Texas Instruments TPS92310-12 Evaluation Module TPS92310-12FB/NOPB TPS92310-12FB/NOPB Ficha De Dados
Códigos do produto
TPS92310-12FB/NOPB
V
CC
V
SW
V
ZCD
V
ZCD-ARM
V
ZCD-OVP
V
LED
25.6V
13V
Steady
state
Disconnect LED
Steady
state
I
LED
Reconnect LED
Force output short circuit
Steady
state
Startup
state
Low Freq state
Steady state
OV state
Startup
state
Steady
state
Low
Freq
state
Startup
state
Startup
state
SNVS792 – FEBRUARY 2012
Over Current Protection
The Over Current Protection (OCP) limits the drain current of the external MOSFET Q1 and prevent inductor /
transformer saturation. When V
transformer saturation. When V
ISNS
reaches a threshold, the OCP is triggered and the output of the GATE pin is
low immediately. The threshold is typically 3.4V and 0.64V when the TPS92310 is using an isolated topology and
a non-isolated topology respectively.
a non-isolated topology respectively.
Thermal Protection
Thermal protection is implemented by an internal thermal shutdown circuit, which activates at 160°C (typically) to
shut down the TPS92310. In this case, the GATE pin outputs low to turn off the external MOSFET, and hence no
power from the VAUX winding to V
shut down the TPS92310. In this case, the GATE pin outputs low to turn off the external MOSFET, and hence no
power from the VAUX winding to V
CC
. Capacitor C
VCC
will discharge until UVLO. When the junction temperature
of the TPS92310 falls back below 130°C, the TPS92310 resumes normal operation.
Figure 20. Auto Restart Operation
12
Copyright © 2012, Texas Instruments Incorporated
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