A6902D View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
A6902D
STMicroelectronics
'A6902D' PDF : 33 Pages View PDF
OUT
VIN
IO
-VF
PON
Figure 10. Switching losses
VDS
A6902D
Maximum output voltage
ISWITCH
PSW
PON
TFALL
TRISE
• Quiescent current losses
(20)
PQ = VIN ∙ IQ
Where IQ is the quiescent current, with typical value 2.5 mA @ VIN = 12 V.
The resulting power losses are given by:
(21)
PTOT = PON + PSW + PQ
8.5
Maximum output voltage
The current error amplifier inputs require a biasing point at least 2 V below the VCC for proper operation, as
written in Table 4. Electrical characteristics.
Adding the expected 100 mV (typical) voltage drop between VCS+ and VCS-, the maximum output voltage that
guarantees the proper biasing point of the current sense circuitry is:
(22)
VOUT, MAX = VIN, MIN − 2.1V
The accuracy of the trimmed voltage offset (100 mV ± 5%) between the OTA inputs is not guaranteed if the
biasing point is out of specification.
To overcome the above described limitation the low-side current sensing schematic can be implemented, as
shown in figure below.
DS5503 - Rev 6
page 18/33
Share Link: 