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What is TEA18362T?

This electronic component, produced by the manufacturer "NXP Semiconductors", performs the same function as "GreenChip SMPS control IC".


TEA18362T Datasheet PDF - NXP Semiconductors

Part Number TEA18362T
Description GreenChip SMPS control IC
Manufacturers NXP Semiconductors 
Logo NXP Semiconductors Logo 


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TEA18362T
GreenChip SMPS control IC
Rev. 2 — 12 December 2013
Product data sheet
1. General description
The TEA18362T is a controller IC for low-cost Switched Mode Power Supplies (SMPS). It
is intended for flyback topologies. The built-in green functions provide high efficiency at all
power levels.
At high power levels the flyback operates in Quasi-Resonant (QR) mode. At lower power
levels, the controller switches to Frequency Reduction (FR) or Discontinuous Conduction
Mode (DCM) and limits the peak current to approximately 25 % of the maximum peak
current. Valley switching is used in all operating modes.
At low power levels, when the flyback switching frequency drops below 25 kHz, the
flyback converter switches to burst mode. A special burst mode has been integrated
which reduces the opto current to a minimum level, ensuring high efficiency at low power
and excellent no load power performance. As the switching frequency in this mode has a
minimum value of 25 kHz while the burst frequency is below 800 Hz, the frequencies are
outside the audible range. During the non-switching phase of the burst mode, the internal
IC supply current is minimized for further efficiency optimization.
The TEA18362T includes an accurate OverPower Protection (OPP). The OPP enables
the controller to operate in overpower situations for a limited amount of time. If the output
is shorted, the system switches to low-power mode where the output power is limited to a
lower level.
The TEA18362T is manufactured in a high-voltage Silicon-On-Insulator (SOI) process.
The SOI process combines the advantages of a low-voltage process (accuracy,
high-speed protection, functions, and control), while maintaining the high-voltage
capabilities (high-voltage start-up, low standby power, and an integrated X-capacitor
discharge function).
The TEA18362T enables low-cost, highly efficient and reliable supplies for power
requirements up to 75 W to be designed with a minimum number of external components.
All values mentioned in this data sheet are typical values, unless otherwise specified.

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TEA18362T equivalent
NXP Semiconductors
TEA18362T
GreenChip SMPS control IC
7. Functional description
7.1 General control
Figure 3 shows a typical configuration of the TEA18362T, including flyback circuit
controller.
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Fig 3. Typical TEA18362T configuration
DDD
7.1.1 Start-up and UnderVoltage LockOut (UVLO)
Initially, the capacitor on the VCC pin is charged from the high-voltage mains using the
HV pin. As long as VCC is below Vstartup, the IC current consumption is minimized to
40 A.
When VCC reaches the Vstartup level, the control logic activates the internal circuitry. The
IC then waits for the PROTECT pin to reach Vdet(PROTECT) + Vdet(hys)PROTECT, the CTRL pin
to reach Vstartup(CTRL), and the mains voltage to increase to above the brownin level.
When all these conditions are met, the soft start capacitor on the ISENSE pin (CSS in
Figure 3) is charged. The system starts switching. In a typical application, the supply
voltage is taken over by the auxiliary winding of the transformer.
During the start-up period, the VCC pin is continuously regulated to the Vstartup level using
the HV charge current until the output voltage is at its regulation level, which is detected
via the CTRL pin. In this way the VCC capacitor value can be limited. Due to the limited
current capability from the HV pin and depending on the mains voltage, the voltage on pin
VCC can still drop slightly during the start-up period.
TEA18362T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 12 December 2013
© NXP B.V. 2013. All rights reserved.
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