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PDF TLE4305 Data sheet ( Hoja de datos )
| Número de pieza | TLE4305 | |
| Descripción | Voltage-Current Regulator Wide supply voltage operation range | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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Voltage-Current Regulator
TLE 4305
Features
• Wide supply voltage operation range
• Wide ambient temperature operation range
• Minimized external circuitry
• High voltage regulation accuracy
• High current limit regulation accuracy
• Low temperature drift
• Independent voltage- current-loop compensation
• Internal fixed amplification
• Fully temperature compensated current- and voltage
OTA (operational transconductance amplifier)
• SMD package
• Industrial type
• Green Product (RoHS compliant)
Functional Description
The TLE 4305 G is specifically designed to control the output voltage and the output
current of a switch mode power supply.
Independent compensation networks for the voltage- and for the current-loop can be
realized by external circuitry.
The device contains a high accuracy bandgap reference voltage, two operational trans
conductance amplifier (OTA), an opto-coupler driver output stage and an high-voltage
bias circuit.
The device is based on Infineons double isolated power line technology DOPL which
allows to produce high precision bipolar voltage regulators with breakdown voltages up
to 45 V.
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Type
TLE 4305 G
Data Sheet
Package
PG-DSO-8
1
Rev. 2.2, 2008-11-17
1 page  
TLE 4305
Table 4
Electrical Characteristics
8 V < VS < 42 V; -40 °C < Tj < 150 °C; IOUT = 0 mA; all voltages with respect to ground;
positive current defined flowing into pin; unless otherwise specified.
Parameter
Symbol
Limit Values Unit Test Condition
Min. Typ. Max.
Current Consumption
Supply current
IS – 1 1.5 mA
Supply current
Supply current
IS – – 2 mA
IS – 1.5 2.5 mA
Supply current
IS – –
Reference Voltage (measurable at pin CSE)
4
mA
VS = 9 V;
Tj = 25 °C
VS = 9 V
VS = 42 V;
Tj = 25 °C
VS = 42 V
Voltage at pin CSE
VCSE,ref 2.45 2.50
Voltage at pin CSE
VCSE,ref
Temperature Coefficient ∆VCSE,ref
Voltage-OTA; Pin VSE and VCO
2.425 –
-50 –
2.55
2.575
50
V
V
ppm/K
Tj = 25 °C;
ICSE = 0 mA
ICSE = 0 mA
–
Input voltage threshold VVSE
Input offset voltage
VVSE,io
Transconductance
Output series resistor
Gain Bandwidth Product
Input current
Output current;
source
gV
RVCO
BV
IVSE
IVCO
Output current;
sink
IVCO
– VREF –
-5 –
5
V
mV
–
–
–
-1.0
-150
1
2
500
-0.2
-60
–
–
–
-0
-25
mS
kΩ
kHz
µA
µA
25 60 150 µA
IVCO = 0 mA;
VVCO = 2.5 V
IVCO = 0 mA;
VVCO = 2.5 V
gV = ∆IVCO / ∆UVSE
–
–
VVSE = 0 V
VVSE = 5 V;
VVCO = 2.5 V
VVSE = 0 V;
VVCO = 2.5 V
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Data Sheet
5 Rev. 2.2, 2008-11-17
5 Page 
TLE 4305
Voltage Control Loop
Voltage Loop TLE 4305
from Current Loop
VQ
RV1
VSE
V-OTA
RV2
VREF
Control
Logic
Driver
1 kΩ
OUT
RVC
1 kΩ
VCO
CVCO
10 nF
AES02883
Figure 6 Voltage Loop
The voltage loop regulator compares the input voltage VSE to a reference voltage Vref of
typical 2.5 V. The difference is attenuated and proportional current drives the opto
isolator. The control loop output voltage VQ, pin VSE, pin OUT, opto isolator, primary
regulator and the transformer close the loop.
To program an output voltage a divider is used. The resistors are chosen according to
Equation (5).
VVSE = Vref
(3)
VVSE = VQ × RV2 / (RV1 + RV2)
(4)
with Vref typical 2.5 V
VQ = VVSE × (RV1 + RV2) / RV2
(5)
To compensate the voltage loop a 10 nF capacitor should be connected to pin VCO. With
the internal 1 kΩ resistor it reduces the overall closed voltage loop’s bandwidth.
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If the gain of the overall loop has to be adapted to the application’s needs, the output
capacitor can be modified accordingly.
Data Sheet
11 Rev. 2.2, 2008-11-17
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TLE4305.PDF ] | |
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