TEA1532
Philips Semiconductors
GreenChip II SMPS control IC
Table 5:
Characteristics …continued
Tamb = 25 °C; VCC = 15 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
the IC; unless otherwise specified.
Symbol
Temperature protection
Tprot(max) maximum temperature
Parameter
Conditions
Min
Typ
Max
Unit
130
-
140
8
150
-
°C
°C
protection level
[3]
Tprot(hyst)
hysteresis for the temperature
protection level
[1] Guaranteed by design.
[2] Vi detection level. Set by the demagnetization resistor RDEM; see Section 7.14
[3] Valid for VCC > 2 V.
11. Application information
A converter with the TEA1532 consists of an input filter, a transformer with a third winding
(auxiliary), and an output stage with a feedback circuit.
Capacitor CVCC buffers the IC supply voltage, which is powered via the high voltage
rectified mains during start-up and via the auxiliary winding during operation.
A sense resistor Rsense converts the primary current into a voltage at pin SENSE. The
value of Rsense defines the maximum primary peak current.
Figure 10 shows a flyback configuration using the discontinuous conduction mode.
Pin PROTECT is used in this example for external overvoltage protection and open loop
or output short-circuit protection. If this pin is not used, it must be tied to ground. Figure 13
shows a flyback configuration using the continuous conduction mode. Pin PROTECT is
used in this example for external overtemperature protection and open loop or output
short-circuit protection.
9397 750 13113
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 28 May 2004
15 of 27
NXP [ NXP ]
