UNISONIC TECHNOLOGIES CO., LTD TL594

UNISONIC TECHNOLOGIES CO., LTD
TL594
LINEAR INTEGRATED CIRCUIT
PULSE-WIDTH-MODULATION
CONTROL CIRCUIT

SOP-16
DESCRIPTION
The UTC TL594 is a PWM (Pulse Width Modulation) control
circuit, incorporating two error amplifiers, an on-chip adjustable
oscillator, a DTC (Deadtime Control) comparator, a pulse-steering
control flip-flop, a regulator rated 5V with 1% accuracy, an UVLO
(Undervoltage Lockout) control circuit and an output control circuit.
The two error amplifiers have a common-mode voltage varies
from -0.3 V to VCC-2 V. The DTC comparator with a fixed-offset
offers dead time nearly 5%. The UVLO circuit forbids the output until
the internal circuitry is operational. The internal oscillator is used to
drive the common circuits in synchronous multiple-rail power
supplies, when be bypassed by terminating RT to the reference
output and providing an external input of sawtooth to CT.
The uncommitted output transistors have the capabilities of either
common-emitter or emitter-follower output. The output control can
select the push-pull or single-ended output operation for each
device. This chip is not allowed to appear the double pulse status for
either output during push-pull output operation due to its structure.
The UTC TL594 is generally used for the power supply control
circuits, which apply to a large area.

DIP-16
FEATURES
* Adjustable dead time
* Uncommitted outputs transistor rated to 200mA sink or source
current
* Single-Ended or Push-Pull operation selected by output control
* Double pulse is not allowed at either output due to its architecture
* 5V Internal reference voltage (1% accuracy)
* UVLO under the low VCC status

ORDERING INFORMATION
Order Number
Lead Free
TL594L-D16-T
-
Halogen Free
TL594G-D16-T
TL594G-S16-R
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Copyright © 2014 Unisonic Technologies Co., Ltd
Package
Packing
DIP-16
SOP-16
Tube
Tape Reel
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QW-R103-031.C
TL594

LINEAR INTEGRATED CIRCUIT
MARKING
DIP-16
PIN CONFIGURATION
1IN+
1
16
2IN+
1IN-
2
15
2IN-
FEEDBACK
3
14
REF
DTC
4
13 OUTPUT CTRL
CT
5
12
VCC
RT
6
11
C2
GND
7
10
E2
8

SOP-16
9
E1
C1
PIN NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PIN NAME
1IN+
1INREEDBACK
DTC
CT
RT
GND
C1
E1
E2
C2
VCC
Output CTRL
REF
2IN2IN+
DESCRIPTION
The noninv input of error amp 1
The inv input of error amp 1
Input of Feedback PWM Comparator
The deadtime can be set by changing the voltage of this pin
A capacitor connected to this pin sets the fixed switching frequency
A resistor connected to this pin sets the fixed switching frequency
This is gnd pin
Collector of output transistors Q1
Emitter of output transistors Q1
Emitter of output transistors Q2
Collector of output transistors Q2
This pin is connected to the IC supply power.
A external signal connect to this pin can control the state of output
Internal reference voltage 5V with 1.5% accuracy
The inv input of error amp 2
The noninv input of error amp 2
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TL594
LINEAR INTEGRATED CIRCUIT

BLOCK DIAGRAM

FUNCTION TABLE
INPUT
Output CTRL
VI = 0
VI = VREF
OUTPUT FUNCTION
Single-Ended or Parallel Output
Normal Push-Pull Operation
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TL594

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
41
V
Amplifier Input Voltage
VIN
VCC + 0.3
V
Collector Output Voltage
VC1, VC2
41
V
Collector Output Current
IC1, IC2
250
mA
Junction Temperature
TJ
+150
°C
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-65 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
DIP-16
67
Junction to Ambient (Note)
θJA
°C/W
SOP-16
64
Note: Maximum power dissipation is a function of TJ(MAX), θJA, and Ta. The maximum allowable power dissipation at
any allowable ambient temperature is PD = (TJ(MAX) -Ta)/θJA. Operating at the absolute maximum TJ of 150°C
can affect reliability.

RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
Amplifier Input Voltage
Collector Output Voltage
Collector Output Current (Each Transistor)
Current Into Feedback Terminal
Timing Capacitor
Timing Resistor
Oscillator Frequency

SYMBOL
VCC
VIN
VC1, VC2
IC1, IC2
lFB
CT
RT
fOSC
MIN
7
-0.3
TYP.
MAX
40
VCC-2
40
200
0.3
10000
500
300
0.47
1.8
1
UNIT
V
V
V
mA
mA
nF
kΩ
kHz
ELECTRICAL CHARACTERISTICS ( VCC=15V, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
REFERENCE SECTION
Output Voltage (REF)
VREF
IOUT = 1mA, Ta = 25°C
Input Regulation
∆VOUT
VCC = 7V~40V, Ta = 25°C
Output Regulation
∆VOUT
IOUT = 1~10mA, Ta = 25°C
Output-Voltage Change with
∆Ta =Min~Max
Temperature
Short-Circuit Output Current (Note)
ISC
VREF = 0V
OSCILLATOR SECTION, CT = 0.01μF, RT = 12KΩ (See Figure 1)
Frequency
fOSC
All values of VCC, CT, RT, and
Standard Deviation of Frequency
σfOSC
(Note)
Ta constant
Frequency Change With Voltage
∆fOSC(∆V) VCC = 7V ~ 40V, Ta = 25°C
Frequency Change With
∆fOSC (∆T) ∆Ta =Min~Max
Temperature
DEAD-TIME CONTROL SECTION (See Figure 1)
Input Bias Current
IIB (DT)
VIN= 0 ~ 5.25V
Maximum Duty Cycle, Each Output
DCMAX
DTC = 0V
Zero Duty Cycle
Input Threshold Voltage
VTH
Maximum Duty Cycle
UNISONIC TECHNOLOGIES CO., LTD
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MIN
TYP
MAX
UNIT
4.95
5
2
14
5.05
25
35
V
mV
mV
2
10
mV/V
35
50
mA
10
10
kHz
100
Hz/kHz
1
Hz/kHz
50
Hz/kHz
-2
-10
μA
3
3.3
V
V
0.45
0
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LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
OUTPUT SECTION
Collector-Emitter Common Emitter
Saturation Voltage Emitter Follower
Collector Off-State Current
SYMBOL
VSAT(C)
VSAT(E)
IC(OFF)
TEST CONDITIONS
VE=0, IC=200mA
VC=15V, IE=−200mA
VC=40V, VE=0V, VCC=40V
DTC and Output CTRL = 0V,
VC=15V, VE=0V, VCC=1~3V
VCC=VC=40V, VE=0
VIN=VREF
MIN
TYP
MAX
UNIT
1.1
1.5
2
1.3
2.5
100
V
V
μA
4
200
μA
Emitter Off-State Current
IE(OFF)
-100
μA
Output Control Input Current
IOC
3.5
mA
PWM COMPARATOR SECTION (See Figure 1)
Input Threshold Voltage
VTH
Zero duty cycle
4
4.5
V
Input Sink Current
II(SINK)
FEEDBACK = 0.5V
0.3
0.7
mA
UNDERVOLTAGE LOCKOUT SECTION (See Figure 1)
Ta = 25°C
6
V
Threshold Voltage
VTH
∆Ta =Min~Max
3.5
6.9
V
Hysteresis
VHYS
100
mV
OVERALL DEVICE
RT at VREF
VCC = 15V
9
15
mA
All Other Inputs
Standby Supply Current
ISTN-BY
11
18
mA
And Outputs Open VCC = 40V
Average Supply Current
DTC = 2V, See Figure 1
12.4
mA
AMPLIFIER SECTION (See Figure 2)
Input Offset Voltage, Error Amplifier
VI(OFF)
FEEDBACK = 2.5V
2
10
mV
Input Offset Current
II(OFF)
FEEDBACK = 2.5V
25
250
nA
Input Bias Current
IIB
FEEDBACK = 2.5V
0.2
1
μA
0.3 to
Common-Mode Input Voltage
VICR
V
VCC=7V~40V
VCC-2
Range, Error Amplifier
∆VOUT=3V, RL =2kΩ,
Open-Loop Voltage Amplification
AVOL
70
95
dB
Gain, Error Amplifier
VOUT = 0.5V~3.5V
Unity-Gain Bandwidth
BW
VOUT = 0.5V ~3.5V, RL =2kΩ
800
kHz
Common-Mode Rejection Ratio,
CMRR VCC = 40V, Ta=25°C
65
80
dB
Error Amplifier
VID =-15mV~-5V,
0.3
0.7
mA
Output Sink Current, FEEDBACK
IO(SINK)
FEEDBACK = 0.5V
VID = 15mV~5V,
-2
mA
Output Source Current, FEEDBACK IO(SOURCE)
FEEDBACK = 3.5V
SWITCHING CHARACTERISTICS, Ta = 25°C
Output-Voltage Rise Time
Tr
200
400
ns
Emitter-Follower Configuration
(see Figure 3)
Output-Voltage Fall Time
Tf
45
100
ns
Output-Voltage Rise Time
Tr
100
200
ns
Common-Emitter Configuration
(see Figure 4)
Output-Voltage Fall Time
Tf
30
100
ns
Note: Standard deviation is a measure of the statistical distribution about the mean, as derived from the formula:
σ=
∑Nn=1( Xn - X)2
N-1
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www.unisonic.com.tw
5 of 9
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TL594

LINEAR INTEGRATED CIRCUIT
PARAMETER MEASUREMENT INFORMATION
VCC=15V
150Ω
2W
12
VCC
Test Input
4
Test Input
3 FEEDBACK
E1 9
6
C2
12kΩ
0.01μF
C1 8
DTC
RT
5 C
T
E2
1 IN+
2 IN16 IN+
11
150Ω
2W
Output 1
Output 2
10
Error
Amplifiers
15 IN-
13 Output CTRL
REF 14
GND
7
50kΩ
Figure 1. Operational Test Circuit
Figure 2.
Amplifier-Characteristics Test Circuit
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TL594

LINEAR INTEGRATED CIRCUIT
PARAMETER MEASUREMENT INFORMATION(Cont.)
Test Circuit
Output-Voltage Waveform
15V
90%
Each Output
Circuit
90%
10%
10%
Output
68Ω
2W
CL=15pF
(Includes Probe and
Jig Capacitance )
tR
tF
Figure 3. Emitter-Follower Configuration
Test Circuit
Output-Voltage Waveform
tF
90%
10%
tR
90%
10%
Figure 4. Common-Emitter Configuration
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TL594

LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATIONS INFORMATION
+
Note: All capacitors in μF
Push-Pull Operation
Single-Ended Operation
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TYPICAL CHARACTERISTIC
Oscillator Frequency (Hz)

LINEAR INTEGRATED CIRCUIT
Note: Frequency variation (∆f) is the change in oscillator frequency that occurs over the full temperature range.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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www.unisonic.com.tw
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