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TEA1713T Datasheet(PDF) 7 Page - NXP Semiconductors

Part # TEA1713T
Description  Resonant power supply control IC with PFC
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

TEA1713T Datasheet(HTML) 7 Page - NXP Semiconductors

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TEA1713T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 9 February 2011
7 of 47
NXP Semiconductors
TEA1713T
Resonant power supply control IC with PFC
Boost charge state
The PFC controller is switching; the HBC controller is off. The current from the high
voltage start-up source is large enough to supply SUPIC (current consumption <
Ich(nom)(SUPIC)).
Operational supply state
Both the PFC and HBC controllers are switching. Current consumption is Ioper(SUPIC).
When the HBC controller is enabled, the switching frequency will be high initially and
the current consumption of the HBC MOSFET drivers will be dominant. The stored
energy in CSUPIC will supply the initial SUPIC current before the SUPIC supply source
takes over.
Pin SUPIC has a low short-circuit detection voltage (Vscp(SUPIC); typ. 0.65 V). The current
dissipated in the HV start-up source is limited while VSUPIC < Vscp(SUPIC) (see
Section 7.2.4).
7.2.2 Regulated supply (pin SUPREG)
The voltage range on pin SUPIC exceeds that of the gate voltages of the external
MOSFETs. For this reason, the TEA1713 contains an integrated series stabilizer. The
series stabilizer creates an accurate regulated voltage (Vreg(SUPREG); typ. 10.9 V) at the
buffer capacitor CSUPREG. This stabilized voltage is used to:
supply the internal PFC driver
supply the internal low-side HBC driver
supply the internal high-side driver via external components
as a reference voltage for optional external circuits
The SUPREG series stabilizer is enabled after CSUPIC has been fully charged. This
ensures that any optional external circuitry connected to SUPREG will not dissipate any of
the start-up current.
To ensure that the external MOSFETs receive sufficient gate drive current, the voltage on
SUPREG must reach Vstart(SUPREG) (and the voltage on SUPIC must reach the start level)
before the IC starts operating.
SUPREG is provided with undervoltage protection (UVP-SUPREG; see Section 7.9).
When VSUPREG falls below Vuvp(SUPREG) (typ. 10.3 V), two events will be triggered:
The IC will stop operating to prevent unreliable switching because the gate driver
voltage is too low. The PFC controller will stop switching immediately, but the HBC
controller will continue until the low-side stroke is active.
The maximum current from the internal SUPREG series stabilizer is reduced to
Ich(red)(SUPREG) (typ. 5.4 mA). This will reduce the dissipation in the series stabilizer in
the event of an overload at SUPREG while SUPIC is supplied from an external DC
source.
7.2.3 High-side driver floating supply (pin SUPHS)
The high-side driver is supplied by an external bootstrap buffer capacitor, CSUPHS. The
bootstrap capacitor is connected between the high-side reference pin HB and the
high-side driver supply input pin SUPHS. CSUPHS is charged from pin SUPREG via an


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