Power Innovations TISP61089P, TISP61089DR, TISP61089D Datasheet

PROGRAMMABLE SLIC OVERVOLTAGE PROTECTION FOR LSSGR ‘1089

device symbol

Terminals K1, K2 and A correspond to the alternative

line designators of T, R and G or A, B and C. The

negative protection voltage is controlled by the voltage,

GG,

applied to the G

terminal.

SD6XAE

AK1G

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

●

Dual Voltage-Programmable Protectors

- Wide 0 to -85 V Programming Range

- Low 5 mA max. Gate Triggering Current

- High 150 mA min. Holding Current

●

Rated for LSSGR ‘1089 Conditions

WAVE SHAPE

2/10 µs 4.5.8 Second-Level 1 120

10/1000 µs 4.5.7 First-Level 3 30

‘1089 TEST CLAUSE

AND TEST #

TISP61089

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS

PROGRAMMABLE OVERVOLTAGE PROTECTORS

D PACKAGE

(TOP VIEW)

TSP

Tip

Gate

NC K2

Rin

Terminal t

NC - No internal connection

1 2 3 45

pical application names shown in

parenthesis

Tip

7 6

A A K2

Ground Ground Rin

MD6XAN

60 Hz POWER

FAULT TIME

100 ms 4.5.13 Second-Level 2 11

1 s 4.5.13 Second-Level 2 4.5

5 s 4.5.13 Second-Level 2 2.4 300 s 4.5.13 Second-Level 1 0.95 900 s 4.5.13 Second-Level 1 0.93

●

2/10 Protection Voltage Specified

ELEMENT

Diode 6 8

Crowbar

= -48 V

●

Also Rated for ITU-T 10/700 impulses

●

Surface Mount and Through-Hole Options

‘1089 TEST CLAUSE

AND TEST #

FIRST-LEVEL

V @ 56 A

-57 -60

TSM

SECOND-LEVEL

V @ 100 A

P PACKAGE

(TOP VIEW)

Tip Gate

Rin

Terminal t

NC - No internal connection

pical application names shown in

parenthesis

8 7

A A

Tip Ground

Ground Rin

MD6XAV

- TISP61089P for Plastic DIP

- TISP61089D for Small-Outline

- TISP61089DR for Small-Outline Taped and Reeled

description

The TISP61089 is a dual forward-conducting buffered p-gate overvoltage protector. It is designed to protect monolithic SLICs (Subscriber Line Interface Circuits) against overvoltages on the telephone line caused by lightning, a.c. power contact and induction. Th e TISP61089 limits voltages that exceed the SLIC supp ly rail voltage. The TISP61089 parameters are specified to allow equipment compliance with Bellcore GR-1089-CORE, Issue 1.

The SLIC line driver section is typically powered from 0 V (ground) and a negative voltage in the region of

-10 V to -75 V. The protector gate is connected to this negative supply. This references the protection (clipping) voltage to the ne gative supply voltage. As the pro tectio n voltage wil l then track the nega tive supply voltage the overvoltage stress on the SLIC is minimised.

Positive overvoltages are cl ipped to ground by diode forward condu ction. Negative overvoltages are i nitially clipped close to the SLIC negative supply rail value. If sufficient current is available from the overvoltage, then

PRODUCT INFORMATION

Information is current as of publication date. Products conform to specifications in accordance with the terms of Power Innovations standard warranty. Production processing does not necessarily include testing of all parameters.

TISP61089 DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS

NOVEMBER 1995 - REVISED FEBRUARY 1998

the protector will c rowbar int o a low voltage on-s tate cond ition. As the overvoltage subs ides the high holdi ng current of the crowbar prevents d.c. latchup.

The TISP61089 is intended to be used with a series combination of a 25Ω or higher resistance and a suitable overcurrent protector. Power fault compliance requires the series overcurrent element to open-circuit or become high impedance (see Applications Information). For equipment compliant to ITU-T recommendations K20 or K21 only, the series resistor value is set by the power cross requirements. For K20 and K21, a minimum series resistor value of 10Ω is recommended.

These monolithic protection devices a re fabricated in ion-impla nted planar ver tical power structures for high reliability and in normal system operation they are virtually transparent. The TISP61089 buffered gate design reduces the loading on the SLIC supply during overvoltages caused by power cross and induction. The TISP61089 is available in 8-pin plastic small-outline surface mount package and 8-pin plastic dual-in-line package.

absolute maximum ratings

RAT ING SYMBOL VALUE UNIT

≤

Repetitive peak off-state voltage, I Repetitive peak gate-cathode voltage, V Non-repetitive peak on-state pulse current (see Notes 1 and 2)

10/1000 µs (Bellcore GR-1089-CORE, Issue 1, November 1994, Section 4) 5/320 µs (ITU-T recommendation K20 & K21, open-circuit voltage wave shape 10/700)

1.2/50 µs (Bellcore GR-1089-CORE, Issue 1, November 1994, Section 4, Alternative) 100 2/10 µs (Bellcore GR-1089-CORE, Issue 1, November 1994, Section 4) 120

Non-repetitive peak on-state current, 60 Hz (see Notes 1 and 2)

0.1 s 11 1s

5s 300 s

900 s Non-repetitive peak gate current, 1/2 µs pulse, cathodes commoned (see Notes 1 and 2) I Operating free-air temperature range T Junction temperature T Storage temperature range T

= 0, -40°C≤T

85°C V

≤

85°C V

DRM

GKRM

TSP

TSM

GSM

stg

-100 V

-85 V

30 40

4.5

2.4

0.95

0.93 40 A

-40 to +85 °C

-40 to +150 °C

NOTES: 1. Initially the protector must be in thermal equilibrium with -40°C≤T

its initial conditions.

2. The rated current values may be applied either to the Ring to Ground or to the Tip to Ground ter minal pairs. Additionally, both terminal pairs may have thei r rated current values applied simultaneously (in this case the Ground terminal current will be twice the rated current value of an individual terminal pair). Above 85°C, derate linearly to zero at 150°C lead temperature.

recommended operating conditions

Gate decoupling capacitor 100 220 nF

TISP61089 series resistor for first-level and second-level surge survival

TISP61089 series resistor for first-level surge survival

PRODUCT INFORMATION

≤

85°C. The surge may be repeated after the device returns to

MIN TYP MAX UNIT

40 25

Ω

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS

PROGRAMMABLE OVERVOLTAGE PROTECTORS

electrical characterist ics, TJ = 25°C (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

GAS

V Q

(BO)

FRM

Off-state current VD=-85V, VGK=0

Ω,

VGG=-48V, CG= 220 nF

Ω,

VGG=-48V, CG= 220 nF

Ω,

VGG=-48V, CG= 220 nF

Ω,

VGG=-48V, CG= 220 nF

Breakover voltage

2/10 µs, I 2/10 µs, I

1.2/50 µs, I

= -56 A, RS=45

= -100 A, RS=50

=-53A, RS=47

=-96A, RS=52

Forward voltage IF= 5 A, tw= 200 µs 3V

Ω,

VGG=-48V, CG= 220 nF

Ω,

VGG=-48V, CG= 220 nF

Ω,

VGG=-48V, CG= 220 nF

Ω,

VGG=-48V, CG= 220 nF

Peak forward recov ery voltage

2/10 µs, I 2/10 µs, I

1.2/50 µs, I

=56A, RS=45

= 100 A, RS=50

=53A, RS=47

=96A, RS=52

Holding current IT= -1 A, di/dt = 1A/ms, VGG= -48 V -150 mA

Gate reverse current VGG=VGK=-75V, VKA=0

≥

Gate trigger current IT= 3 A, t Gate trigger voltage IT= 3 A, t

p(g) p(g)

20 µs, V

≥

20 µs, V

=-48V 5 mA

=-48V 2.5 V

Gate switching charge 1.2/50 µs, IT=53A, RS=47Ω, VGG= -48 V CG= 220 nF 0.1 µC Anode-cathode off-

state capacitance

f=1MHz, V

=1V, IG= 0, (see Note 3)

T T

V V

TISP61089

NOVEMBER 1995 - REVISED FEBRUARY 1998

= 25°C -5 µA

= 85°C -50 µA

-57

-60

-64

6 8 8

= 25°C -5 µA

= 85°C -50 µA

= -3 V 100 pF

=-48V 50 pF

NOTE 3: These capacitance mea surements employ a three terminal capacitance bridge incorporating a guard circuit. The unmeasured

device terminals are a.c. connected to the guard terminal of the bridge.

thermal characteristics

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

=0.8W, TA= 25°C

Junction to free air thermal resistance

tot

5cm

, FR4 PCB

D Package 160 P Package 100

°C/W

PRODUCT INFORMATION

TISP61089 DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS

NOVEMBER 1995 - REVISED FEBRUARY 1998

PARAMETER MEASUREMENT INFORMATION

-v

(BO)

Quadrant III

Switching

Characteristic

(BO)

GK(BO)

(= |I

TSP

FSP

Characteristic

(= |I

FSM

TSM

TSP

-i

Quadrant I

Forward

Conduction

PM6XAAA

Figure 1. VOLTAGE-CURRENT CHARACTERISTIC

PRODUCT INFORMATION

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS

PROGRAMMABLE OVERVOLTAGE PROTECTORS

NOVEMBER 1995 - REVISED FEBRUARY 1998

THERMAL INFORMATION

PEAK NON-RECURRING A.C.

CURRENT DURATION

RING AND TIP CONNECTIONS -

applied simultaneously to both

TSM

GROUND CONNECTION Return current is twice I

GEN

VG = -48 V, T

TSM

= 600 Vrms = 70 to 950

AMB

TI6LACA

Ω

= 85°C

TISP61089

- Peak Non-Recurrent 60 Hz Current - A

TSM

0·1 1 10 100 1000

t - Current Duration - s

ure 2. NON-REPETITIVE PEAK ON-STATE CURRENT AGAINST DURATION

APPLICATIONS INFORMATION

gated protectors

This section covers three topics. Firstly, it is explained why gated protectors are needed. Second, the voltage limiting action of the protector is described. Third, an example application circuit is described.

purpose of gated protectors

Fixed voltage thyristor overvoltage protectors have been used si nce the early 1980s to protect mo nolithic SLICs (Subscriber Line Interface Circuits) against overvoltages on the telephone line caused by lightning, a.c. power contact and induction. As the SLIC was usuall y powered from a fixed voltage negative supply rail, the limiting voltage of the protector could als o be a fixed value. The TISP1072F3 is a typical example of a fixed voltage SLIC protector.

SLICs have become more sophisticated. T o minimise power consumption, some designs automatically adjust the supply voltage, V supply voltage would be set low, but for long lines, a higher supply voltage would be generated to drive sufficient line curren t. The optimum protection for this type of SLIC would be given by a protection voltage which tracks the SLIC supply voltage. This can be achieved by connecting the protection thyr istor ga te t o the SLIC supply, Figure 3. This gated (programmable) protection arrangement minimises the voltage stress on the SLIC, no matter what value of supply voltage.

, to a value that is just sufficient to drive the requir ed line cu rrent. For shor t line s the

BAT

PRODUCT INFORMATION

TISP61089

)

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS

NOVEMBER 1995 - REVISED FEBRUARY 1998

TIP

WIRE

Ω

600

GENERATOR

SOURCE

RESISTANCE

Ω

600

A.C.

GENERATOR

0 - 600 Vrms

ure 3. TISP61089 BUFFERED GATE PROTECTOR (SECTION 4.5.12 TESTING CONDITION

RING

WIRE

R1a

>25

R1b

>25

Ω

TISP61089

Th4

Th5

220 nF

SLIC

SWITCHING MODE

POWER SUPPLY

SLIC

BAT

AI6XAG

operation of gated protectors

Figures 4. and 5. show how the TISP61089 limits neg ative and positive overvoltages. Positive overvoltages (Figure 5) are clipped by the antiparallel diodes in th e TISP61089 and the resulting current is diver ted to ground. Negative overvoltages (Figure 4.) are initially clipped clos e to the SLIC negative supply rail value

). If sufficient curren t is available from the overvoltage, then the protector (Th5) wil l crowbar into a low

BAT

voltage on-state conditio n. As the overvoltage sub sides th e high holdin g current o f th e crowbar prevents d.c. latchup. The protection voltage will be th e sum of t he gate su pply (V (V

). The protection voltage will be i nc reas ed if th er e is a l ong c on necti on bet ween t he gat e d ec oup li ng

GK(BO)

capacitor, C1, and the gate terminal. During the in iti al rise of a fast impulse, the gat e c ur rent (I as the cathode current (I

). Rates of 70 A/µs can cause inductive voltages of 0.7 V in 2.5 cm of printed wiring

) and the peak gate-c athode voltage

BAT

) is the same

track. To minimi se this inductive voltage increase of protection voltage, the length of the c apacitor to gate terminal tracking should be minimised. Inductive voltages in the protector cathode wiring will also increase the protection voltage. These voltages can be minimised by routing the SLIC connection through the protector as shown in Figure 3.

PROTECTOR

CROWBAR

OPERATION

61089

Th5

TISP

220 nF

SLIC

BAT

AI6XAH

PROTECTOR

DIODE

OPERATION

61089

Th5

TISP

220 nF

SLIC

BAT

AI6XAI

Figure 4. NEGATIVE OVERVOLTAGE CONDITION Figure 5. POSITIVE OVERVOLTAGE CONDITION

PRODUCT INFORMATION

+ 11 hidden pages