SP000081008 Infineon Technologies, SP000081008 Datasheet - Page 8

• 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

Version 2.0
2
Start Up Behaviour (Pin 14)
When power is applied to the chip and the voltage
upper threshold (
I
and control output (Pin 4) will be actively held low. When
threshold (
SVC threshold (
start-up circuit and Figure 5 shows the voltage
done by resistor
D1, so no additional start up resistor is needed. The capacitor
current until the auxiliary winding of the transformer supplies the chip with current
through the external diode D14.
It is recommended to apply a small RF snubber capacitor of e.g. 100 nF parallel to the
electrolytic capacitor at pin 14 as shown in the application circuits in Figures 15, 16 , and
17.
To avoid multiple pulses during start up in fixed frequency mode (danger of transformer
saturation), the IC works in freerunning mode until the pulses at pin 3 (RZI) exceed the
2.5 V threshold (only TDA 16846-2, TDA 16847-2).
Figure 4
14
will be less than 100 A. The chip is not active (off state) and driver output (Pin 13)
V
Functional Description
ON
Startup Circuit
) the chip starts working and
V
R
V
OFF
2
ON
of the “Primary Current Simulation” (see later) and the internal diode
) the chip starts again from its initial condition. Figure 4 shows the
) of the Supply Voltage Comparator (SVC), then the input current
I
8
14
increases. When
V
14
V
during start up. Charging of
14
at Pin 14 (
V
14
exceeds the upper SVC
V
TDA 16846/16846-2
TDA 16847/16847-2
C
14
14
V
falls below the lower
CC
delivers the supply
) is less than the
31 Jul 2003
C
14
is