STK681-360-E

No. A2265-9/12

1.Substrate temperature rise

Tc-Internal average power loss PdAV characteristics (no heat sink)

0

10

20

30

40

50

60

70

80

00.5

11.5

22.5

3

3.5

Hybrid IC internal average power loss, PdAV - W

Substrate temperature rise, Tc (no heat sink) - Internal average power

dissipation, PdAV

2. Average internal power loss (Pd) at DC - motor current (Io) characteristics.

0

0.5

1

1.5

2

2.5

3

3.5

00.5

11.5

22.5

33.5

44.5

55.5

6

Moter current Io(DC) A

STK681-360-E Average internal power loss Pd vs moter Io

High side loss

Low side loss

Vcc1=24v

Vcc2=5.0v

3. Over temperature current suppression characteristics: Io – Tc.

0.0

1.0

2.0

3.0

4.0

5.0

0

102030405060708090

100

110

120

Operating substrate temperture Tc °C

STK681-360-E Over temperature current suppression characteristics

Io vs Tc < Load:2Ω + 5mH>

The over temperature current suppression function protects the driver from destruction when

an abnormal motor locked (physically constrained) state occurs.