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TEA1716T データシート(PDF) 8 Page - NXP Semiconductors

部品番号 TEA1716T
部品情報  Resonant power supply control IC with PFC
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TEA1716T データシート(HTML) 8 Page - NXP Semiconductors

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TEA1716T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 3 — 30 November 2012
8 of 47
NXP Semiconductors
TEA1716T
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 the SUPIC pin
(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 is high initially and the
HBC MOSFET drivers current consumption is dominant. The stored energy in CSUPIC
supplies the initial SUPIC current before the SUPIC supply source takes over.
Burst stop mode
Only a small section of the IC is active while CSUPREG is kept charged and the sensing
of the SNSBURST input is active. The PFC and HBC controllers are stopped. Current
consumption is limited to Iburstm(SUPIC).
The SUPIC pin has a low short circuit detection voltage (Vscp(SUPIC) = 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 (SUPREG pin)
The voltage range on the SUPIC pin exceeds that of the external MOSFETs gate
voltages. The TEA1716T contains an integrated series stabilizer. The series stabilizer
creates an accurate regulated voltage (Vreg(SUPREG) = 11.3 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 using external components
As a reference voltage for optional external circuits
The SUPREG series stabilizer is enabled after CSUPIC has been fully charged. Enabling
the stabilizer after charging ensures that any optional external circuitry connected to
SUPREG does not dissipate any of the start-up current.
To ensure that the external MOSFETs receive sufficient gate drive current, the voltage on
the SUPREG pin must reach Vstart(SUPREG). In addition, the voltage on the SUPIC pin
must reach the start level. The IC starts operating when both voltages reach their start
levels.
SUPREG is provided with undervoltage protection (UVP-SUPREG; see Section 7.9).
When VSUPREG <Vuvp(SUPREG) (10 V), two events are triggered:
The IC stops operating to prevent unreliable switching because the gate driver voltage
is too low. The PFC controller stops switching immediately, but the HBC controller
continues until the low-side stroke is active.
The maximum current from the internal SUPREG series stabilizer is reduced to
Ich(red)(SUPREG) (5.4 mA). This feature reduces the dissipation in the series stabilizer
when an overload occurs at the SUPREG pin while the SUPIC pin is supplied from an
external DC supply.


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