SP000081008 Infineon Technologies, SP000081008 Datasheet - Page 9

• Manufacturer Part Number: SP000081008
• Manufacturer: Infineon Technologies

Specifications of SP000081008

• Start-up Supply Current: 1mA
• Operating Supply Voltage (min): -0.3V
• Operating Supply Voltage (max): 17V
• Operating Temp Range: -25C to 125C
• Operating Temperature Classification: Commercial
• Package Type: DSO
• Pin Count: 14
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Figure 5
Primary Current Simulation PCS (Pin 2) / Current Limiting
A voltage proportional to the current of the power transistor is generated at Pin 2 by the
RC-combination
power transistor is switched off and during its switch on time
the rectified mains. The equation of
:
L
The voltage
The other input is the control voltage. If
switches off (current limiting). The maximum value of the control voltage is the internal
reference voltage 5 V, so the maximum current in the power transistor (
:
The control voltage can be reduced by either the Error Amplifier EA (current mode
regulation), or by an opto coupler at Pin 5 (regulation with opto coupler isolation) or by
the voltage
Version 2.0
primary
: Primary inductance of the transformer
V
V
11
2
Startup Voltage Diagram
is applied to one input of the On Time Comparator ONTC (see Figure 2).
at Pin 11 (Fold Back Point Correction).
R
2
,
C
2
(Figure 4). The voltage at Pin 2 is forced to 1.5 V when the
V
2
I
Mprimary
=
1,5 V
V
2
and the current in the power transistor (
=
+
3,5 V
--------------------------------------
L
------------------------------- -
V
9
primary
2
L
exceeds the control voltage, the driver
R
primary
2
R
2
C
I
primary
2
C
2
C
2
TDA 16846/16846-2
TDA 16847/16847-2
is charged by
I
Mprimary
31 Jul 2003
I
) is
primary
R
2
from
) is