TA8053 데이터 시트보기 (PDF) - Toshiba
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TA8053 Datasheet PDF : 10 Pages
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TA8053H
3. Overcurrent protections (ISD)
• Basic operation
When the output current (pin 5 or 9, I sink or I source) is up to the ISD detection current, the output is
controlled by the input signals. When it exceeds the detection current, the output assumes a switching
waveform as shown in Fig.1.
Fig.1 Basic Operation
• Detailed explanation
The output current is detected by monitoring the VBE from each output transistor. One detection circuit
connects to one of the output transistors and leads to the short-circuit protection circuit. When a current
exceeding the ISD detection current flows through one of the four output transistors, the short-circuit
protection circuit is activated. This circuit contains a timer. When over-current condition continues for
20µs (typically), the protection circuit places the output in high-impedance mode and, 80µs (typically) later,
returns the IC to ON mode. The switching-waveform output is repeated until over-current condition is no
longer present.
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC
Power Supply Voltage
Input Voltage
Output Current
Operation Temperature
Storage Temperature
Power Dissipation
Lead Temperature Time
SYMBOL
VCC
VCC
VIN
IO AVE
Topr
Tstg
PD
Tsol
RATING
30
60 (1s)
−0.3~VCC
3.0
−40~110
−55~150
25
260 (10s)
UNIT
V
V
A
°C
°C
W
°C
4
2002-01-30
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