tea1713lt NXP Semiconductors, tea1713lt Datasheet - Page 6

• Manufacturer Part Number: tea1713lt
• Description: Resonant Power Supply Control Ic With Pfc
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TEA1713LT
Product data sheet
7.2.1 Low-voltage supply input (pin SUPIC)
7.2 Power supply
The TEA1713LT contains several supply related pins.
The SUPIC pin is the main low-voltage supply input to the IC. All internal circuits (other
than the high voltage circuit) are directly or indirectly (via SUPREG) supplied from this pin.
SUPIC is connected externally to a buffer capacitor C
charged in several ways:
The IC starts operating when voltage on SUPIC reaches the start level, provided that the
voltage on SUPREG has also reached the start level. The start level depends on the
condition of the SUPHV pin:
The IC will stop operating when V
UnderVoltage Protection (UVP) voltage (UVP-SUPIC; see
controller will stop switching immediately, but the HBC controller will continue operating
until the low-side MOSFET becomes active.
The current consumption depends on the state of the IC. The TEA1713LT operating
states are described in
•
•
•
•
•
•
•
•
from the internal high voltage start-up source
from the auxiliary winding of the HBC transformer
from the capacitive supply of the switching half-bridge node
from an external DC supply, e.g. a standby supply
High voltage present on SUPHV, V
This is the case with a stand-alone application where C
the HV start-up source. The start level is V
difference between the start and stop (V
the SUPIC buffer capacitor which is used to supply the IC until the output voltage has
stabilized.
Not connected or no voltage present at SUPHV, V
This is the case when the TEA1713LT is supplied from an external DC source. The
start level is V
during start-up. To minimize power dissipation, the DC supply to pin SUPIC should be
above, but close to, V
Disabled IC state
When the IC is disabled via the SSHBC/EN pin, the current consumption is very low
(I
SUPIC charge, SUPREG charge, Thermal hold, Restart and Protection shutdown
states
Only a small section of the IC is active while C
a restart sequence prior to start-up or during shutdown after a protection function has
been activated. The PFC and HBC controllers are disabled. Current consumption is
limited to I
dism(SUPIC)
protm(SUPIC)
).
All information provided in this document is subject to legal disclaimers.
start(nohvd)(SUPIC)
Section
Rev. 1 — 24 June 2011
.
uvp(SUPIC)
7.3.
SUPIC
(typ. 17 V). The IC is supplied from the DC supply
(typ. 15 V).
SUPHV
drops below V
Resonant power supply control IC with PFC
uvp(SUPIC)
> V
start(hvd)(SUPIC)
det(SUPHV)
SUPIC
) levels allows energy to be stored in
SUPIC
uvp(SUPIC)
SUPHV
and C
.
Section
. This buffer capacitor can be
SUPIC
< V
(typ. 22 V). The wide
SUPREG
. This is the SUPIC
det(SUPHV)
TEA1713LT
is initially charged from
7.9). The PFC
are charging during
© NXP B.V. 2011. All rights reserved.
.
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