TEA1532 Philips Semiconductors, TEA1532 Datasheet - Page 5

• Manufacturer Part Number: TEA1532
• Description: GreenChip SMPS control IC
• Manufacturer: Philips Semiconductors

Philips Semiconductors
9397 750 13113
Preliminary data sheet
The TEA1532 can operate in multi modes; see
In QR mode, the next converter stroke is started only after demagnetization of the
transformer current (zero current switching), while the drain voltage has reached the
lowest voltage to minimize switching losses (green function). The primary resonant circuit
of primary inductance and drain capacitor ensures this quasi-resonant operation. The
design can be optimized in such a way that zero voltage switching can extend over most of
the universal mains range.
To prevent very high frequency operation at lower loads, the quasi-resonant operation
changes smoothly in fixed frequency Pulse Width Modulation (PWM) control.
Fig 4. Typical configuration
Fig 5. Multi mode and FF-CCM operation.
Rev. 01 — 28 May 2004
C
(kHz)
VCC
f
63
Cycle
skip
V
i
1
2
3
4
TEA1532T
TEA1532P
fixed
coa015
8
7
6
5
Figure
FF-CCM
QR
5.
GreenChip II SMPS control IC
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
coa017
P (W)
TEA1532
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