SP000081008 Infineon Technologies, SP000081008 Datasheet - Page 14

• 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
Fixed Frequency and Synchronization Circuit SYN (Pin 7)
Figure 11 shows the Fixed Frequency and Synchronization Circuit. The circuit is
disabled when Pin 7 is not connected or connected to pin 9 (Vref, to avoid noise
sensitivity). With
1 mA and discharged slowly by
beginning of the charge phase. The switching frequency is (charge time ignored)
:
When the oscillator circuit is working the Fold Back Point Correction is disabled (not
necessary in fixed frequency mode). “Switch on” is only possible when a “zero crossing”
has occurred at Pin 3, otherwise “switch-on” will be delayed (Figure 12).
Figure 11
Synchronization and Fixed Frequency Circuit
R
7
and
C
7
at Pin 7 the circuit is working.
R
7
(Figure 11). The power transistor is switched on at
f
--------------
R
7
0 8
14
,
C
7
C
7
is charged fast with approx.
TDA 16847/16847-2
TDA 16846/16846-2
31 Jul 2003