TEA1753T 데이터 시트보기 (PDF) - NXP Semiconductors.

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TEA1753T

HV start-up DCM/QR flyback controller with integrated DCM/QR PFC controller

NXP Semiconductors. 

NXP Semiconductors

TEA1753T

HV start-up flyback controller with integrated PFC controller

IHV

VCC

VINSENSE

Vstartup

Vth(UVLO)

Vtrip

Vstart(VINSENSE)

PFCCOMP

LATCH

PROTECTION

PFCSENSE

PFCDRIVER

FBSENSE

soft start

soft start

Ven(PFCCOMP)

Ven(LA TCH)

FBDRIVER

FBCTRL

Vto(FBCTRL)

VOSENSE

VO

charging VCC

capacitor

starting

normal

converters operation

protection

restart

Fig 4. Start-up sequence, normal operation and restart sequence

Vstart(fb)

014aaa744

7.1.2 Power down

The power-down mode is activated for very low standby power applications by pulling the

VINSENSE pin below the Vth(pd) level. The TEA1753T stops switching and the safe restart

protection is activated. The high-voltage start-up current source is also disabled during

power-down, so the TEA1753T does not restart until the VINSENSE pin voltage is raised

again. During power down all internal circuitry is disabled except for a voltage detection

circuit on the VINSENSE pin. This circuit is supplied by the HV pin and draws 16 A from

the HV pin for biasing.

If the VINSENSE pin is pulled low, a latched protection is also reset (see Section 7.1.5).

TEA1753T

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 3. — 24 August 2012

© NXP B.V. 2012. All rights reserved.

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