TIL5942NFC [TI]
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TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
NFC or NFD PACKAGE
TL1431, Optocoupler, and Advanced
Current-Mode-PWM in a 16-Pin DIP
(TOP VIEW)
LinBiCMOS Current-Mode-PWM Operates
at Frequencies up to 1 MHz
FB
INPUT_GND
COMP
IS
1
2
3
4
16
15
14
13
12
11
VC
100-µA Maximum Start-up Current
RT/CT
PWM_GND
REF
2-A, 30-ns MOSFET Drive Output
BIAS
TL1431 Voltage Reference/Feedback
Amplifier
V
CC
NC
NC
7
8
10 REG
OUT
7500-V Peak Withstand Voltage
9
Available With Gull Wing VDE Lead Forms
–40°C to 100°C Free-Air Operating
Temperature Range
Safety Regulatory Approvals Pending
– UL . . . File Number E65085
– FIMKO, SEMKO, NEMKO, DEMKO
– EN60065/IEC 65
– EN60950/IEC 950
– VDE 0884, Level 4 (6000-V Insulation)
description
The TIL5942 and TIL5942A consist of an advanced current-mode-PWM controller and a TL1431 adjustable
precision shunt regulator, incorporated in a single package. The controller provides a photodetector, an
improved MOSFET drive output, and an LED for isolation. The TL1431 is configured as a precision
reference/error amplifier. Using the TIL5942 or the TIL5942A, the power-supply designer can implement the
controller for an isolated dc/dc converter or off-line switching power supply, with one IC and a few passive
components. The TIL5942 standard version has a reference voltage tolerance of 0.8% and the TIL5942A has
a reference voltage tolerance of 0.4%
These controllers are available in a 16-pin PDIP with a lead form for through-hole, or gull-wing lead form for
surface-mount applications. These devices operate over a –40°C to 100°C junction temperature range.
End equipment applications for the TIL5942 and the TIL5942A include isolated ac-to-dc power supplies and
dc/dc converters.
AVAILABLE OPTIONS
PACKAGED DEVICES
PLASTIC DUAL-IN-LINE
WITH VDE LEAD FORM,
THROUGH-HOLE
PLASTIC DUAL-IN-LINE
WITH VDE LEAD FORM,
SURFACE-MOUNT LEADS
T
A
–40°C to 100°C TIL5942NFC, TIL5942ANFC TIL5942NFD, TIL5942ANFD
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
LinBiCMOS is a trademark of Texas Instruments Incorporated.
Copyright 1997, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
functional block diagram
11
V
CC
Voltage
Reference
Voltage
Regulator
10
REG
13
PWM_GND
12
14
REF
Driver
9
Oscillator
RT/CT
D
Q
OUT
Primary
CLK
Secondary
I
I
R
(VC)
IB(IS)
4
3
BIAS
LED
COMP
1
2
FB
TL1431X
INPUT_GND
1V
16
15
IS
VC
Terminal Functions
TERMINAL
NAME
I/O
DESCRIPTION
NO.
1
FB
I
I
Feedback. FB is an error-amplifier inverting input.
Ground connection for the voltage reference/error amplifier section.
INPUT_GND
COMP
2
3
O
Error amplifier output/LED cathode connection. RC networks may be connected between COMP, FB, and
GND to stabilize the control loop of the dc/dc converter.
BIAS
4
I
OptocouplerLED anode. BIAS connects to the output voltage of the dc/dc converter or to some other suitable
supply voltage through a resistor.
NC
7,8
9
No connection.
OUT
REG
O
O
I
Drive output. OUT is a pulse-width-modulated output.
Regulator output. A 0.1-µF, typical, ceramic capacitor should be connected between REG and PWM_GND.
Supply voltage for PWM controller
10
11
12
13
14
15
16
V
CC
REF
O
I
PWM 5-V reference output
PWM_GND
RT/CT
VC
PWM ground connection
Connection for external RC network to set PWM oscillator frequency
Connection for integrating capacitor (0.1µF typ) to PWM_GND (terminal 13)
PWM current sense input
IS
I
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
theory of operation
The current through the LED is controlled by the precision reference amplifier according to the voltage error at
FB, with respect to the internal 2.5-V reference. The light emitted by the LED is coupled to the PWM controller
to change the modulation duty cycle and reduce the error voltage.
The PWM controller is in the off state until V
is greater than the turn-on threshold voltage level. Typically the
CC
controller turns on at 16 V. It stays in the on state until the voltage drops below the turn-off threshold of 10 V
typical. Upon turning on, the controller generates an internal reference voltage V of 5 V, which controls the
ref
chiplogicandcanbeusedforlow-powerexternalapplications. AvoltageV isalsogeneratedtosupplycurrent
reg
to charge an external capacitor C , which supplies instant current for the pulsing output.
reg
The oscillator shown in Figure 1 consists of an external resistance-capacitance (RC) network, a voltage
comparator, logic, a 125-ns one-shot for the dead time, and a MOSFET used to discharge the external capacitor
to ground each cycle. At the end of the reset period, C charges toward the 5-V reference through timing resistor
T
R for a time given by one time constant R C . The oscillator period is given by:
T
T T
T
= R C + 0.125 µs.
T T
OSC
A current I
the voltage V
supplied out of IS biases the current-sense resistor on the primary side of the power supply. If
IB(IS)
at IS exceeds 1 V, the output pulse is reset. An internal current source I
supplies a nominal
(IS)
(VC)
current of –4 µA as a reference. This current charges a capacitor connected between VC and ground. The
photodiode is connected internally in parallel with the capacitor. The light-generated photodiode current tends
to discharge the capacitor until a steady-state balance is reached. When I
current, a net current is being sourced and the capacitor is charged. When I
current, a net current is being sinked and the capacitor is discharged. When I
is greater than the photodiode
(VC)
is lower than the photodiode
is equal to the photodiode
(VC)
(VC)
current, the capacitor voltage stays constant. The voltage at VC is monitored by an internal comparator with
a threshold voltage given by V + 2Vd, where Vd is a diode voltage drop of typically 0.7 V.
(IS)
Whenever VC is below this threshold, the output pulse is reset. The output pulse is enabled if V
1 V and VC is greater than its threshold.
is less than
(IS)
The 5-V reference on the PWM chip is brought out on REF and can be used as a reference and/or supply for
external circuits as long as the output current is limited to 20 mA and the power dissipation is not exceeded.
It is recommended that a 0.1-F ceramic capacitor be connected between REF and PWM_GND.
REF
R
(see Note A)
T
RT/CT
C
T
PWM_GND
NOTE A: t
osc
= R C + 0.125 µs
T T
Figure 1. Typical Oscillator Application
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
†
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
LED/REF section
Supply voltage range, V , BIAS to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 37 V
CC
Input current range at FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 µA to 10 mA
LED forward current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Input LED reverse voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
PWM section
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 30 V
CC
Input voltage at IS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 5 V
Continuous supply current, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 mA
CC
entire package
Isolation voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 kV peak or dc (5.3 kVrms)
Total continuous power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 100°C
A
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 150°C
stg
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DISSIPATION RATING TABLE
T
≤ 25°C
DERATING FACTOR
T
= 70°C
T = 85°C
A
A
A
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING POWER RATING
A
NFD
NFC
1000 mW
8 mW/°C
8 mW/°C
640 mW
640 mW
520 mW
520 mW
1000 mW
recommended operating conditions
MIN MAX
UNIT
V
Supply voltage range, V , PWM
CC
11
30
2
Peak output current, I
A
O
Output current, REF
0
10
20
mA
kHz
kΩ
nF
Oscillator frequency, f
osc
External timing resistance, R
1000
39
2
T
External timing capacitance, C
0.47
10
T
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
electrical characteristics over recommended operating junction temperature range, V
= 17 V,
CC
R = 3.9 kΩ, C = 1 nF (unless otherwise noted)
T
T
voltage reference/error amplifier
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
T
= 25°C,
A
TIL5942
2.48
2.5
2.52
V
V
= V
I(FB)
O(COMP)
V
ref
Reference voltage
I
= 10 mA,
I(LED)
See Figure 2
TIL5942A
2.49
2.5
25
2.51
V
T
V
I
= 25°C to 100°C,
A
Deviation of reference voltage over
temperature
= V
O(COMP)
= 10 mA,
I(FB)
V
mV
ref(dev)
I(LED)
See Figure 2
V
ref
∆V
= 4 V to 37 V,
= 10 mA
Ratio of reference voltage change to
change in input light-emitting-diode voltage
I(LED)
1.1
2
3
mV/V
V
I
I
I(LED)
I(LED)
= 10 mA,
R3 = 10 kΩ
I(LED)
I
I
I
I
Feedback input current
1.5
0.5
µA
µA
mA
µA
I(FB)
See Figure 4
I
T
= 10 mA,
= 25°C to 100°C
R3 = 10 kΩ,
See Figure 4
Deviation of reference input current over
full temperature range
I(LED)
A
ref(dev)
DRV(min)
I(off)
T
V
= 25°C,
A
Minimum drive current
0.4
1
= V
O(COMP)
I(FB)
I(FB)
V
= 37 V,
V
I(FB)
= 0
I(LED)
Off-state input light-emitting diode current
Regulator output impedance
0.18
0.1
0.5
See Figure 5
V
= V
f ≤ 1 kHz
O(COMP)
O(COMP)
†
Zka
I
= 1 mA to 50 mA
†
This symbol is not currently listed within EIA or JEDEC standards for semiconductor symbology.
LED
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
1.4
UNIT
V
V
F
Forward voltage
LED reverse current
T
= 25°C,
V
= V
,
I = 10 mA, See Figure 2
I(LED)
1.2
A
O(COMP)
I(FB)
I
R
V
= 6 V
10
µA
O
PWM Section
voltage reference
PARAMETER
Reference voltage
TEST CONDITIONS
= 1 mA, T = 25°C
MIN
TYP
MAX
5.05
50
UNIT
V
V
I
4.95
5
ref
O
J
V
Reference line regulation
Reference load regulation
V
= 11 V to 30 V
mV
mV
mV
mV
ref(line reg)
CC
V
I
O
= 0 mA to 20 mA
= 25°C to 100°C
= 25°C to –40°C
25
ref(load reg)
T
–4
–4
A
V
Reference temperature regulation
ref(temp reg)
T
A
oscillator
PARAMETER
TEST CONDITIONS
R = 3.9 kΩ, C = 1 nF
MIN
225
100
TYP
250
148
0.5
MAX
275
UNIT
kHz
ns
f
t
Frequency
osc
Dead time, (minimum off time)
Minimum timing ramp voltage
Peak timing ramp voltage
200
(off)
V
3.2
V
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
electrical characteristics over recommended operating junction temperature range, V
= 15 V,
CC
R = 3.9 kΩ, C = 1 nF (unless otherwise noted) (continued)
T
T
current sense
PARAMETER
TEST CONDITIONS
MIN
TYP
–4
MAX
UNIT
µA
ns
I
t
Input bias current, IS
Delay time to output
Current sense threshold
–10
IB(IS)
70
d
V
0.9
1.0
1.1
V
IT(CS)
integrating capacitor current
PARAMETER
TEST CONDITIONS
MIN
TYP
–5
8
MAX
UNIT
µA
I
I
Capacitor integrating current at VC with LED off
Photodiode light current at VC, I – I
I
I
= 0
–10
O(cap)
I(LED)
= 10 mA,
T
A
= 25°C
5
µA
L
(VC)(on) (VC)(off)
I(LED)
PWM (pulse-width modulation)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Maximum duty cycle
C
C
= 1 nF,
C
C
= 0.1 µF
= 0.1 µF
97%
L
L
REG
REG
Minimum duty cycle
= 1 nF,
0
UVLO (under voltage lockout)
PARAMETER
TEST CONDITIONS
TEST CONDITIONS
TEST CONDITIONS
MIN
15
9
TYP
16
MAX
17
UNIT
V
V
V
Start-up threshold voltage
IT(H)
Minimum operating voltage after start-up
10
11
V
IT(L)
supply current
PARAMETER
Start-up current
Operating supply current
MIN
TYP
55
MAX
100
16
UNIT
µA
I
I
V
V
< 15 V
> 11 V
CC(off)
CC
8
13
mA
CC(on)
CC
output section
PARAMETER
MIN TYP
MAX
UNIT
I
I
I
I
= –20 mA
11
11.7
11.2
0.78
1.38
20
O
O
O
O
V
V
High-level output voltage
Low-level output voltage
V
OH
= –200 mA
= 20 mA
10.5
0.9
2
V
OL
= 200 mA
t
t
Rise time
Fall time
T = 25°C,
C
C
= 1 nF
= 1 nF
35
35
ns
ns
r
J
L
L
T = 25°C,
20
f
J
regulator
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
V
Regulator output Voltage
V
V
= 17 V
12
12.5
13.5
O(REG)
CC
= 0 V
O
I
Regulator short-circuit output current
–9 –12.5 –15.0
mA
OS(REG)
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
PARAMETER MEASUREMENT INFORMATION
I
I(LED)
I
I(LED)
16
15
14
13
12
11
10
9
16
15
14
13
12
11
10
9
1
1
A
+
–
V
F
V
PWM
With
Photo-
Diode
PWM
With
Photo-
Diode
R1
V
2
4
2
4
V
V
I(LED)
V
+
V
V
O(COMP)
V
ref
ref
R2
–
3
3
Figure 3. ∆V /∆V
Test Circuit
Figure 2. V , V , I
Test Circuit
ref
I(LED)
ref
F
min
I
I(off)
I
I(LED)
16
15
14
13
12
11
10
9
16
15
14
13
12
11
10
9
1
1
A
I
I(FB)
PWM
With
Photo-
Diode
PWM
With
Photo-
Diode
2
4
2
4
A
V
I(LED)
V
V
R3
V
ref
3
3
Figure 5. I
Test Circuit
Figure 4. I
Test Circuit
I(off)
I(FB)
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
6
V
LED forward voltage
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
Free-air temperature
F
V
ref
Input reference voltage
7
I
I
Feedback input current
8
I(FB)
On-state supply current
PWM reference voltage
PWM regulator voltage
9
CC(on)
V
ref
10
11
12
13
14
15
16
17
18
19
20
21
22
V
reg
PWM relative oscillator frequency
Integrating capacitor current
Photodiode current source
Sense current source
I
I
I
t
I
(VC)
L
IB(IS)
(off)
PWM dead time
PWM regulator short-circuit current
Low-state output voltage
Low-state output voltage
PWM turn-on threshold voltage
PWM turn-off threshold voltage
OS(REG)
V
OL(1)
V
OL(2)
V
IT(H)
V
IT(L)
PWM threshold voltages showing hysteresis Free-air temperature
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
TYPICAL CHARACTERISTICS
LED FORWARD VOLTAGE
vs
FREE-AIR TEMPERATURE
INPUT REFERENCE VOLTAGE
vs
FREE-AIR TEMPERATURE
1.35
1.3
3
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
I
= 10 mA
I(LED)
I
= 10 mA
I(LED)
1.25
1.2
1.15
1.1
1.05
1
2.1
2
0.95
–40 –20
0
20
40
60
80
100
–40 –20
0
20
40
60
80
100
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 6
Figure 7
FEEDBACK INPUT CURRENT
vs
FREE-AIR TEMPERATURE
ON-STATE SUPPLY CURRENT
vs
FREE-AIR TEMPERATURE
1.8
1.6
1.4
1.2
14.2
I
= 10 mA
V
CC
= 17 V
I(LED)
R = 10 kΩ
14
13.8
13.6
13.4
13.2
1
0.8
0.6
0.4
0.2
0
13
12.8
12.6
12.4
–40 –20
0
20
40
60
80
100
–40 –20
0
20
40
60
80
100
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 8
Figure 9
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
TYPICAL CHARACTERISTICS
PWM REFERENCE VOLTAGE
vs
FREE-AIR TEMPERATURE
PWM REGULATOR VOLTAGE
vs
FREE-AIR TEMPERATURE
5.05
5.04
5.03
5.02
5.01
5
12.53
V
= 17 V
= 10 mA
CC
V
CC
= 17 V
I
O
12.52
12.51
12.5
4.99
4.98
4.97
12.49
12.48
4.96
4.95
–40 –20
0
20
40
60
80
100
–40 –20
0
20
40
60
80
100
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 10
Figure 11
PWM RELATIVE OSCILLATOR FREQUENCY
INTEGRATING CAPACITOR CURRENT
vs
vs
FREE-AIR TEMPERATURE
FREE-AIR TEMPERATURE
1.025
1.02
1.015
1.01
1.005
1
0
–1
–2
–3
–4
–5
V
CC
= 17 V
–6
–7
–8
0.995
0.99
–40 –20
0
20
40
60
80
100
–40 –20
0
20
40
60
80
100
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 12
Figure 13
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
TYPICAL CHARACTERISTICS
PHOTODIODE CURRENT SOURCE
SENSE CURRENT SOURCE
vs
FREE-AIR TEMPERATURE
vs
FREE-AIR TEMPERATURE
12
10
0
–1
–2
–3
–4
–5
V
= 17 V
CC
I
= 10 mA
L(LED)
8
6
4
–6
–7
–8
2
0
–40 –20
0
20
40
60
80
100
–40 –20
0
20
40
60
80
100
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 14
Figure 15
PWM DEAD TIME
vs
FREE-AIR TEMPERATURE
PWM REGULATOR SHORT-CIRCUIT CURRENT
vs
FREE-AIR TEMPERATURE
170
165
160
155
150
145
18
16
14
12
10
8
6
4
2
0
140
135
130
–40 –20
0
20
40
60
80
100
–40 –20
0
20
40
60
80
100
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 16
Figure 17
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
TYPICAL CHARACTERISTICS
LOW-STATE OUTPUT VOLTAGE
vs
LOW-STATE OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
FREE-AIR TEMPERATURE
2
1.8
1.6
1.4
1.2
1
1.5
1.48
1.46
1.44
1.42
1.4
I
O
= 200 mA
V
= 17 V
= 20 mA
CC
I
O
0.8
0.6
0.4
1.38
1.36
1.34
0.2
0
1.32
1.3
–40 –20
0
20
40
60
80
100
–40 –20
0
20
40
60
80
100
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 18
Figure 19
PWM TURN-ON THRESHOLD VOLTAGE
PWM TURN-OFF THRESHOLD VOLTAGE
vs
vs
FREE-AIR TEMPERATURE
FREE-AIR TEMPERATURE
16.25
16.2
10.25
10.2
10.15
10.1
10.05
10
I
O
= 200 mA
16.15
16.1
16.05
16
15.95
15.9
9.95
9.9
15.85
9.85
15.8
9.8
15.75
9.75
–40 –20
0
20
40
60
80
100
–40 –20
0
20
40
60
80
100
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 20
Figure 21
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
TYPICAL CHARACTERISTICS
PWM THRESHOLD VOLTAGES SHOWING HYSTERESIS
vs
FREE-AIR TEMPERATURE
18
16
V
V
IT(H)
14
12
IT(L)
10
8
6
4
2
0
–40 –20
0
20
40
60
80
100
T
A
– Free-Air Temperature – °C
Figure 22
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
RT1
SECONDARY
L1
L
BR1
t°
F1
3A
C3
470 pF,
250 V
T1
AC
+
MV1
275 V
+
+
R1
C19
470 µF
C21
0.1 µF,
63 V
+
C20
100 µF,
25 V
C1
C4
120 µF,
400 V
R18
C6
680 kΩ,
0.5 W
0.33 µF,
J2
CR5
GND
OUT
250 V
IN
AC
–
5
4
– 12 V
CR6
U2
N
R9
100 Ω
uA79M12CKC
C29
0.001 µF,
100 V
C2
470 pF,
250 V
J1
GND
12 V
C16
R8
L2
3
R2
750 kΩ
CR4
+
+
C15
470 µF,
C17
100 µF,
C18
0.1 µF
2
1
GND
5 V
C10
R7
R3
4.7 Ω
L3
CR3
CR1
+
+
+
C5
C12
C11
R17
C14
0.1 µF
100 µF,
25 V
2200 µF,
470 µF,
C22
C23
Q1
IRFBC40
R12
CR7
Q2
R11
R15
1 kΩ
1
16
R14
100 Ω
C9
C13
0.1 µF
R5
0.62 Ω
15
2
3
4
5
6
7
8
C26
470 pF
R13
C24
0.1 µF
14
13
12
11
10
R16
R10
12 kΩ
C8
C27
1000 pF
U1
TIL5942,
TIL5942A
NC
CR2
C28
1 µF,
63 V
NC
NC
NC
R4
150 Ω
9
C25
0.1 µF,
63 V
C7
0.1 µF
R6
1O kΩ
Figure 23. Off-Line Power-Supply Application
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
Table 1. Bill of Materials for TIL5942 and TIL5942A Off-Line Power-Supply
ITEM
NO.
REF DES
PART NUMBER
DESCRIPTION
IC, PWM controller
VENDOR
1
U1
TIL5942NFC
Texas Instruments
Texas Instruments
International Rectifier (IR)
Teccor Electronics
Panasonic
2
U2
uA79M12CKC
IRFBC40
IC, voltage regulator
3
Q1
N-ch MOSFET 8A/600 V
4
Q2
S4015L
SCR 100 V
5
MV1
BD1
RT1
CR1
CR2
CR3
CR4
CR5
CR6
CR7
C1
ERZ-V10D431
BR86D
MOV, 275 V
6
Bridge, 2A/600 V
Diodes, Inc.
Keystone
7
CL–80
Thermistor
8
1N4148CT
Rectifier, 100mA/100 V
Diodes, Inc.
Diodes, Inc.
International Rectifier (IR)
International Rectifier (IR)
International Rectifier (IR)
Philips
9
1N4148CT
Rectifier, 100mA/100 V
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
6TQ045
Rectifier, 7.5A/45 V
31DF2
Rectifier, 3A/200 V
11DF2
Rectifier, 1A/200 V
BYV26C
Rectifier, 1A/600 V
1N5232BCT
Zener diode 5.6 V
Diodes, Inc.
Panasonic
ECQ-U2A334MV
ECK-DGL471MB
ECK-DGL471MB
ECO-S2GP121CA
ECE-A1EFS101
ECK-D3A332KBP
ECU-S2A104KBA
ECU-S2A333KBA
ECU-S2A471KBA
ECU-S2A222KBA
ECE-A1AFS471
ECA–1AFQ222
ECU-S2A104KBA
ECU-S2A104KBA
ECE-A1EFS471
ECU-S2A471KBA
ECE-A1EFS101
ECU-S2A104KBA
ECE-A1EFS471
ECE-A1EFS101
ECU-S2A104KBA
ECK-DGL471MB
ECK-DGL471MB
ECU-S2A104KBA
ECU-S2A104KBA
ECU-S2A471KBA
ECU-S1J102JCB
Capacitor, film, 0.33 µF/250Vac/20%
Capacitor, film, 470 pF/250Vac/20%
Capacitor, film, 470 pF/250Vac/20%
Capacitor, electrolytic, 120 µF/400 V
Capacitor, electrolytic, 100 µF/25 V
Capacitor, ceramic, 3300 pF/1000 V
Capacitor, ceramic, 0.1 µF/100 V
Capacitor, ceramic, 0.033 µF/100 V
Capacitor, ceramic, 470 pF/100 V
Capacitor, ceramic, 2200 pF/100 V
Capacitor, electrolytic, 470 µF/10 V
Capacitor, electrolytic, 2200 µF/10 V
Capacitor, ceramic, 0.1 µF/100 V
Capacitor, ceramic, 0.1 µF/100 V
Capacitor, electrolytic, 470 µF/25 V
Capacitor, ceramic, 470 pF/100 V
Capacitor, electrolytic, 100 µF/25 V
Capacitor, ceramic, 0.1 µF/100 V
Capacitor, electrolytic, 470 µF/25 V
Capacitor, electrolytic, 100 µF/25 V
Capacitor, ceramic, 0.1 µF/100 V
Capacitor, film, 470 pF/250Vac
Capacitor, film, 470 pF/250Vac
Capacitor, ceramic, 0.1 µF/100 V
Capacitor, ceramic, 0.1 µF/100 V
Capacitor, ceramic, 470 pF/100 V
Capacitor, ceramic, 1000 pF/63 V
C2
Panasonic
C3
Panasonic
C4
Panasonic
C5
Panasonic
C6
Panasonic
C7
Panasonic
C8
Panasonic
C9
Panasonic
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
Table 1. Bill of Materials for TIL5942 and TIL5942A Off-Line Power-Supply (Continued)
ITEM
REF DES
PART NUMBER
DESCRIPTION
VENDOR
NO.
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
C28
C29
R1
ECU-S1J105MEB
ECU-S1J102JCB
Capacitor, ceramic, 1 µF/63 V
Capacitor, ceramic, 1000 pF/100 V
Resistor, MF, 680 kΩ, 1/2 W, 5%
Resistor, MF, 750 kΩ, 2 W, 5%
Resistor, MF, 4.7 Ω, 1/4 W, 5%
Resistor, MF, 150 Ω, 1/4 W, 5%
Resistor, MF, 0.62 Ω, 1/4 W, 5%
Resistor, MF, 10 kΩ, 2 W, 5%
Resistor, MF, 47 Ω, 1/4 W, 5%
Resistor, MF, 100 Ω, 1/4 W, 5%
Resistor, MF, 100 Ω, 1/4 W, 5%
Resistor, MF, 12 kΩ, 1/4 W, 5%
Resistor, MF, 100 Ω, 1/4 W, 5%
Resistor, MF, 2.4 kΩ, 1/4 W, 5%
5 kΩ, 1/4 W, POT
Panasonic
Panasonic
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
T1
3306F-502-ND
Bourns
Resistor, MF, 100 Ω, 1 W, 5%
Resistor, MF, 100 Ω, 1/4 W, 5%
Resistor, MF, 150 kΩ, 1/4 W, 5%
Resistor, MF, 1 kΩ, 1/4 W, 5%
Resistor, MF, 4.7 kΩ, 2 W, 5%
Transformer, turns ratio
Common mode filter
CYX01-13940-X4
0571-0203-01
Colitronics
Bel
L1
L2
PCV-0-0050-10
PCV-0-0050-10
Inductor, choke
Coilcraft
Coilcraft
Bel
L3
Inductor, choke
F1
Fuse, 3AG
FH1
FH1
HS1
HS4
P1
F052-ND
Fuseclip
F052-ND
Fuseclip
PF430
Heat sink Q1
Thermalloy
Thermalloy
Power Dynamics
Waldom
PF430
Heat sink CR3
42R05-3143-150
WM4403ND
Connector, input
P2
Connector, output
JMP1
JMP2
JMP3
PWB
Strap
Strap
Strap
PC board
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
MECHANICAL DATA
NFD (R-PDSO-G14)
PLASTIC SMALL-OUTLINE PACKAGE
0.100 (2,54)
16
0.050 (1,27)
0.010 (0,25)
M
9
0.010 (0,25) NOM
0.260 (6,60)
0.240 (6,10)
0.410 (10,41)
0.390 (9,91)
1
8
Gage Plane
0.790 (20,07)
0.782 (19,86)
0.010 (0,25)
0.039 (0,99)
0.029 (0,74)
0°–8°
0.180 (4,57)
0.160 (4,06)
Seating Plane
0.004 (0,10)
0.154 (3,91)
0.146 (3,71)
0.020 (0,51) MIN
4073330/A 08/97
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
MECHANICAL DATA
NFC (R-PDIP-T14)
PLASTIC DUAL-IN-LINE PACKAGE
0.790 (20,07)
0.782 (19,86)
16
9
0.260 (6,60)
0.240 (6,10)
1
8
0.058 (1,47)
0.042 (1,07)
0.154 (3,91)
0.146 (3,71)
0.180 (4,57)
0.160 (4,06)
0.020 (0,51) MIN
Seating Plane
0.125 (3,18) NOM
0.024 (0,61)
0.016 (0,41)
0.010 (0,25)
M
0.010 (0,25) NOM
0.410 (10,41)
0.390 (9,91)
0.100 (2,54)
4110451/A 08/97
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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