tpd4134ak TOSHIBA Semiconductor CORPORATION, tpd4134ak Datasheet - Page 12

• Manufacturer Part Number: tpd4134ak
• Description: High Voltage Monolithic Silicon Power Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Description of Protection Function
Timing Chart of Under voltage protection and SD Function
Safe Operating Area
Note 1: The above safe operating areas are Tj = 135 °C (Figure 1).
SD
LIN
HIN
V
V
LO
HO
DIAG
BS
CC
(1)
(2)
(3)
Note: The above timing chart is considering the delay time.
This product incorporates under voltage protection circuits to prevent the IGBT from operating in
unsaturated mode when the V
When the V
shut down regardless of the input. This protection function has hysteresis. When the V
reaches 0.5 V higher than the shutdown voltage (V
restored and the IGBT is turned on again by the input. DIAG output is reversed at the time of V
under-voltage protection. When the V
reversed.
When the V
When the V
the IGBT is turned on again by the input signal.
This product incorporates a thermal shutdown circuit to protect itself against the abnormal state when
its temperature rises excessively.
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 from the detection location in the IGBT (the source of the
heat) cause differences in the time taken for shutdown to occur. Therefore, the temperature of the chip
may rise higher than the thermal shutdown temperature when the circuit started to operate.
SD pin is the input signal pin to shut down the internal output IGBT. Output of all IGBT is shut down
after delay times (2 μs typ.) when "L" signal is input to the SD pin from external circuit (MCU etc.). It is
possible to shut down IC when overcurrent and others is detected by external circuit. Shut down state is
released by all of IC input signal "L". At open state of SD pin, shut down function can not operate.
Under voltage protection
Thermal shutdown
SD pin
1.9
2
0
0
Power supply voltage V
Figure 1 SOA at Tj = 135 °C
t
on
BS
CC
BS
supply voltage drops V
power supply falls to this product internal setting V
supply voltage reaches 0.5 V higher than the shutdown voltage (V
t
off
t
on
BB
400
CC
(V)
t
voltage or the V
off
450
BS
CC
UVD (=9 V typ.), the high-side IGBT output shuts down.
power supply is less than 7 V, DIAG output isn't sometimes
12
BS
CC
voltage drops.
UVR (=11.5 V typ.)), this product is automatically
CC
UVD (=11 V typ.), all IGBT outputs
BS
UVR (=9.5 V typ.)),
TPD4134AK
CC
2010-09-27
power supply
CC