TL594IDR [TI]
PULSE-WIDTH-MODULATION CONTROL CIRCUITS; 脉宽调制控制电路
| 型号： | TL594IDR |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| 文件： | 总12页 (文件大小：168K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
Complete PWM Power Control Circuitry
D OR N PACKAGE
(TOP VIEW)
Uncommitted Outputs for 200-mA Sink or
Source Current
1IN+
1IN–
2IN+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Output Control Selects Single-Ended or
Push-Pull Operation
2IN–
FEEDBACK
DTC
REF
Internal Circuitry Prohibits Double Pulse at
Either Output
OUTPUT CTRL
CT
V
CC
Variable Dead Time Provides Control Over
Total Range
RT
C2
E2
E1
GND
C1
Internal Regulator Provides a Stable 5-V
Reference Supply Trimmed to 1%
Circuit Architecture Allows Easy
Synchronization
Undervoltage Lockout for Low V
Conditions
CC
description
The TL594 incorporates all the functions required in the construction of a pulse-width-modulation control circuit
on a single chip. Designed primarily for power-supply control, these devices offer the systems engineer the
flexibility to tailor the power-supply control circuitry to a specific application.
The TL594 contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC)
comparator, a pulse-steering control flip-flop, a 5-V regulator with a precision of 1%, an undervoltage lockout
control circuit, and output control circuitry.
The error amplifiers exhibit a common-mode voltage range from –0.3 V to V
–2 V. The DTC comparator has
CC
a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating
RT to the reference output and providing a sawtooth input to CT, or it can be used to drive the common circuitry
in synchronous multiple-rail power supplies.
The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Each
device provides for push-pull or single-ended output operation, with selection by means of the output-control
function. The architecture of these devices prohibits the possibility of either output being pulsed twice during
push-pull operation. The undervoltage lockout control circuit locks the outputs off until the internal circuitry is
operational.
The TL594C is characterized for operation from 0°C to 70°C. The TL594I is characterized for operation from
–40°C to 85°C.
FUNCTION TABLE
INPUT
OUTPUT FUNCTION
OUTPUT
CTRL
V = –0
Single-ended or parallel output
Normal push-pull operation
I
V = V
I ref
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.
Copyright 1999, 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
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP FORM
(Y)
T
A
SMALL OUTLINE
(D)
PLASTIC DIP
(N)
0°C to 70°C
TL594CD
TL594ID
TL594CN
TL594IN
TL594Y
–40°C to 85°C
The D package is available taped and reeled. Add “R” suffix to device type (e.g.,
TL594CDR). Chip forms are tested at 25°C.
functional block diagram
OUTPUT CTRL
(see Function Table)
13
6
5
RT
CT
Oscillator
8
9
1D
C1
E1
DTC
Comparator
≈ 0.1 V
4
DTC
C1
11
10
PWM
Comparator
C2
E2
Error Amplifier 1
1
2
IN+
IN–
+
1
Pulse-Steering
Flip-Flop
–
12
Error Amplifier 2
+
V
CC
Undervoltage
Lockout
16
15
IN+
IN–
2
Control
–
Reference
Regulator
14
7
REF
3
FEEDBACK
GND
0.7 mA
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
TL594X
41
UNIT
V
Supply voltage, V
CC
(see Note 1)
Amplifier input voltage
Collector output voltage
Collector output current
V
CC
+0.3
41
V
V
250
73
mA
D package
N package
Package thermal impedance, θ (see Notes 2 and 3)
°C
JA
88
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
260
°C
°C
Storage temperature range, T
stg
–65 to 150
†
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.
NOTES: 1. All voltage values, except differential voltages, are with respect to the network ground terminal.
2. Maximum power dissipation is a function of T (max), θ , and T . The maximum allowable power dissipation at any allowable
J
JA
A
ambient temperature is P = (T (max) – T )/θ . Operating at the absolute maximum T of 150°C can impact reliability.
D
J
A
JA
J
3. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
recommended operating conditions
MIN
7
MAX
UNIT
V
Supply voltage, V
CC
40
Amplifier input voltage, V
–0.3
V
CC
–2
40
V
I
Collector output voltage, V
V
O
Collector output current (each transistor)
200
0.3
mA
mA
nF
kΩ
kHz
°C
Current into feedback terminal
Timing capacitor, C
0.47
1.8
1
10000
500
300
70
T
Timing resistor, R
T
Oscillator frequency, f
osc
TL594C
TL594I
0
Operating free-air temperature, T
A
–40
85
°C
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
electrical characteristics over recommended operating conditions, V
(unless otherwise noted)
= 15 V,
CC
reference section
TL594C, TL594I
†
PARAMETER
UNIT
TEST CONDITIONS
‡
MIN TYP
MAX
5.05
25
Output voltage (REF)
Input regulation
I
= 1 mA,
T
= 25°C
4.95
5
2
V
O
A
V
= 7 V to 40 V,
CC
= 1 to 10 mA,
T
= 25°C
= 25°C
A
mV
mV
A
Output regulation
I
O
T
14
2
35
Output-voltage change with temperature
∆T = MIN to MAX
10 mV/V
A
§
Short-circuit output current
V
ref
= 0
10
35
50
mA
†
‡
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values except for parameter changes with temperature are at T = 25°C.
A
Duration of the short circuit should not exceed one second.
amplifier section (see Figure 1)
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
‡
MIN TYP
MAX
10
Input offset voltage, error amplifier
Input offset current
FEEDBACK = 2.5 V
FEEDBACK = 2.5 V
FEEDBACK = 2.5 V
2
mV
nA
µA
25
250
1
Input bias current
0.2
0.3
to
Common-mode input voltage range,
error amplifier
V
CC
= 7 V to 40 V
V
V
–2
CC
Open-loop voltage amplification, error
amplifier
∆V = 3 V,
R
R
= 2 kΩ,
= 2 kΩ
= 25°C
V = 0.5 V to 3.5 V
O
70
95
800
80
dB
kHz
dB
O
L
L
Unity-gain bandwidth
V
V
= 0.5 V to 3.5 V,
O
Common-mode rejection ratio, error
amplifier
= 40 V,
T
A
65
CC
Output sink current, FEEDBACK
Output source current, FEEDBACK
V
V
= –15 mV to –5 V, FEEDBACK = 0.5 V
0.3
–2
0.7
mA
mA
ID
= 15 mV to 5 V,
FEEDBACK = 3.5 V
ID
‡
All typical values except for parameter changes with temperature are at T = 25°C.
A
oscillator section, C = 0.01 µF, R = 12 kΩ (see Figure 2)
T
T
TL594C, TL594I
†
PARAMETER
UNIT
TEST CONDITIONS
‡
MIN TYP
MAX
Frequency
10
100
1
kHz
¶
Standard deviation of frequency
All values of V , C , R , and T constant
Hz/kHz
Hz/kHz
CC
T
T
A
Frequency change with voltage
V
CC
= 7 V to 40 V,
T = 25°C
A
#
Frequency change with temperature
∆T = MIN to MAX
A
50 Hz/kHz
†
‡
¶
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values except for parameter changes with temperature are at T = 25°C.
A
Standard deviation is a measure of the statistical distribution about the mean as derived from the formula:
N
2
X)
(x
n
n
1
N
1
#
Temperature coefficient of timing capacitor and timing resistor not taken into account.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
electrical characteristics over recommended operating free-air temperature range, V
(unless otherwise noted)
= 15 V,
CC
dead-time control section (see Figure 2)
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
Input bias current
V = 0 to 5.25 V
I
–2
–10
µA
Maximum duty cycle, each output
DTC = 0 V
0.45
0
Zero duty cycle
Maximum duty cycle
3
3.3
Input threshold voltage
V
†
All typical values except for parameter changes with temperature are at T = 25°C.
A
output section
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
V
C
= 40 V,
V
= 0 V,
V
CC
= 40 V
2
100
E
Collector off-state current
µA
DTC and OUTPUT CTRL = 0 V,
4
200
V
V
V
V
= 15 V,
V
= 0 V,
V
= 1 to 3 V
C
E
CC
= 0
Emitter off-state current
= V = 40 V,
C
V
–100
1.3
µA
V
CC
E
Common emitter
Emitter follower
= 0,
I
= 200 mA
1.1
1.5
E
C
C
E
Collector-emitter saturation voltage
= 15 V,
I
= –200 mA
2.5
Output control input current
V = V
I ref
3.5
mA
†
All typical values except for parameter changes with temperature are at T = 25°C.
A
pwm comparator section (see Figure 2)
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
Input threshold voltage, FEEDBACK
Input sink current, FEEDBACK
Zero duty cycle
4
4.5
V
FEEDBACK = 0.5 V
0.3
0.7
mA
†
All typical values except for parameter changes with temperature are at T = 25°C.
A
undervoltage lockout section (see Figure 2)
TL594C, TL594I
‡
PARAMETER
TEST CONDITIONS
UNIT
MIN
MAX
6
T
A
= 25°C
Threshold voltage
V
∆T = MIN to MAX
A
3.5
6.9
§
Hysteresis
100
mV
‡
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
Hysteresis is the difference between the positive-going input threshold voltage and the negative-going input threshold voltage.
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
15
V
V
= 15 V
= 40 V
9
RT at V
,
CC
ref
Standby supply current
Average supply current
mA
mA
All other inputs and outputs open
11
18
CC
DTC = 2 V,
See Figure 2
12.4
†
All typical values except for parameter changes with temperature are at T = 25°C.
A
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
electrical characteristics over recommended operating free-air temperature range, V
(unless otherwise noted) (continued)
= 15 V,
CC
switching characteristics, T = 25°C
A
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
Output-voltage rise time
100
30
200
100
400
100
ns
ns
ns
ns
Common-emitter configuration (see Figure 3
Emitter-follower configuration (see Figure 4)
Output-voltage fall time
Output-voltage rise time
Output-voltage fall time
200
45
†
All typical values except for parameter changes with temperature are at T = 25°C.
A
electrical characteristics over recommended operating conditions, V
(unless otherwise noted)
= 15 V, T = 25°C
CC
A
reference section
TL594Y
PARAMETER
TEST CONDITIONS
= 1 mA
UNIT
MIN
TYP
5
MAX
Output voltage (REF)
Input regulation
I
O
V
V
= 7 V to 40 V
2
mV
mV
mA
CC
= 1 to 10 mA
Output regulation
I
O
14
35
‡
Short-circuit output current
V
ref
= 0
‡
Duration of the short circuit should not exceed one second.
oscillator section, C = 0.01 µF, R = 12 kΩ (see Figure 2)
T
T
TL594Y
TYP
10
PARAMETER
TEST CONDITIONS
UNIT
MIN
MAX
Frequency
kHz
§
Standard deviation of frequency
Frequency change with voltage
All values of V , C , R , and T constant
100
1
Hz/kHz
Hz/kHz
CC
T
T
A
V
CC
= 7 V to 40 V
§
Standard deviation is a measure of the statistical distribution about the mean as derived from the formula:
N
2
X)
(x
n
n
1
N
1
amplifier section (see Figure 1)
TL594Y
TYP
2
PARAMETER
TEST CONDITIONS
UNIT
MIN
MAX
Input offset voltage, error amplifier
Input offset current
FEEDBACK = 2.5 V
FEEDBACK = 2.5 V
FEEDBACK = 2.5 V
mV
nA
µA
25
Input bias current
0.2
Open-loop voltage amplification, error
amplifier
∆V = 3 V,
R
R
= 2 kΩ,
= 2 kΩ
= 25°C
V = 0.5 V to 3.5 V
O
95
800
80
dB
kHz
dB
O
L
L
Unity-gain bandwidth
V
V
V
= 0.5 V to 3.5 V,
O
Common-mode rejection ratio, error
amplifier
= 40 V,
T
A
CC
Output sink current, FEEDBACK
= –15 mV to –5 V,
FEEDBACK = 0.5 V
0.7
mA
ID
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
electrical characteristics over recommended operating free-air temperature range, V
A
= 15 V,
CC
T = 25°C (unless otherwise noted)
dead-time control section (see Figure 2)
TL594Y
TYP
–2
PARAMETER
TEST CONDITIONS
UNIT
MIN
MAX
Input bias current
V = 0 to 5.25 V
I
µA
Input threshold voltage
Zero duty cycle
3
V
output section
TL594Y
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
V
C
= 40 V,
V
= 0 V,
V
CC
= 40 V
2
E
Collector off-state current
Emitter off-state current
µA
DTC and OUTPUT CTRL = 0 V,
4
V
V
V
V
= 15 V,
V
= 0 V,
V
E
= 1 to 3 V
C
E
CC
= 0
= V = 40 V,
C
V
µA
CC
Common emitter
Emitter follower
= 0,
I
I
= 200 mA
1.1
1.5
E
C
C
E
Collector-emitter saturation voltage
V
= 15 V,
= –200 mA
pwm comparator section (see Figure 2)
TL594Y
TYP
4
PARAMETER
TEST CONDITIONS
UNIT
MIN
MIN
MAX
MAX
Input threshold voltage, FEEDBACK
Input sink current, FEEDBACK
Zero duty cycle
FEEDBACK = 0.5 V
V
0.7
mA
total device (see Figure 2)
TL594Y
TYP
9
PARAMETER
TEST CONDITIONS
UNIT
Standby supply current
Average supply current
All other inputs and outputs open,
DTC = 2 V,
R
T
at V
ref
mA
mA
See Figure 2
12.4
switching characteristics, T = 25°C
A
TL594Y
TYP
100
PARAMETER
TEST CONDITIONS
UNIT
MIN
MAX
Output-voltage rise time
ns
ns
ns
ns
Common-emitter configuration (see Figure 3)
Emitter-follower configuration (see Figure 4)
Output-voltage fall time
Output-voltage rise time
Output-voltage fall time
30
200
45
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
PARAMETER MEASUREMENT INFORMATION
Amplifier Under Test
+
V
I
FEEDBACK
–
+
V
ref
–
Other Amplifier
Figure 1. Amplifier-Characteristics Test Circuit
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
PARAMETER MEASUREMENT INFORMATION
V
CC
= 15 V
150
Ω
2 W
150
Ω
2 W
12
V
CC
4
3
8
9
Output 1
C1
E1
DTC
FEEDBACK
TL594
Test
Inputs
12 kΩ
6
5
11
10
C2
E2
Output 2
RT
CT
0.01 µF
1
IN+
IN–
IN+
IN–
2
Error
Amplifiers
16
15
13
14
OUTPUT
CTRL
REF
GND
7
50 kΩ
TEST CIRCUIT
V
CC
Voltage
at C1
0 V
V
CC
Voltage
at C2
0 V
Voltage
at CT
Threshold Voltage
DTC Input
0 V
Threshold Voltage
Feedback
Input
0.7 V
0%
Duty Cycle
MAX
0%
VOLTAGE WAVEFORMS
Figure 2. Operational Test Circuit and Waveforms
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
PARAMETER MEASUREMENT INFORMATION
15 V
t
68 Ω
2 W
f
t
r
Each Output
Circuit
Output
= 15 pF
(includes probe and
jig capacitance)
90%
90%
C
L
10%
10%
TEST CIRCUIT
OUTPUT-VOLTAGE WAVEFORM
Figure 3. Common-Emitter Configuration
15 V
Each Output
Circuit
90%
90%
10%
10%
Output
68 Ω
2 W
t
f
t
r
C
= 15 pF
L
(includes probe and
jig capacitance)
TEST CIRCUIT
OUTPUT-VOLTAGE WAVEFORM
Figure 4. Emitter-Follower Configuration
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
TYPICAL CHARACTERISTICS
OSCILLATOR FREQUENCY AND
†
FREQUENCY VARIATION
vs
TIMING RESISTANCE
100 k
40 k
V
T
= 15 V
CC
= 25°C
A
–2%
0.001 µF
–1%
10 k
4 k
0.01 µF
0%
0.1 µF
1 k
400
†
∆f = 1%
100
40
C
= 1 µF
T
10
1 k
4 k
10 k
40 k 100 k
400 k 1 M
R
– Timing Resistance – Ω
T
†
Frequency variation (∆f) is the change in oscillator frequency that occurs over the full temperature range.
Figure 5
AMPLIFIER VOLTAGE AMPLIFICATION
vs
FREQUENCY
100
V
= 15 V
CC
O
90
80
70
60
50
40
30
20
10
0
∆V = 3 V
T
A
= 25°C
1
10
100
1 k
10 k
1 M
100 k
f – Frequency – Hz
Figure 6
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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pertaining to warranty, patent infringement, and limitation of liability.
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
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Copyright 1999, Texas Instruments Incorporated
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