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FEATURES
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1IN+
1IN-
FEEDBACK
DTC
CT
RT
GND
C1
2IN+
2IN-
REF
OUTPUT CTRL
VCC
C2
E2
E1
D, N, NS, OR PW PACKAGE
(TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
TL594PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
•Complete PWM Power-Control Circuitry•Uncommitted Outputs for 200-mA Sink orSource Current•Output Control Selects Single-Ended orPush-Pull Operation•Internal Circuitry Prohibits Double Pulse atEither Output•Variable Dead Time Provides Control OverTotal Range•Internal Regulator Provides a Stable 5-VReference Supply Trimmed to 1%•Circuit Architecture Allows EasySynchronization
•Undervoltage Lockout for Low-V
CC
Conditions
The TL594 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) controlcircuit on a single chip. Designed primarily for power-supply control, this device offers the systems engineer theflexibility 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 have a common-mode voltage range of –0.3 V to V
CC
– 2 V. The DTC comparator has afixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminatingRT to the reference output and providing a sawtooth input to CT, or it can be used to drive the common circuitryin synchronous multiple-rail power supplies.
The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Eachdevice provides for push-pull or single-ended output operation, with selection by means of the output-controlfunction. The architecture of these devices prohibits the possibility of either output being pulsed twice duringpush-pull operation. The undervoltage lockout control circuit locks the outputs off until the internal circuitry isoperational.
The TL594C is characterized for operation from 0 °C to 70 °C. The TL594I is characterized for operation from–40 °C to 85 °C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 1988–2007, Texas Instruments IncorporatedProducts conform to specifications per the terms of the TexasInstruments standard warranty. Production processing does notnecessarily include testing of all parameters.
www.ti.com
GND
REF
VCC
Reference
Regulator
C1
Pulse-Steering
Flip-Flop
C1
1D
FEEDBACK
DTC
CT
RT
PWM
Comparator
Error Amplifier 2
1
+
-
Error Amplifier 1
≈0.1 V
DTC
Comparator
Oscillator
OUTPUT CTRL
(see Function Table)
0.7 mA
E1
C2
E2
2
+
-
Undervoltage
Lockout
Control
IN+
IN-
IN+
IN-
6
5
1
2
16
15
3
14
7
12
10
11
9
8
13
4
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
ORDERING INFORMATION
(1)
T
A
PACKAGE
(2)
ORDERABLE PART NUMBER TOP-SIDE MARKING
PDIP – N Tube of 25 TL594CN TL594CNTube of 40 TL594CDSOIC – D TL594CReel of 2500 TL594CDR0°C to 70 °C
SOP – NS Reel of 2000 TL594CNSR TL594Tube of 90 TL594CPWTSSOP – PW T594Reel of 2000 TL594CPWRPDIP – N Tube of 25 TL594IN TL594INTube of 40 TL594IDSOIC – D TL594IReel of 2500 TL594IDR–40 °C to 85 °C
SOP – NS Reel of 2000 TL594INSR TL594ITube of 90 TL594IPWTSSOP – PW Z594Reel of 2000 TL594IPWR
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TIweb site at www.ti.com.(2) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available atwww.ti.com/sc/package.
FUNCTION TABLE
INPUT
OUTPUT FUNCTIONOUTPUT CTRL
V
I
= 0 Single-ended or parallel outputV
I
= V
ref
Normal push-pull operation
FUNCTIONAL BLOCK DIAGRAM
2
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ABSOLUTE MAXIMUM RATINGS
(1)
RECOMMENDED OPERATING CONDITIONS
TL594PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
over operating free-air temperature range (unless otherwise noted)
VALUE UNIT
V
CC
Supply voltage
(2)
41 VAmplifier input voltage V
CC
+ 0.3 VCollector output voltage 41 VCollector output current 250 mAD package 73N package 67θ
JA
Package thermal impedance
(3) (4)
°C/WNS package 64PW package 108T
J
Operating virtual junction temperature 150 °CT
stg
Storage temperature range –65 to 150 °C
(1) Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratingsonly, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operatingconditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2) All voltage values, except differential voltages, are with respect to the network ground terminal.(3) Maximum power dissipation is a function of T
J
(max), θ
JA
, and T
A
. The maximum allowable power dissipation at any allowable ambienttemperature is P
D
= (T
J
(max) – T
A
)/ θ
JA
. Operating at the absolute maximum T
J
of 150 °C can affect reliability.(4) The package thermal impedance is calculated in accordance with JESD 51-7.
MIN MAX UNIT
V
CC
Supply voltage 7 40 VV
I
Amplifier input voltage –0.3 V
CC
– 2 VV
O
Collector output voltage 40 VCollector output current (each transistor) 200 mACurrent into FEEDBACK terminal 0.3 mAC
T
Timing capacitor 0.47 10000 nFR
T
Timing resistor 1.8 500 k Ωf
osc
Oscillator frequency 1 300 kHzTL594C 0 70T
A
Operating free-air temperature °CTL594I –40 85
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s+
ȍ
N
n+1(xn*X)2
N*1
Ǹ
ELECTRICAL CHARACTERISTICS
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
V
CC
= 15 V, over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS
(1)
MIN TYP
(2)
MAX UNIT
Reference Section
Output voltage (REF) I
O
= 1 mA, T
A
= 25 °C 4.95 5 5.05 VInput regulation V
CC
= 7 V to 40 V, T
A
= 25 °C 2 25 mVOutput regulation I
O
= 1 mA to 10 mA, T
A
= 25 °C 14 35 mVOutput-voltage change with temperature ∆T
A
= MIN to MAX 2 10 mV/VShort-circuit output current
(3)
V
ref
= 0 10 35 50 mA
Amplifier Section (see Figure 1 )
Input offset voltage, error amplifier FEEDBACK = 2.5 V 2 10 mVInput offset current FEEDBACK = 2.5 V 25 250 nAInput bias current FEEDBACK = 2.5 V 0.2 1 µACommon-mode input voltage range, 0.3 toV
CC
= 7 V to 40 V Verror amplifier V
CC
– 2Open-loop voltage amplification,
∆V
O
= 3 V, R
L
= 2 k Ω, V
O
= 0.5 V to 3.5 V 70 95 dBerror amplifier
Unity-gain bandwidth V
O
= 0.5 V to 3.5 V, R
L
= 2 k Ω800 kHzCommon-mode rejection ratio,
V
CC
= 40 V, T
A
= 25°C 65 80 dBerror amplifier
Output sink current, FEEDBACK V
ID
= –15 mV to –5 V, FEEDBACK = 0.5 V 0.3 0.7 mAOutput source current, FEEDBACK V
ID
= 15 mV to 5 V, FEEDBACK = 3.5 V –2 mA
Oscillator Section, C
T
= 0.01 µF, R
T
= 12 k Ω(see Figure 2 )
Frequency 10 kHzStandard deviation of frequency
(4)
All values of V
CC
, C
T
, R
T
, and T
A
constant 100 Hz/kHzFrequency change with voltage V
CC
= 7 V to 40 V, T
A
= 25 °C 1 Hz/kHzFrequency change with temperature
(5)
∆T
A
= MIN to MAX 50 Hz/kHz
Dead-Time Control Section (see Figure 2 )
Input bias current V
I
= 0 to 5.25 V –2 –10 µAMaximum duty cycle, each output DTC = 0 V 0.45Zero duty cycle 3 3.3Input threshold voltage VMaximum duty cycle 0
Output Section
V
C
= 40 V, V
E
= 0 V, V
CC
= 40 V 2 100Collector off-state current µADTC and OUTPUT CTRL = 0 V, V
C
= 15 V,
4 200V
E
= 0 V, V
CC
= 1 V to 3 VEmitter off-state current V
CC
= V
C
= 40 V, V
E
= 0 –100 µACommon emitter, V
E
= 0, I
C
= 200 mA 1.1 1.3Collector-emitter saturation voltage VEmitter follower, V
C
= 15 V, I
E
= –200 mA 1.5 2.5Output control input current V
I
= V
ref
3.5 mA
(1) For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.(2) All typical values, except for parameter changes with temperature, are at T
A
= 25 °C.(3) Duration of the short circuit should not exceed one second.(4) Standard deviation is a measure of the statistical distribution about the mean, as derived from the formula:
(5) Temperature coefficient of timing capacitor and timing resistor is not taken into account.
4
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SWITCHING CHARACTERISTICS
PARAMETER MEASUREMENT INFORMATION
+
-
+
-
VI
Vref
FEEDBACK
Amplifier Under Test
Other Amplifier
TL594PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
ELECTRICAL CHARACTERISTICS (continued)V
CC
= 15 V, over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS
(1)
MIN TYP
(2)
MAX UNIT
PWM Comparator Section (see Figure 2 )
Input threshold voltage, FEEDBACK Zero duty cycle 4 4.5 VInput sink current, FEEDBACK FEEDBACK = 0.5 V 0.3 0.7 mA
Undervoltage Lockout Section (see Figure 2 )
T
A
= 25 °C 6Threshold voltage V∆T
A
= MIN to MAX 3.5 6.9Hysteresis
(6)
100 mV
Overall Device
V
CC
= 15 V 9 15R
T
at V
ref
,Standby supply current mAAll other inputs and outputs open
V
CC
= 40 V 11 18Average supply current DTC = 2 V, See Figure 2 12.4 mA
(6) Hysteresis is the difference between the positive-going input threshold voltage and the negative-going input threshold voltage.
V
CC
= 15 V, T
A
= 25 °C, over recommended operating conditions (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Output-voltage rise time 100 200 nsCommon-emitter configuration (see Figure 3 )Output-voltage fall time 30 100 nsOutput-voltage rise time 200 400 nsEmitter-follower configuration (see Figure 4 )Output-voltage fall time 45 100 ns
Figure 1. Amplifier-Characteristics Test Circuit
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Test
Inputs
DTC
FEEDBACK
RT
CT
GND
50 kW
12 kW
0.01 µF
VCC
REF
OUTPUT
CTRL
E2
C2
E1
C1 Output 1
Output 2
150 W
2 W
150 W
2 W
VCC = 15 V
TEST CIRCUIT
IN+
IN-
IN+
IN-
VCC
VCC
0 V
0 V
Voltage
at C1
Voltage
at C2
Voltage
at CT
DTC Input
Feedback
Input
0 V
0.7 V
0%
MAX 0%
Threshold Voltage
Threshold Voltage
VOLTAGE WAVEFORMS
Duty Cycle
TL594
12
4
3
6
5
1
2
16
15
13
7
14
10
11
9
8
Error
Amplifiers
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
PARAMETER MEASUREMENT INFORMATION (continued)
Figure 2. Operational Test Circuit and Waveforms
6
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Output
Each Output
Circuit
68 W
2 W
15 V
CL= 15 pF
(includes probe and
jig capacitance)
90%
10%
90%
10%
tftr
TEST CIRCUIT OUTPUT-VOLTAGE WAVEFORM
Output
Each Output
Circuit
68 W
2 W
15 V
CL= 15 pF
(includes probe and
jig capacitance)
90%
10%
90%
10%
tf
tr
TEST CIRCUIT OUTPUT-VOLTAGE WAVEFORM
TL594PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
PARAMETER MEASUREMENT INFORMATION (continued)
Figure 3. Common-Emitter Configuration
Figure 4. Emitter-Follower Configuration
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TYPICAL CHARACTERISTICS
10
0
100
20
1 10 100 1 M
Voltage Amplification - dB
30
f - Frequenc y - Hz
1 k
VCC = 15 V
∆VO= 3 V
TA= 25°C
10 k
40
50
60
70
80
90
100 k
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
OSCILLATOR FREQUENCY AND FREQUENCY VARIATION
(A)
vsTIMING RESISTANCE
A. Frequency variation ( ∆f) is the change in oscillator frequency that occurs over the full temperature range.Figure 5.
AMPLIFIER VOLTAGE AMPLIFICATION
vsFREQUENCY
Figure 6.
8
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APPLICATION INFORMATION
How to Set Dead Time
T = R C (0.05 + 0.35R2)
R2 in k
R1 + R2 = 5 k
D T T
W
W
VREF
Dead-Time Control In
R1
R2
TL594PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
The primary function of the dead-time control is to control the minimum off time of the output of the TL594. Thedead-time control input provides control from 5% to 100% dead time. The TL594 can be tailored to the specificpower transistor switches that are used, to ensure that the output transistors never experience a commonon-time. The bias circuit for the basic function is shown in Figure 7 .
Figure 7. Setting Dead Time
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PACKAGE OPTION ADDENDUM
www.ti.com 4-Apr-2011
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
TL594CD ACTIVE SOIC D 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CDE4 ACTIVE SOIC D 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CDG4 ACTIVE SOIC D 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CDR ACTIVE SOIC D 16 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CDRE4 ACTIVE SOIC D 16 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CDRG3 PREVIEW SOIC D 16 TBD Call TI Call TI
TL594CDRG4 ACTIVE SOIC D 16 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CN ACTIVE PDIP N 16 25 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
TL594CNE4 ACTIVE PDIP N 16 25 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
TL594CNSR ACTIVE SO NS 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CNSRE4 ACTIVE SO NS 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CNSRG4 ACTIVE SO NS 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CPW ACTIVE TSSOP PW 16 90 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CPWE4 ACTIVE TSSOP PW 16 90 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CPWG4 ACTIVE TSSOP PW 16 90 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CPWR ACTIVE TSSOP PW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CPWRE4 ACTIVE TSSOP PW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594CPWRG4 ACTIVE TSSOP PW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
PACKAGE OPTION ADDENDUM
www.ti.com 4-Apr-2011
Addendum-Page 2
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
TL594ID ACTIVE SOIC D 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594IDE4 ACTIVE SOIC D 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594IDG4 ACTIVE SOIC D 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594IDR ACTIVE SOIC D 16 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594IDRE4 ACTIVE SOIC D 16 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594IDRG4 ACTIVE SOIC D 16 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594IN ACTIVE PDIP N 16 25 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
TL594INE4 ACTIVE PDIP N 16 25 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
TL594INSR ACTIVE SO NS 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594INSRG4 ACTIVE SO NS 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594IPWR ACTIVE TSSOP PW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594IPWRE4 ACTIVE TSSOP PW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL594IPWRG4 ACTIVE TSSOP PW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
PACKAGE OPTION ADDENDUM
www.ti.com 4-Apr-2011
Addendum-Page 3
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
TL594CDRG4 SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1
TL594CNSR SO NS 16 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1
TL594CPWR TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1
TL594IDR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1
TL594INSR SO NS 16 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1
TL594IPWR TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
TL594CDRG4 SOIC D 16 2500 333.2 345.9 28.6
TL594CNSR SO NS 16 2000 367.0 367.0 38.0
TL594CPWR TSSOP PW 16 2000 367.0 367.0 35.0
TL594IDR SOIC D 16 2500 333.2 345.9 28.6
TL594INSR SO NS 16 2000 367.0 367.0 38.0
TL594IPWR TSSOP PW 16 2000 367.0 367.0 35.0
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 2
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