TISP61089 查看數據表（PDF） - Power Innovations

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TISP61089

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS

Power Innovations 

TISP61089

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS

PROGRAMMABLE OVERVOLTAGE PROTECTORS

NOVEMBER 1995 - REVISED FEBRUARY 1998

TIP

WIRE

OVER-

CURRENT

PROTECTION

R1a

RING/TEST

PROTECTION

Th1

Th3

TEST

RELAY

S1a

RING

RELAY

SLIC

RELAY

S3a

S2a

SLIC

PROTECTOR

Th4

SLIC

R1b

RING

WIRE

Th2

TISP

3xxxF3

OR

S1b

S2b

7xxxF3

Th5

S3b

TISP

61089

C1

VBAT

220 nF

TEST

EQUIP-

MENT

RING

GENERATOR

Figure 7. TYPICAL APPLICATION CIRCUIT

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Relay contacts 3a and 3b connect the line conductors to the SLIC via the TISP61089 protector. The protector

gate reference voltage comes from the SLIC negative supply (VBAT). A 220 nF gate capacitor sources the

high gate current pulses caused by fast rising impulses.

LSSGR 1089

GR-1089-CORE, “1089”, covers electromagnetic compatibility and electrical safety generic criteria for US

network telecommunication equipment. It is a module in Volume 3 of LSSGR (LATA (Local Access Transport

Area) Switching Systems Generic Requirements, FR-NWT-000064). In 1089 surge and power fault immunity

tests are done at two levels. After first-level testing the equipment shall not be damaged and shall continue to

operate correctly. Under second level testing the equipment shall not become a safety hazard. The equipment

is permitted to fail as a result of second-level testing. When the equipment is to be located on customer

premises, second-level testing includes a wiring simulator test, which requires the equipment to reduce the

power fault current below certain values.

The following clauses reference the 1089 section and calculate the protector stress levels. The TISP61089 is

specified for use with a 40 Ω series resistor. This resistor value will ensure that the TISP61089 survives

second level surge testing. Values down to 25 Ω may be used if some second level surge failure is

acceptable. All the tabulated values are for a series resistance of 40 Ω. Peak current values for a 25 Ω series

resistor are covered in the clause text.

The values of protector current are calculated from the open circuit generator voltage divided by the sum of

the total circuit resistance. The total circuit resistance is the sum of the generator fictive source resistance and

the TISP61089 series resistor value. Most generators have multiple outputs and each output connects to an

individual line conductor. For those generators that have a single output, each conductor will have an effective

generator fictive source resistance of n times the generator fictive source resistance, where n is the number of

conductors simultaneously tested.

PRODUCT INFORMATION

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