TPD4105AK_07 TOSHIBA [Toshiba Semiconductor], TPD4105AK_07 Datasheet - Page 12

• Manufacturer Part Number: TPD4105AK_07
• Description: High Voltage Monolithic Silicon Power IC
• Manufacturer: TOSHIBA [Toshiba Semiconductor]

Description of Protection Function
Safe Operating Area
Note 1: The above safe operating areas are at Tj = 135°C (Figure 1).
(2)
(1)
2.7
3
0
0
This product incorporates under voltage protection circuits to prevent the IGBT from operating in
unsaturated mode when the V
When the V
outputs shut down regardless of the input. This protection function has hysteresis. When the V
power supply reaches 0.5 V higher than the shutdown voltage (V
is automatically restored and the IGBT is turned on again by the input.
When the V
When the V
typ.)), the IGBT is turned on again by the input signal.
This product incorporates a thermal shutdown circuit to protect itself against excessive rise in
temperature.When the temperature of this chip rises to the internal setting TSD due to external
causes or internal heat generation all IGBT outputs shut down regardless of the input. This
protection function has hysteresis ΔTSD (= 50 °C typ.). When the chip temperature falls to TSD −
ΔTSD, the chip is automatically restored and the IGBT is turned on again by the input.
Because the chip contains just one temperature-detection location, when the chip heats up due to the
IGBT, for example, the differences in distance between the detection location and the IGBT (the
source of the heat) can cause differences in the time taken for shutdown to occur. Therefore, the
temperature of the chip may rise higher than the initial thermal shutdown temperature.
Thermal shutdown
Under-voltage protection
Power supply voltage V
Figure 1 SOA at Tj = 135°C
CC
BS
BS
supply voltage drops V
supply voltage reaches 0.5 V higher than the shutdown voltage (V
power supply falls to this product internal setting V
BB
CC
400
(V)
voltage or the V
450
BS
UVD (=9 V typ.), the high-side IGBT output shuts down.
12
BS
voltage drops.
CC
CC
UVR (=11.5 V typ.)), this product
UVD (=11 V typ.), all IGBT
TPD4105AK
BS
UVR (=9.5 V
2007-05-10
CC