tea1753lt NXP Semiconductors, tea1753lt Datasheet - Page 8

• Manufacturer Part Number: tea1753lt
• Description: Tea1753lt Greenchip Iii Smps Control Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TEA1753LT
Objective data sheet
7.1.2 Power down
For very low standby power applications the power-down mode can be activated by
pulling the VINSENSE pin below the V
switching and the safe restart protection will be activated. Because the high voltage
start-up current source is also disabled during power-down, the TEA1753LT will 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 will draw 16 A from the HV pin for biasing.
Fig 4.
PROTECTION
PFCDRIVER
PFCSENSE
PFCCOMP
VINSENSE
FBDRIVER
VOSENSE
FBSENSE
FBCTRL
LATCH
Start-up sequence, normal operation and restart sequence
V
I
V
HV
CC
O
charging VCC
All information provided in this document is subject to legal disclaimers.
capacitor
Rev. 01 — 4 March 2011
converters
starting
soft start
operation
normal
th(powerdown)
soft start
protection
level. The TEA1753LT will stop
GreenChip III SMPS control IC
restart
TEA1753LT
© NXP B.V. 2011. All rights reserved.
V
V
V
V
V
V
V
V
en(PFCCOMP)
startup
th(UVLO)
trip
start(VINSENSE)
en(LA TCH)
to(FBCTRL)
start(fb)
014aaa744
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