|
|
PDF TLE4678 Data sheet ( Hoja de datos )
| Número de pieza | TLE4678 | |
| Descripción | 5V Fixed Output Voltage | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de TLE4678 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
TLE4678
5 V Fixed Output Voltage
TLE4678GM
TLE4678EL
Low Drop Out Linear Voltage Regulator
Datasheet
Rev. 1.2, 2014-10-17
Automotive Power
1 page  
TLE4678
Pin Configuration
3 Pin Configuration
3.1 Pin Assignment PG-DSO-14
WO
WADJ
GND
GND
GND
D
RADJ
1
2
3
4
5
6
7
14
13
12
11
10
9
8
P inout_SO14 .vsd
RO
I
GND
GND
GND
Q
WI
Figure 2 Pin Assignment PG-DSO-14 Package
3.2 Pin Definitions and Functions PG-DSO-14
Pin Symbol
1 WO
2 WADJ
3, 4, 5, GND
10, 11, 12
6D
Function
Watchdog Output
Open collector output with an internal pull-up resistor to the output Q.
An additional external pull-up resistor to the output Q is optional.
Leave open if the watchdog function is not needed.
Watchdog Activating Threshold Adjust
An external resistor to GND determines the watchdog activating threshold.
Connect directly to GND for disabling the watchdog.
Connect directly to GND if the watchdog function is not needed.
Connect to output Q via 270 kΩ resistor for permanently activating the watchdog.
IC Ground
Interconnect the GND pins on PCB.
Connect to heat sink area.
Reset Delay and Watchdog Timing
Connect a ceramic capacitor D (pin 6) to GND for reset delay and watchdog timing
adjustment.
Leave only open if both the reset and the watchdog function are not needed.
Datasheet
5 Rev. 1.2, 2014-10-17
5 Page 
TLE4678
Voltage Regulator
5 Voltage Regulator
5.1 Description Voltage Regulator
The output voltage VQ is controlled by comparing a portion of it to an internal reference and driving a PNP
pass transistor accordingly. Saturation control as a function of the load current prevents any oversaturation
of the pass element. The control loop stability depends on the output capacitor CQ, the load current, the chip
temperature and the poles/zeros introduced by the integrated circuit. To ensure stable operation, the output
capacitor’s capacitance and its equivalent series resistor ESR requirements given in the table “Functional
Range” on Page 9 have to be maintained. For details see also the typical performance graph “Output
Capacitor Series Resistor ESRCQ vs. Output Current IQ”. Also, the output capacitor shall be sized to buffer load
transients.
An input capacitor CI is not needed for the control loop stability, but recommended to buffer line influences.
Connect the capacitors close to the IC terminals.
Protection circuitry prevents the IC as well as the application from destruction in case of catastrophic events.
These safeguards contain output current limitation, reverse polarity protection as well as thermal shutdown
in case of overtemperature.
In order to avoid excessive power dissipation that could never be handled by the pass element and the
package, the maximum output current is decreased at input voltages above VI = 22 V.
The thermal shutdown circuit prevents the IC from immediate destruction under fault conditions (e.g. output
continuously short-circuited) by switching off the power stage. After the chip has cooled down, the regulator
restarts. This leads to an oscillatory behaviour of the output voltage until the fault is removed. However, a
junction temperature above 150 °C is outside the maximum rating and therefore reduces the IC lifetime.
The TLE4678GM allows a negative supply voltage. However, several small currents are flowing into the IC
increasing its junction temperature. This has to be considered for the thermal design, respecting that the
thermal protection circuit is not operating during reverse polarity condition.
Supply
II I
+ Saturation Control
Current Limitation
VI CI
Temperature
Shutdown
BlockDiagram _VoltageRegulator .vsd
Bandgap
Reference
GND
Figure 4 Block Diagram Voltage Regulator Circuit
Regulated
Q IQ Output Voltage
+
CQ VQ LOAD
Datasheet
11 Rev. 1.2, 2014-10-17
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TLE4678.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TLE4675 | Low Drop Out Linear Voltage Regulator | Infineon Technologies |
| TLE4678 | 5V Fixed Output Voltage | Infineon Technologies |
| TLE4678-2 | Low Drop Out Linear Voltage Regulator |  Infineon |
| 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 |