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TEA1523P Datenblatt(PDF) 4 Page - NXP Semiconductors

Teilenummer TEA1523P
Bauteilbeschribung  SMPS ICs for low-power systems Rev. 04 ??14 September 2010
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
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TEA152X
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 04 — 14 September 2010
4 of 20
NXP Semiconductors
TEA152x
SMPS ICs for low-power systems
7.
Pinning information
7.1 Pinning
7.2 Pin description
8.
Functional description
The TEA152x family is the heart of a compact flyback converter, with the IC placed at the
primary side. The auxiliary winding of the transformer can be used for indirect feedback to
control the isolated output. This additional winding also powers the IC. A more accurate
control of the output voltage and/or current can be implemented with an additional
secondary sensing circuit and optocoupler feedback.
The TEA152x family uses voltage mode control. The frequency is determined by the
maximum transformer demagnetizing time and the time of the oscillator. In the first case,
the converter operates in the Self-Oscillating Power Supply (SOPS) mode. In the latter
case, it operates at a constant frequency, which can be adjusted with external
Fig 2.
Pin configuration DIP8
Fig 3.
Pin configuration SO14
TEA152xP
VCC
DRAIN
GND
n.c.
RC
SOURCE
REG
AUX
001aae137
1
2
3
4
6
5
8
7
TEA152xT
VCC
DRAIN
GND
n.c.
GND
n.c.
GND
SOURCE
GND
GND
RC
GND
REG
AUX
001aae138
1
2
3
4
5
6
7
8
10
9
12
11
14
13
Table 3.
Pin description
Symbol
Pin
Description
DIP8
SO14
VCC
1
1
supply voltage
GND
2
2, 3, 4,
5, 9, 10
ground
RC
36frequency setting
REG
4
7
regulation input
AUX
5
8
input for voltage from the auxiliary winding for timing
(demagnetization)
SOURCE
6
11
source of the internal MOS switch
n.c.
7
12, 13
not connected
DRAIN
8
14
drain of the internal MOS switch; input for the start-up current
and valley sensing


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