UNISONIC TECHNOLOGIES CO., LTD
TL594
PULSE-WIDTH-MODULATION
CONTROL CIRCUIT
DESCRIPTION
SOP-16
LINEAR INTEGRATED CIRCUIT
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 V
CC
status
ORDERING INFORMATION
Order Number
Lead Free
TL594L-D16-T
-
Halogen Free
TL594G-D16-T
TL594G-S16-R
Package
DIP-16
SOP-16
Packing
Tube
Tape Reel
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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QW-R103-031.C
TL594
MARKING
DIP-16
LINEAR INTEGRATED CIRCUIT
SOP-16
PIN CONFIGURATION
1IN+
1IN-
FEEDBACK
DTC
CT
RT
GND
C1
1
2
3
4
5
6
7
8
16
15
14
2IN+
2IN-
REF
13 OUTPUT CTRL
12
11
10
9
V
CC
C2
E2
E1
PIN NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PIN NAME
1IN+
1IN-
REEDBACK
DTC
CT
RT
GND
C1
E1
E2
C2
VCC
Output CTRL
REF
2IN-
2IN+
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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QW-R103-031.C
TL594
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
FUNCTION TABLE
INPUT
Output CTRL
V
I
= 0
V
I
= V
REF
OUTPUT FUNCTION
Single-Ended or Parallel Output
Normal Push-Pull Operation
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QW-R103-031.C
TL594
PARAMETER
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(unless otherwise specified)
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
41
V
Amplifier Input Voltage
V
IN
V
CC
+ 0.3
V
Collector Output Voltage
V
C1,
V
C2
41
V
Collector Output Current
I
C1,
I
C2
250
mA
Junction Temperature
T
J
+150
°C
Operating Temperature
T
OPR
-40 ~ +85
°C
Storage Temperature
T
STG
-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)
θ
JA
°C/W
SOP-16
64
Note: Maximum power dissipation is a function of T
J(MAX)
,
θ
JA
, and Ta. The maximum allowable power dissipation at
any allowable ambient temperature is P
D
= (T
J(MAX)
-Ta)/θ
JA
. Operating at the absolute maximum T
J
of 150°C
can affect reliability.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
V
CC
V
IN
V
C1
, V
C2
I
C1
, I
C2
l
FB
C
T
R
T
f
OSC
MIN
7
-0.3
TYP.
MAX
40
V
CC
-2
40
200
0.3
10000
500
300
UNIT
V
V
V
mA
mA
nF
kΩ
kHz
Supply Voltage
Amplifier Input Voltage
Collector Output Voltage
Collector Output Current (Each Transistor)
Current Into Feedback Terminal
Timing Capacitor
Timing Resistor
Oscillator Frequency
0.47
1.8
1
ELECTRICAL CHARACTERISTICS
( V
CC
=15V, unless otherwise specified)
MIN
4.95
TYP
5
2
14
2
10
35
10
100
1
50
-2
0.45
3
0
3.3
V
V
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PARAMETER
SYMBOL
TEST CONDITIONS
REFERENCE SECTION
Output Voltage (REF)
V
REF
I
OUT
= 1mA, Ta = 25°C
Input Regulation
∆V
OUT
V
CC
= 7V~40V, Ta = 25°C
Output Regulation
∆V
OUT
I
OUT
= 1~10mA, Ta = 25°C
Output-Voltage Change with
∆Ta
=Min~Max
Temperature
Short-Circuit Output Current (Note)
I
SC
V
REF
= 0V
OSCILLATOR SECTION, C
T
= 0.01μF, R
T
= 12KΩ (See Figure 1)
Frequency
f
OSC
All values of V
CC
, C
T
, R
T
, and
Standard Deviation of Frequency
σf
OSC
(Note)
Ta constant
Frequency Change With Voltage
∆f
OSC
(∆V) V
CC
= 7V ~ 40V, Ta = 25°C
Frequency Change With
∆f
OSC
(∆T)
∆Ta
=Min~Max
Temperature
DEAD-TIME CONTROL SECTION (See Figure 1)
Input Bias Current
I
IB (DT)
V
IN
= 0 ~ 5.25V
Maximum Duty Cycle, Each Output
DC
MAX
DTC = 0V
Zero Duty Cycle
Input Threshold Voltage
V
TH
Maximum Duty Cycle
MAX
5.05
25
35
10
50
UNIT
V
mV
mV
mV/V
mA
kHz
Hz/kHz
Hz/kHz
Hz/kHz
μA
-10
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TL594
ELECTRICAL CHARACTERISTICS(Cont.)
SYMBOL
V
SAT(C)
V
SAT(E)
I
C(OFF)
PARAMETER
OUTPUT SECTION
Collector-Emitter Common Emitter
Saturation Voltage Emitter Follower
Collector Off-State Current
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS
V
E
=0, I
C
=200mA
V
C
=15V, I
E
=−200mA
V
C
=40V, V
E
=0V, V
CC
=40V
DTC and Output CTRL = 0V,
V
C
=15V, V
E
=0V, V
CC
=1~3V
V
CC
=V
C
=40V, V
E
=0
V
IN
=V
REF
MIN
TYP
1.1
1.5
2
4
MAX
1.3
2.5
100
200
UNIT
V
V
μA
μA
Emitter Off-State Current
I
E(OFF)
-100
μA
Output Control Input Current
I
OC
3.5
mA
PWM COMPARATOR SECTION (See Figure 1)
Input Threshold Voltage
V
TH
Zero duty cycle
4
4.5
V
Input Sink Current
I
I(SINK)
FEEDBACK = 0.5V
0.3
0.7
mA
UNDERVOLTAGE LOCKOUT SECTION (See Figure 1)
Ta = 25°C
6
V
Threshold Voltage
V
TH
∆Ta
=Min~Max
3.5
6.9
V
Hysteresis
V
HYS
100
mV
OVERALL DEVICE
R
T
at V
REF
V
CC
= 15V
9
15
mA
All Other Inputs
Standby Supply Current
I
STN-BY
11
18
mA
And Outputs Open V
CC
= 40V
Average Supply Current
DTC = 2V, See Figure 1
12.4
mA
AMPLIFIER SECTION (See Figure 2)
Input Offset Voltage, Error Amplifier
V
I(OFF)
FEEDBACK = 2.5V
2
10
mV
Input Offset Current
I
I(OFF)
FEEDBACK = 2.5V
25
250
nA
Input Bias Current
I
IB
FEEDBACK = 2.5V
0.2
1
μA
0.3 to
Common-Mode Input Voltage
V
ICR
V
V
CC
=7V~40V
V
CC
-2
Range, Error Amplifier
∆V
OUT
=3V, R
L
=2kΩ,
Open-Loop Voltage Amplification
A
VOL
70
95
dB
Gain, Error Amplifier
V
OUT
= 0.5V~3.5V
Unity-Gain Bandwidth
B
W
V
OUT
= 0.5V ~3.5V, R
L
=2kΩ
800
kHz
Common-Mode Rejection Ratio,
CMRR V
CC
= 40V, Ta=25°C
65
80
dB
Error Amplifier
V
ID
=-15mV~-5V,
0.3
0.7
mA
Output Sink Current, FEEDBACK
I
O(SINK)
FEEDBACK = 0.5V
V
ID
= 15mV~5V,
-2
mA
Output Source Current, FEEDBACK I
O(SOURCE)
FEEDBACK = 3.5V
SWITCHING CHARACTERISTICS, Ta = 25°C
Output-Voltage Rise Time
T
r
200
400
ns
Emitter-Follower Configuration
(see Figure 3)
Output-Voltage Fall Time
T
f
45
100
ns
Output-Voltage Rise Time
T
r
100
200
ns
Common-Emitter Configuration
(see Figure 4)
Output-Voltage Fall Time
T
f
30
100
ns
Note: Standard deviation is a measure of the statistical distribution about the mean, as derived from the formula:
σ
=
N
∑
=1
( X
n
- X)
2
n
N-1
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