TEA2164 查看數據表（PDF） - STMicroelectronics

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TEA2164

SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT

STMicroelectronics 

TEA2164

ELECTRICAL OPERATING CHARACTERISTICS (continued)

Symbol

Parameter

OSCILLATOR, MAX DUTY CYCLE, SYNCHRONIZATION (continued)

Tsyn

Synchronization Window

TO

OUTPUT STAGE

I14/I2

IBON

Ic Copy Current Gain

Base Current Starting Pulse

VERY LOW FREQUENCY OSCILLATOR

Burst Duty Cycle

Min. Typ. Max. Unit

1.0

1.5

1000

300

mA

13

%

I. FIELD OF APPLICATION

The TEA2164 control circuit has been designed

primarily for discontinuous mode flyback built with

a master-slave architecture, whatever the field of

application.

But due to its capability to synchronize the transis-

tor switching-off with an external signal (line fly-

back) and due to an adaptedburst-mode operation

for a low power stand-by operation, the TEA2164

offers a smart solution for monitors and TV sets

applications.

Power supply main features :

- maximum output power 140W (transistor forced

gain : 3.5)

Figure 2 : Master Slave Power Supply Architecture

- stand-by mode output power (1W ≤ Psb ≤ 6W ;

efficiency > 50%)

- operating frequency up to 50kHz

- power-switch : bipolar transistor

Adapted master-circuit :

Monitor application

→

Standard TV application →

Digital TV application →

TEA5170

TEA2028B

TEA2029C

TEA2128

TEA5170

TEA5170

(TEA2028B, TEA2029C and TEA2128 are deflec-

tion processors with built-in PWM generator).

AUD IO

OUTP UT

STAGE

Muting

Control

MAINS

INPUT

R

P2

C

V CC

TEA2164

P1

Synchronization

SCANNING

DEVICE

Remote

Stand-by

VO LTAGE

R EGULATOR

Remote

Stand-by

TEA5170

µP

PWM

VCC

INFRA-RED

RECEIVER

P1 : Output voltage adjustement in normal mode

P2 : Output voltage adjustement in s tand-by

Small signal primary ground

Power primary ground

Secondary ground (isolated from mains)

5/15

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