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TEA1623P; TEA1623PH
STARplugTM
Rev. 01 — 17 March 2004 |
Product data sheet |
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1. General description
The TEA1623P; TEA1623PH is a Switched Mode Power Supply (SMPS) controller IC that operates directly from the 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 TEA1623P; TEA1623PH 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 TEA1623P; TEA1623PH renders an efficient and low cost power supply system.
2. Features
■Designed for general purpose 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 load insensitive regulation loop constant
■Valley switching for minimum switch-on loss
■Frequency reduction at low power output for low standby power: <100 mW
■Adjustable overcurrent protection
■Undervoltage protection
■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 package.
3.Applications
■ Adapters |
■ VCD |
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■ Set-Top Box (STB) |
■ CD(R) |
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■ DVD |
■ PC Silverbox standby SMPS. |
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Philips Semiconductors |
TEA1623P; TEA1623PH |
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STARplugTM |
4. Quick reference data
Table 1: |
Quick reference data |
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Symbol |
Parameter |
Conditions |
Min |
Typ |
Max |
Unit |
VCC(max) |
maximum supply voltage |
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- |
- |
40 |
V |
VDRAIN(max) |
maximum voltage at pin |
Tj > 0 °C |
- |
- |
650 |
V |
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DRAIN |
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IDRAIN |
supply current drawn from |
no auxiliary supply |
- |
0.5 |
- |
mA |
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pin DRAIN |
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RDSon |
drain-source on-state |
ISOURCE = −0.5 A |
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resistance |
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Tj = 25 °C |
- |
6.5 |
7.5 |
Ω |
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Tj = 100 °C |
- |
9.0 |
10.0 |
Ω |
fosc |
oscillator frequency range |
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10 |
- |
200 |
kHz |
Tamb |
ambient temperature |
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−20 |
- |
+85 |
°C |
5. Ordering information
Table 2: Ordering information
Type number |
Package |
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Name |
Description |
Version |
TEA1623P |
DIP8 |
plastic dual in-line package; 8 leads (300 mil) |
SOT97-1 |
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TEA1623PH |
DIP16 |
plastic dual in-line package; 16 leads (300 mil); |
SOT38-1 |
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long body |
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9397 750 12579 |
© Koninklijke Philips Electronics N.V. 2004. All rights reserved. |
Product data sheet |
Rev. 01 — 17 March 2004 |
2 of 18 |
Philips Semiconductors |
TEA1623P; TEA1623PH |
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STARplugTM |
6. Block diagram
VCC |
1 |
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SUPPLY |
8 |
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DRAIN |
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TEA1623P |
VALLEY |
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2 |
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LOGIC |
7 |
GND |
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n.c. |
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100 mV |
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PWM |
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stop |
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RC |
3 |
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THERMAL |
6 |
OSCILLATOR |
SOURCE |
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SHUTDOWN |
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low frequency |
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PROTECTION |
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LOGIC |
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f |
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POWER-UP |
blank |
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RESET |
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1.8 |
U |
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overcurrent |
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2.5 V |
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0.5 V |
REG |
4 |
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5 |
10x |
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AUX |
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short winding |
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0.75 V |
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col011 |
Fig 1. Block diagram of TEA1623P.
9397 750 12579 |
© Koninklijke Philips Electronics N.V. 2004. All rights reserved. |
Product data sheet |
Rev. 01 — 17 March 2004 |
3 of 18 |
Philips Semiconductors |
TEA1623P; TEA1623PH |
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STARplugTM |
VCC |
3 |
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SUPPLY |
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14 |
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DRAIN |
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1, 2, 7, 9, |
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VALLEY |
10, 13, |
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TEA1623PH |
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15, 16 |
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n.c. |
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4 |
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LOGIC |
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GND |
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100 mV |
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PWM |
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stop |
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RC |
5 |
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THERMAL |
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12 |
OSCILLATOR |
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SOURCE |
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SHUTDOWN |
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low frequency |
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PROTECTION |
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LOGIC |
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f |
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POWER-UP |
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blank |
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RESET |
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1.8 |
U |
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overcurrent |
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2.5 V |
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0.5 V |
REG |
6 |
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11 |
10x |
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AUX |
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8 |
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short winding |
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SGND |
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0.75 V |
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col013 |
Fig 2. Block diagram of TEA1623PH.
7.Pinning information
7.1Pinning
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n.c. |
1 |
16 |
n.c. |
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n.c. |
2 |
15 |
n.c. |
VCC |
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VCC |
3 |
14 |
DRAIN |
1 |
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8 |
DRAIN |
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GND |
4 |
13 |
n.c. |
GND |
2 |
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7 |
n.c. |
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TEA1623P |
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RC |
5 |
TEA1623PH |
SOURCE |
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RC |
3 |
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6 |
SOURCE |
12 |
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REG |
6 |
11 |
AUX |
REG |
4 |
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5 |
AUX |
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n.c. |
7 |
10 |
n.c. |
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001aaa310 |
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SGND |
8 |
9 |
n.c. |
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001aaa312 |
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a. |
DIP8 package. |
b. DIP16 package. |
Fig 3. |
Pin configuration. |
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9397 750 12579 |
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© Koninklijke Philips Electronics N.V. 2004. All rights reserved. |
Product data sheet |
Rev. 01 — 17 March 2004 |
4 of 18 |
Philips Semiconductors |
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|
TEA1623P; TEA1623PH |
|||
|
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|
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STARplugTM |
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7.2 Pin description |
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Table 3: |
Pin description |
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Symbol |
Pin |
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Description |
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TEA1623P |
TEA1623PH |
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VCC |
1 |
3 |
supply voltage |
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GND |
2 |
4 |
ground |
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RC |
3 |
5 |
frequency setting |
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REG |
4 |
6 |
regulation input |
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SGND |
- |
8 |
signal ground; must preferably be connected to pin GND |
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AUX |
5 |
11 |
input for voltage from auxiliary winding for timing |
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(demagnetization) |
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SOURCE |
6 |
12 |
source of internal MOS switch |
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n.c. |
7 |
1, 2, 7, 9, 10, |
not connected |
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13, 15, 16 |
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DRAIN |
8 |
14 |
drain of internal MOS switch; input for start-up current |
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and valley sensing |
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8. Functional description
The TEA1623P; TEA1623PH 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 TEA1623P; TEA1623PH 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 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 lock-out
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 relative sensitivity of the duty factor to the regulation voltage at low duty factor is almost
9397 750 12579 |
© Koninklijke Philips Electronics N.V. 2004. All rights reserved. |
Product data sheet |
Rev. 01 — 17 March 2004 |
5 of 18 |
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