 1.25V
-0.3V to 7V
2kV
Storage Temperature Range
Junction Temperature
Lead Temperature (Soldering 4 sec),
(Note 2)
-55˚C to 150˚C
15w0w˚Cw.DataSheet4U.com
260˚C
Operating Ratings (Note 1)
VIN Voltage
External Voltage Applied to VCC1,
VCC2
Operating Junction Temperature
13.0V to 100V
8V to 15V
-40˚C to +125˚C
Electrical Characteristics
Specifications with standard typeface are for TJ = 25˚C, and those with boldface type apply over full Operating Junction
Temperature range. VIN = 48V, VCC1 = VCC2 = 10V externally applied, RT = RDCL = 42.2kΩ, ROVLP =70kΩ, UVLO =
1.5V, unless otherwise stated (Note 3) and (Note 4).
Symbol
Parameter
Conditions
Min Typ Max Units
Startup Regulator (VIN, VCC1, VCC2 Pins)
VCCReg
VCC voltage
VCC1 connected to VCC2, ext. supply
disconnected.
7.4
7.7 8 V
ICC(Lim)
VCC current limit
Sum of currents out of VCC1 and VCC2
with VCC1 = VCC2 = 0V.
19
22
mA
VCC UVT
IIN
ICCIn
VCC Under-voltage threshold VCC1 connected to VCC2, ext. supply
(VCC increasing)
disconnected, VIN =11V.
VCC decreasing
Startup regulator current
VIN = 90V, UVLO = 0V
Supply current into VCC
from external source
Output loads = open, VCC = 10V
VCC -
300 mV
5.5
VCC -
100 mV
6.2
500
4.3
6.9
600
7
V
V
µA
mA
UVLO
UVLO
Under-voltage threshold
1.22
1.25 1.28 V
IHYST
Hysteresis current
Current Sense Input (CS1, CS2 Pins)
16 20 24 µA
CS Current Limit Threshold
0.45
0.5 0.55 V
CS delay to output
CS1 (CS2) taken from zero to 1.0V.
Time for OUT1 (OUT2) to fall to 90% of
VCC1 (VCC2). Output load = 0 pF.
40 ns
Leading edge blanking time
at CS1 (CS2)
50 ns
CS1 (CS2) sink impedance Internal pull-down FET on.
(clocked)
30 55 Ω
RCS Equivalent input resistance CS taken from 0.2V to 0.5V, internal
at CS
FET off.
42 kΩ
Current Limit Restart (RES Pin)
ResTh
Threshold
2.4
2.55 2.7
V
Charge source current
15 20 25 µA
Discharge sink current
7.5 10 12.5 µA
Soft-start (SS1, SS2 Pins)
ISS Current source (normal
operation)
35 50 65 µA
Current source during a
current limit restart
0.7 1 1.3 µA
VSS Open circuit voltage
5V
5 www.national.com
5 Page 
Typical Performance
Characteristics (Continued)
www.DataSheet4U.com
20136810
FIGURE 8. VCC vs ICC (Externally Loaded)
20136812
FIGURE 10. User Defined Maximum Duty Cycle vs.
RDCL Resistor
20136811
FIGURE 9. Oscillator Frequency vs RT Resistor
20136813
FIGURE 11. Maximum Duty Cycle vs. UVLO Voltage
11 www.national.com
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet LM5034.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM5030 | 100V Push-Pull Current Mode PWM Controller | National Semiconductor |
| LM5030 | LM5030 100-V Push-Pull Current Mode PWM Controller (Rev. D) |  Texas Instruments |
| LM5030MM | 100V Push-Pull Current Mode PWM Controller | National Semiconductor |
| LM5030MMX | 100V Push-Pull Current Mode PWM Controller | National Semiconductor |
| 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 |