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PDF TEA1623P Data sheet ( Hoja de datos )
| Número de pieza | TEA1623P | |
| Descripción | STARplug switched mode power supply controller IC | |
| Fabricantes | NXP Semiconductors | |
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TEA1623P; TEA1623PH
STARplug switched mode power supply controller IC
Rev. 3 — 30 August 2010
Product data sheet
1. General description
The TEA1623 is a Switched Mode Power Supply (SMPS) controller IC that operates
directly from rectified universal mains. It is implemented in the high voltage EZ-HV SOI
process, combined with a low voltage BiCMOS process.
The device includes a high voltage power switch and a circuit for start-up directly from the
rectified mains voltage. A dedicated circuit for valley switching is built in, which makes a
very efficient slim-line electronic power-plug concept possible.
In its most basic version of application, the TEA1623 acts as a voltage source. Here, no
additional secondary electronics are required. A combined voltage and current source can
be realized with minimum costs for external components. Implementation of the TEA1623
renders an efficient and low cost power supply system.
2. Features and benefits
Designed for general purpose power supplies
Integrated power switch: 6.5 Ω and 650 V
Operates from universal AC mains supplies: 80 V to 276 V
Adjustable frequency for flexible design
RC oscillator for stable output regulation
Valley switching for minimum switch-on loss
Frequency reduction at low power output for low standby power: < 100 mW
Adjustable OverCurrent Protection (OCP)
UnderVoltage Protection (UVP)
Temperature protection
Short-winding protection
Safe restart mode for system fault conditions
Simple application with both primary and secondary (opto) feedback
Available in 8-pin and 16-pin DIP packages.
3. Applications
Adapters
Set-Top Box (STB)
DVD
VCD
CD(R)
PC Silverbox standby SMPS
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1 page  
NXP Semiconductors
TEA1623P; TEA1623PH
STARplug switched mode power supply controller IC
7.2 Pin description
Table 3.
Symbol
VCC
GND
RC
REG
SGND
Pin description
Pin
TEA1623P
1
2
3
4
-
AUX
5
SOURCE
n.c.
6
7
DRAIN
8
TEA1623PH
3
4
5
6
8
11
12
1, 2, 7, 9, 10, 13,
15, 16
14
Description
supply voltage
ground
frequency setting
regulation point
signal ground; preferably connected
to pin GND
input for voltage from auxiliary
winding for timing (demagnetization)
source of internal MOS switch
not connected
drain of internal MOS switch; input for
start-up current and valley sensing
8. Functional description
The TEA1623 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 TEA1623 uses voltage mode control. The frequency is determined by the maximum
transformer demagnetizing time or the frequency 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 components RRC
and CRC. This mode is called Pulse Width Modulation (PWM). Furthermore, a primary
stroke is started only in a valley of the secondary ringing. This valley switching principle
minimizes capacitive switch-on losses.
8.1 Start-up and UnderVoltage LockOut (UVLO)
Initially, the IC is self supplying from the rectified mains voltage. The IC starts switching as
soon as the voltage on pin VCC passes the VCC(start) level. The supply is taken over by the
auxiliary winding of the transformer as soon as VCC is high enough and the supply from
the line is stopped for high efficiency operation.
As soon as the voltage on pin VCC drops below the VCC(stop) level, the IC stops switching
and restarts from the rectified mains voltage.
8.2 Oscillator
The frequency of the oscillator is set by the external resistor and capacitor on pin RC. The
external capacitor is charged rapidly to the VRC(max) level and, starting from a new primary
stroke, it discharges to the VRC(min) level. Because the discharge is exponential, the
TEA1623P_TEA1623PH
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2010
© NXP B.V. 2010. All rights reserved.
5 of 20
5 Page 
NXP Semiconductors
TEA1623P; TEA1623PH
STARplug switched mode power supply controller IC
Table 6. Characteristics …continued
Tamb = 25 °C; no overtemperature; all voltages are measured with respect to ground; currents are positive when flowing into
the IC, unless otherwise specified.
Symbol
Parameter
Conditions
Min Typ Max Unit
VBR(drain)
RDSon
tdrain(f)
drain breakdown voltage
drain-source on-state resistance
drain fall time
Tj > 0 °C
ISOURCE = −0.5 A
Tj =2 5 °C-
Tj =1 00 °C
VDRAIN(switch_on) =3 00 V; no
external capacitor at pin DRAIN
650 - - V
6.5 7.5 Ω
- 9.0 10.0 Ω
-7 5 - ns
Temperature protection
Tprot(max)
maximum threshold temperature
Tprot(hys)
threshold temperature hysteresis
Overcurrent and short winding protection: pin SOURCE
150 160 170 °C
- 2 - °C
Vsource(max)
Vswp
td(propagation)
overcurrent protection voltage
dV/dt = 0.1 V/μs
short-winding protection voltage dV/dt = 0.5 V/μs
delay from detecting Vsource(max) to dV/dt = 0.5 V/μs
switch-off
0.47 0.50 0.53 V
0.7 0.75 0.8 V
- 160 185 ns
tleb
leading edge blanking time
overcurrent and short-winding
250 350 450 ns
protection
12. Application information
mains
R1
LF
CF1 CF2
Z1
D1
R2 D2
CVCC
VCC
1
DRAIN
8
GND
2
n.c.
7
RRC RC TEA1623P SOURCE RI
R4 3 6
CRC
REG
4
AUX
5
RAUX
R3
Further application information can be found in the TEA152x application note.
Fig 7. Application with primary sensing for TEA1623P
D5
C5
Vo
C6 - Ycap
col012
TEA1623P_TEA1623PH
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2010
© NXP B.V. 2010. All rights reserved.
11 of 20
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| PDF Descargar | [ Datasheet TEA1623P.PDF ] | |
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