TEA1751LT/N1 NXP Semiconductors, TEA1751LT/N1 Datasheet - Page 6

• Manufacturer Part Number: TEA1751LT/N1
• Description: AC-DC, PFC, FLYBACK, CNTRL, 16SOIC
• Manufacturer: NXP Semiconductors

Specifications of TEA1751LT/N1

• Input Voltage: 276V
• Output Current: 1.2A
• Output Voltage: 11V
• No. Of Outputs: 2
• Power Dissipation Pd: 600mW
• Voltage Regulator Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: -40°C To
• Supply Voltage Range: 21V To 23V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
TEA1751T_LT_2
Product 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 in a
predefined time, the voltage on the FBCTRL pin reaches the V
is assumed. The TEA1751 then initiates a safe restart, while in the TEA1751L the
protection is latched.
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
Rev. 02 — 23 December 2009
th(UVLO)
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.
TEA1751T; TEA1751LT
GreenChip III SMPS control IC
VOSENSE
to(FBCTRL)
Figure
> V
© NXP B.V. 2009. All rights reserved.
level and an error
ovp(VOSENSE)
1).
VCC
via the
6 of 29
,