PBL38772/1 데이터 시트보기 (PDF) - Ericsson

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PBL38772/1

Subscriber Line Interface Circuit (SLIC)

Ericsson  

PBL 387 72

RING

TIP

VTB

VB

RF1

VB

CGG

OVP

RF2

DB

DTB

DBB

PBL38772

CTB

CB

CHP

CRC

CTC

CLP

CSPR

BW

BW

BW

HP

BGND

RINGX

TIPX

VTBAT

VBAT

VTB

LP

SPR

BW

BW

VTX

RSN

AGND

VR

DET

C1

C2

C3

VCC

PLD

PRT

PLC

REF

CRING

CRING

RTX

RT

RB

RRX

RVR

SYSTEM CONTROL

INTERFACE

VR

CVR

RREF RLC RRT CRT RLD

RFB

--

0

++

0

CODEC/

Filter

VCC

CVCC

TXPCMbus

DX

DR

RXPCMbus

Figure 8. Single channel subscriber line interface with PBL 387 72/1 and Combo I type codec.

PBL 387 72/1 components

RESISTORS :

(values according to IEC-63 E96 series)

RLD

= 49.9 kΩ

1% 1/10 W

RLC

= 18.7 kΩ

1% 1/10 W

RRT

= 61.9 kΩ

1% 1/10 W @ VBAT = 80 V

RREF

= 15 kΩ

1% 1/10 W

RT

= 105 kΩ

1% 1/10 W (for 600 Ω two-

wire impedance with the RF1 and RF2 included.)

RRX

= 105 kΩ

1% 1/10 W

(The gain is set to 1)

RVR

= 200 kΩ

1% 1/10 W

RTX

= 32.4 kΩ

1% 1/10 W

RB

RFB

RF1 = RF2

= 57.6 kΩ

1% 1/10 W

= depending on codec

= Line protection resistor, 40Ω 1% match, e.g. by

Bourns TBD

CAPACITORS:

(values according to IEC-63 E6 series)

CTB

= 150 nF

100 V

CB

= 100 nF

100 V

CVCC

= 100 nF

10 V

CHP

= 33 nF

100 V

CLP

= 470 nF

100 V

CGG

= 220 nF

100 V

CRING

= 470 nF

10 V

CRT

= 10 nF

10 V

CVR

= 470 nF

10 V

20%

20%

20%

20%

20%

20%

20 %

20 %

20 %

OPTIONAL CAPACITORS:

CTC

= 1.0 nF

CRC

= 1.0 nF

CSPR

= optional

DIODES:

DB = DTB = DBB =TBD

100 V 20%

100 V 20%

10 V 20%

OVP:

Secondary protection clamp (e.g. Bourns/Power Innovations

TISP PBL3 or TISP 6NTP2A ,which serves two lines).

The ground terminals of the secondary protection should

be connected to the common ground on the Printed Board

Assembly with a track as short and wide as possible,

preferably to a ground plane.

EN/LZT 146 136 R1A © Ericsson Microelectronics, December 2001

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