tea1753lt NXP Semiconductors, tea1753lt Datasheet - Page 7

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

NXP Semiconductors
TEA1753LT
Objective data sheet
As soon as the flyback converter is started, the voltage on the FBCTRL pin is monitored. If
the output voltage of the flyback converter does not reach its intended regulation level
within a predefined time, the voltage on the FBCTRL pin reaches the V
error is assumed and a latched protection is initiated.
When one of the protection functions is activated, both converters stop switching and the
V
HV pin, but does not restart the converters. For a safe restart protection, the capacitor is
recharged via the HV pin and the device restarts (see block diagram,
In the event of an overvoltage protection of the PFC circuit, V
only the PFC controller stops switching until the VOSENSE pin voltage drops below
V
V
V
When the voltage on pin V
stop switching and reenter the safe restart mode. In the safe restart mode the driver
outputs are disabled and the V
CC
OVP(VOSENSE)
VINSENSE
VINSENSE
voltage drops to V
< V
> V
stop(VINSENSE)
start(VINSENSE)
again. Also, if a mains undervoltage is detected
All information provided in this document is subject to legal disclaimers.
th(UVLO)
Rev. 01 — 4 March 2011
CC
, only the PFC controller stops switching until
again.
drops below the undervoltage lockout level, both controllers
. A latched protection recharges the capacitor C
CC
pin voltage is recharged via the HV pin.
GreenChip III SMPS control IC
VOSENSE
TEA1753LT
Figure
> V
to(FBCTRL)
© NXP B.V. 2011. All rights reserved.
OVP(VOSENSE)
1).
VCC
level, an
via the
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,