TISP61089SDR View Datasheet(PDF) - Power Innovations

Part Name

Description

MFG CO.

TISP61089SDR

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS

Power Innovations 

Prev 11 12 13 14 15 16

TISP61089S

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS

PROGRAMMABLE OVERVOLTAGE PROTECTORS

JULY 1999

after the test has ended. The test current levels and their duration are shown in Figure 8. First level tests have

a high source resistance and the current levels are not strongly dependent on the TISP61089S series resistor

value.

Second level tests have a low source resistance and the current levels are dependent on the TISP61089S

series resistor value. The two stepped lines at the top of Figure 8 are for the 25 Ω and 40 Ω series resistor

cases. If the full current-time durations occur the equipment will fail the wiring simulator test. The MDQ 1-6/

10A fusing characteristic is also shown in Figure 8. The TISP61089S series overcurrent protection must

operate before the MDQ 1-6/10A fuses, so this represents another boundary condition in the selection of the

overcurrent protector.

MAXIMUM RMS CURRENT

vs

TIME

AI6XAK

30

20

Second Level Tests - 25 Ω

10

7

Second Level Tests - 40 Ω

5

3

2

MDQ 1-6/10A Fuse

1

0.7

0.5

0.3

0.2

First Level Tests - 25 & 40 Ω

0.1

0.01

0.1

1

10

Time - s

100

1000

Figure 8. ‘1089 MAXIMUM TEST CURRENT LEVEL

Figure 9 summarises these boundary conditions. The highest current levels that can flow are influenced by

the TISP61089S series resistance. After one second the maximum current-time boundary becomes set by

the MDQ 1-6/10A fusing characteristic. Fusible overcurrent protectors cannot operate at first level current

levels.

Figure 9 shows two other curves. The lower one is the TISP61089S rated current. The overcurrent protector

should not allow current-time durations greater than this otherwise the TISP61089S may fail. If second level

failure is acceptable then the overcurrent protector must operate before the TISP61089S package limit is

reached.

The TISP61089S a.c. ratings are worse case values when the device is mounted on the minimal sized PCB

used for measuring thermal resistance. Typical PCBs would give a 25% increase in the rated currents for

periods above 0.1 s.

PRODUCT INFORMATION

13

Share Link: