TEA1501T 查看數據表（PDF） - Philips Electronics

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TEA1501T

GreenChip SMPS controller IC

Philips Electronics 

Philips Semiconductors

TEA1501

GreenChip SMPS controller IC

7.2 Waveforms in the Off mode, Start-up mode and Operation mode

VDRAIN

detection

VSOURCE

level

regulation

VAUX

level

Vout

VBURST

VOOD

on/off

level

off startup

operation

switch

period

switch on

time

burst on

time

burst period

mgm828

Fig 4. Waveforms of the TEA1501 in the Off mode, Start-up mode and Operation mode

7.3 Circuit block description

7.3.1 On/off/data section

The on/off/data block contains a comparator for the on/off level and is active if the drain

voltage is above 50 V (DC). The typical current consumption in Off mode is 40 µA. The

data signal changes the clamp level on the OOD pin to indicate data transfer: low clamp

level for data-off and high clamp level for data-on.

7.3.2

VAUX management

The VAUX management block is active when the TEA1501 is in the On mode. This VAUX

management block senses the AUX voltage and determines the state of the TEA1501:

start-up or normal operation. During start-up the following circuits are active: On/off/data

section, reference block (partial), VAUX management, temperature protection and the

start-up current source.

TEA1501_2

Product data sheet

Rev. 02 — 31 March 2006

© Koninklijke Philips Electronics N.V. 2006. All rights reserved.

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