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TDA9113 View Datasheet(PDF) - STMicroelectronics

Part Name
Description
MFG CO.
'TDA9113' PDF : 50 Pages View PDF
TDA9113
condition for the reset of the R-S flip-flop, OR-ed
with the one described before, is that the voltage
on pin BISense exceeds the voltage VC1, which
depends on the voltage applied on input BISense
of the error amplifier O1. The two voltages are
compared, and the reset signal generated by the
comparator C1. The error amplifier amplifies (with
a factor defined by external components) the dif-
ference between the input voltage proportional to
DC/DC convertor output voltage and internal refer-
ence VBReg.
put voltage
The internal
is I2C bus
reference and
adjustable by
so the out-
means of
BREF I2C bus control.
Both step-up (DC/DC converter output voltage
higher than its input voltage) and step-down (out-
put voltage lower than input) are possible.
DC/DC controller Off-to-On edge timing
BOutPh BOHEdge
Timing of Off-to-On transition
(Sad07/ (Sad17/
on BOut output
D7)
D3)
0
don’t care Middle of H-flyback plus tBTrigDel
1
0
Falling edge of H-drive signal
1
1
Rising edge of H-drive signal
Figure 15. DC/DC converter controller block diagram
BOHEdge
(I2C) BOutPh
(I2C)
H-drive edge
Monostable
~500ns
H-flyback
(+delay)
I1
VCC
VBReg
Feedback
+
-O1
BRegIn
BComp
VThrBIsCurr
2R R VC1 -
C1
+
-
+ C2
Soft start
I2
N type
S
Q
R
P type
I3
BOutPol
(I2C)
HBOutEn
XRayAlarm
(I2C)
BOut
HPosF
BIsense
37/50
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