PHILIPS TEA1039

INTEGRATED CIRCUITS
DATA SHEET
TEA1039
Control circuit for switched-mode
power supply
Product specification
File under Integrated Circuits, IC02
August 1982
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
TEA1039
GENERAL DESCRIPTION
The TEA1039 is a bipolar integrated circuit intended for the control of a switched-mode power supply. Together with an
external error amplifier and a voltage regulator (e.g. a regulator diode) it forms a complete control system. The circuit is
capable of directly driving the SMPS power transistor in small SMPS systems.
It has the following features:
• Suited for frequency and duty factor regulation.
• Suited for flyback converters and forward converters.
• Wide frequency range.
• Adjustable input sensitivity.
• Adjustable minimum frequency or maximum duty factor limit.
• Adjustable overcurrent protection limit.
• Supply voltage out-of-range protection.
• Slow-start facility.
QUICK REFERENCE DATA
Supply voltage
VCC
nom.
14 V
Supply current
ICC
max.
13 mA
Output pulse repetition frequency range
fo
Output current LOW
IOL
Operating ambient temperature range
Tamb
PACKAGE OUTLINE
9-lead SIL; plastic (SOT-110B); SOT110-1; 1996 November 18.
August 1982
2
1 Hz to 100 kHz
max.
1 A
−25 to +125 °C
Philips Semiconductors
Product specification
TEA1039
Fig.1 Block diagram.
Control circuit for switched-mode power
supply
August 1982
3
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
TEA1039
PINNING
1
CM
overcurrent protection input
2
LIM
limit setting input
3
FB
feedback input
4
RX
external resistor connection
5
CX
external capacitor connection
6
M
mode input
7
VEE
common
8
Q
output
9
VCC
positive supply connection
Fig.2 Pinning diagram.
When the circuit is supplied from the SMPS itself, the
out-of-range protection also provides an effective
protection against any interruption in the feedback loop.
FUNCTIONAL DESCRIPTION
The TEA1039 produces pulses to drive the transistor in a
switched-mode power supply. These pulses may be varied
either in frequency (frequency regulation mode) or in width
(duty factor regulation mode).
Mode input M (pin 6)
The circuit works in the frequency regulation mode when
the mode input M is connected to ground (VEE, pin 7). In
this mode the circuit produces output pulses of a constant
width but with a variable pulse repetition time.
The usual arrangement is such that the transistor in the
SMPS is ON when the output of the TEA1039 is HIGH, i.e.
when the open-collector output transistor is OFF. The duty
factor of the SMPS is the time that the output of the
TEA1039 is HIGH divided by the pulse repetition time.
The circuit works in the duty factor regulation mode when
the mode input M is left open. In this mode the circuit
produces output pulses with a variable width but with a
constant pulse repetition time.
Supply VCC (pin 9)
The circuit is usually supplied from the SMPS that it
regulates. It may be supplied either from its primary d.c.
voltage or from its output voltage. In the latter case an
auxiliary starting supply is necessary.
Oscillator resistor and capacitor connections RX and
CX (pins 4 and 5)
The output pulse repetition frequency is set by an oscillator
whose frequency is determined by an external capacitor
C5 connected between the CX connection (pin 5) and
ground (VEE, pin 7), and an external resistor R4 connected
between the RX connection (pin 4) and ground. The
capacitor C5 is charged by an internal current source,
whose current level is determined by the resistor R4. In the
frequency regulation mode these two external
The circuit has an internal VCC out-of-range protection. In
the frequency regulation mode the oscillator is stopped; in
the duty factor regulation mode the duty factor is made
zero. When the supply voltage returns within its range, the
circuit is started with the slow-start procedure.
August 1982
4
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
components determine the minimum frequency; in the
duty factor regulation mode they determine the working
frequency (see Fig.4). The output pulse repetition
frequency varies less than 1% with the supply voltage over
the supply voltage range.
Limit setting input LIM (pin 2)
In the frequency regulation mode this input sets the
minimum frequency, in the duty factor regulation mode it
sets the maximum duty factor of the SMPS. The limit is set
by an external resistor R2 connected from the LIM input to
ground (pin 7) and by an internal current source, whose
current level is determined by external resistor R4.
In the frequency regulation mode the output is LOW from
the start of the cycle until the voltage on the capacitor
reaches 2 V. The capacitor is further charged until its
voltage reaches the voltage on either the feedback input
FB or the limit setting input LIM, provided it has exceeded
2,2 V. As soon as the capacitor voltage reaches 5,9 V the
capacitor is discharged rapidly to 1,3 V and a new cycle is
initiated (see Figs 5 and 6).
A slow-start procedure is obtained by connecting a
capacitor between the LIM input and ground. In the
frequency regulation mode the frequency slowly
decreases from fmax to the working frequency. In the duty
factor regulation mode the duty factor slowly increases
from zero to the working duty factor.
For voltages on the FB and LIM inputs lower than 2,2 V,
the capacitor is charged until this voltage is reached; this
sets an internal maximum frequency limit.
Overcurrent protection input CM (pin 1)
A voltage on the CM input exceeding 0,37 V causes an
immediate termination of the output pulse. In the duty
factor regulation mode the circuit starts again with the
slow-start procedure.
In the duty factor regulation mode the capacitor is charged
from 1,3 V to 5,9 V and discharged again at a constant
rate. The output is HIGH until the voltage on the capacitor
exceeds the voltage on the feedback input FB; it becomes
HIGH again after discharge of the capacitor (see Figs 7
and 8). An internal maximum limit is set to the duty factor
of the SMPS by the discharging time of the capacitor.
Output Q (pin 8)
The output is an open-collector n-p-n transistor, only
capable of sinking current. It requires an external resistor
to drive a n-p-n transistor in the SMPS (see Figs 9 and 10).
Feedback input FB (pin 3)
The output is protected by two diodes, one to ground and
one to the supply.
The feedback input compares the input current with an
internal current source whose current level is set by the
external resistor R4. In the frequency regulation mode, the
higher the voltage on the FB input, the longer the external
capacitor C5 is charged, and the lower the frequency will
be. In the duty factor regulation mode external capacitor
C5 is charged and discharged at a constant rate, the
voltage on the FB input now determines the moment that
the output will become LOW. The higher the voltage on the
FB input, the longer the output remains HIGH, and the
higher the duty factor of the SMPS.
August 1982
TEA1039
At high output currents the dissipation in the output
transistor may necessitate a heatsink. See the power
derating curve (Fig.3).
5
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
TEA1039
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
Supply voltage range, voltage source
VCC
−0,3 to
+ 20 V
Supply current range, current source
ICC
−30 to
+ 30 mA
Input voltage range, all inputs
VI
−0,3 to
Input current range, all inputs
II
Output voltage range
V8-7
+6 V
−5 to
+ 5 mA
−0,3 to
+ 20 V
0 to
1 A
Output current range
output transistor ON
I8
output transistor OFF
I8
−100 to + 50 mA
Storage temperature range
Tstg
−55 to + 150 °C
Operating ambient temperature range (see Fig.3)
Tamb
−25 to + 125 °C
Power dissipation (see Fig.3)
Ptot
Fig.3 Power derating curve.
August 1982
6
max.
2 W
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
TEA1039
CHARACTERISTICS
VCC = 14 V; Tamb = 25 °C unless otherwise specified
SYMBOL
MIN.
TYP.
MAX.
UNIT
Supply VCC (pin 9)
VCC
11
14
20
V
at VCC = 11 V
ICC
−
7,5
11
mA
at VCC = 20 V
ICC
−
9
12
mA
variation with temperature
∆I CC ⁄ I CC
------------------------∆T
−
−0,3
−
%/K
at ICC = 30 mA
VCC
23,5
−
28,5
V
variation with temperature
∆VCC/∆T
−
18
−
mV/K
Supply voltage, operating
Supply current
Supply voltage, internally limited
Low supply threshold voltage
variation with temperature
High supply threshold voltage
variation with temperature
VCCmin
9
10
11
V
∆VCC/∆T
−
−5
−
mV/K
VCCmax
21
23
24,6
V
∆VCC/∆T
−
10
−
mV/K
Feedback input FB (pin 3)
Input voltage for duty factor = 0;
V3-7
0
−
0,3
V
Internal reference current
−IFB
−
0,5IRX
−
mA
Internal resistor Rg
Rg
−
130
−
kΩ
Threshold voltage
V2-7
−
1
−
V
Internal reference current
−ILIM
−
0,25IRX
−
mA
M input open
Limit setting input LIM (pin 2)
Overcurrent protection input CM (pin 1)
Threshold voltage
variation with temperature
Propagation delay, CM input to output
August 1982
V1-7
300
370
420
mV
∆V1-7/∆T
−
0,2
−
mV/K
tPHL
−
500
−
ns
7
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
SYMBOL
TEA1039
MIN.
TYP.
MAX.
UNIT
Oscillator connections RX and CX (pins 4 and 5)
Voltage at RX connection
at −I4 = 0,15 to 1 mA
V4-7
6,2
7,2
8,1
V
variation with temperature
∆V4-7/∆T
−
2,1
−
mV/K
VLS
−
1,3
−
V
VFT
−
2
−
V
VFM
−
2,2
−
V
VHS
−
5,9
−
V
−ICX
−
0,25IRX
−
mA
fo
1
−
105
Hz
initial deviation
∆f/f
−10
−
10
%
variation with temperature
∆f ⁄ f
----------∆T
−
0,034
−
%/K
initial deviation
∆f/f
−20
−
+ 20
%
variation with temperature
∆f ⁄ f
----------∆T
−
−0,16
−
%/K
initial deviation
∆t/t
−25
−
+25
%
variation with temperature
∆t ⁄ t
----------∆T
−
0,2
−
%/K
initial deviation
∆f/f
−10
−
10
%
variation with temperature
∆f ⁄ f
----------∆T
−
0,034
−
%/K
at C5 = 3,6 nF
tOLmin
−
1
−
µs
variation with temperature
∆t ⁄ t
----------∆T
−
0,2
−
%/K
V8-7
−
0,8
1,2
V
∆V8-7/∆T
−
1,5
−
mV/K
V8-7
−
1,7
2,1
V
∆V8-7/∆T
−
−1,4
−
mV/K
Lower sawtooth level
Threshold voltage for output H to L
transition in F mode
Threshold voltage for maximum
frequency in F mode
Higher sawtooth level
Internal capacitor charging current,
CX connection
Oscillator frequency (output pulse
repetition frequency)
Minimum frequency in F mode,
Maximum frequency in F mode,
Output LOW time in F mode,
Pulse repetition frequency in D mode,
Minimum output LOW time in D mode
Output Q (pin 8)
Output voltage LOW at I8 = 100 mA
variation with temperature
Output voltage LOW at I8 = 1 A
variation with temperature
August 1982
8
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
Fig.4
TEA1039
Minimum pulse repetition frequency in the frequency regulation mode, and working pulse repetition
frequency in the duty factor regulation mode, as a function of external resistor R4 connected between RX
and ground with external capacitor C5 connected between CX and ground as a parameter.
August 1982
9
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
Fig.5
TEA1039
Timing diagram for the frequency regulation mode showing the voltage on external capacitor C5
connected between CX and ground and the output voltage as a function of time for three combinations of
input signals. a: The voltages on inputs FB or LIM are between 2,2 V and 5,9 V. The circuit is in its normal
regulation mode. b: The voltage on input FB or input LIM is lower than 2,2 V. The circuit works at its
maximum frequency. c: The voltages on inputs FB and LIM are higher than 5,9 V. The circuit works at its
minimum frequency.
August 1982
10
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
TEA1039
Fig.6
Minimum output pulse repetition time Tmin (curves a) and minimum output LOW time tOLmin (curves b) in
the frequency regulation mode as a function of external resistor R4 connected between RX and ground
with external capacitor C5 connected between CX and ground as a parameter.
Fig.7
Timing diagram for the duty factor regulation mode showing the voltage on external capacitor C5
connected between CX and ground and the output voltage as a function of time for two combinations of
input signals. a: The voltages on inputs FB or LIM are below 5,9 V. The circuit is in its normal regulation
range. b: The voltages on inputs FB and LIM are higher than 5,9 V. The circuit produces its minimum
output LOW time, giving the maximum duty factor of the SMPS.
August 1982
11
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
Fig.8
TEA1039
Minimum output LOW time tOLmin in the duty factor regulation mode as a function of external capacitor C5
connected between CX and ground. In this mode the minimum output LOW time is independent of R4 for
values of R4 between 4 kΩ and 80 kΩ.
August 1982
12
Product specification
TEA1039
Typical application of the TEA1039 in a variable-frequency flyback converter switched-mode power supply. An optocoupler CNX62 is
used for voltage separation.
APPLICATION INFORMATION SUPPLIED ON REQUEST.
Philips Semiconductors
13
Control circuit for switched-mode power
supply
August 1982
Fig.9
Philips Semiconductors
14
Control circuit for switched-mode power
supply
August 1982
Product specification
TEA1039
Fig.10 Typical application of the TEA1039 in a fixed-frequency, variable duty factor forward converter switched-mode power supply.
An optocoupler CNX62 is used for voltage separation.
APPLICATION INFORMATION SUPPLIED ON REQUEST.
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
TEA1039
PACKAGE OUTLINE
SIL9MPF: plastic single in-line medium power package with fin; 9 leads
SOT110-1
D
D1
q
P
A2
P1
A3
q1
q2
A
A4
seating plane
E
pin 1 index
c
L
1
9
b
e
Z
Q
b2
w M
b1
0
5
10 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
A2
max.
A3
A4
b
b1
b2
c
D (1)
D1
E (1)
e
L
P
P1
Q
q
q1
q2
w
Z (1)
max.
mm
18.5
17.8
3.7
8.7
8.0
15.8
15.4
1.40
1.14
0.67
0.50
1.40
1.14
0.48
0.38
21.8
21.4
21.4
20.7
6.48
6.20
2.54
3.9
3.4
2.75
2.50
3.4
3.2
1.75
1.55
15.1
14.9
4.4
4.2
5.9
5.7
0.25
1.0
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
ISSUE DATE
92-11-17
95-02-25
SOT110-1
August 1982
EUROPEAN
PROJECTION
15
Philips Semiconductors
Product specification
Control circuit for switched-mode power supply
TEA1039
SOLDERING
Introduction
There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and
surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for
surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often
used.
This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our
“IC Package Databook” (order code 9398 652 90011).
Soldering by dipping or by wave
The maximum permissible temperature of the solder is 260 °C; solder at this temperature must not be in contact with the
joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds.
The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the
specified maximum storage temperature (Tstg max). If the printed-circuit board has been pre-heated, forced cooling may
be necessary immediately after soldering to keep the temperature within the permissible limit.
Repairing soldered joints
Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more
than 2 mm above it. If the temperature of the soldering iron bit is less than 300 °C it may remain in contact for up to
10 seconds. If the bit temperature is between 300 and 400 °C, contact may be up to 5 seconds.
DEFINITIONS
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
August 1982
16