UNISONIC TECHNOLOGIES CO., LTD
51494
DESCRIPTION
The UTC
51494
is a monolithic bipolar integrate circuit that
provides same 494 function and built in power good signal
circuit for easy using
51494
can be easily implemented by
just adding a capacitor.
LINEAR INTEGRATED CIRCUIT
FEATURES
* Fully integrated with compact 16-pin dip
* All necessary functions included for most popular half bridge
circuit.
* Built-in power good delay and power fail lead function.
* Power good delay time is linearly.
* Proportional to external capacitor value.
* Reduced external components for cost down and
components for cost down and compact size.
SOP-16
DIP-16
ORDERING INFORMATION
Ordering Number
Lead Free
51494L-S16-R
51494L-S16-T
51494L-D16-T
Halogen Free
51494G-S16-R
51494G-S16-T
51494G-D16-T
Package
SOP-16
SOP-16
DIP-16
Packing
Tape Reel
Tube
Tube
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., LTD
1 of 5
QW-R103-005.Ba
51494
PIN ASSIGNMENT
LINEAR INTEGRATED CIRCUIT
EA1+
EA1-
EA0
D
T
C
T
RT
GND
C1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
EA2+
EA2-
V
REF
P.G.
V
CC
C2
C
PG
GND
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NAME
EA1+
EA1-
EA0
D
T
C
T
R
T
GND
C1
GND
C
PG
C2
V
CC
P.G.
V
REF
EA2-
EA+
FUNCTION
Error amplifier noninverting input, same as pin 1 of 494
Error amplifier inverting input, same as pin 2 of 494
Error amplifier output and feedback, same as pin 3 of 494
Dead time control input, same as pin 4 of 494
Connect capacitor to oscillator circuit for operating frequency, same as pin 5 of 494
Connect resistor to oscillator circuit for operating frequency, same as pin 6 of 494
Ground terminal of IC, same as pin 7 of 494
Collector of output transistor one, same as pin 8 of 494
Ground terminal of IC
Terminal for capacitor to determine power good delay time
Collector of output transistor two, same as pin 11 of 494
Supply voltage, same as pin 12 of 494
Output for power good signal
Reference voltage output, same as pin 14 of 494
Error amplifier inverting input, same as pin 15 of 494
Error amplifier noninverting input, same as pin 16 of 494
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 5
QW-R103-005.Ba
51494
BLOCK DIAGRAM
V
CC
Ref Out
GND
R
T
C
T
Dead-Time
Control
Non-inv Input
Inv Input
Non Inv Input
Inv Input
Feed-Back
12
LINEAR INTEGRATED CIRCUIT
14
7
Reference
Regulator
TF.E
C1
8
C2
11
6
5
Osc
Dead Time
COMPARATOR
+
GND
9
+
4
-
1
2
16
15
3
EA1
+
-
-
PWM
COMPARATOR
-
EA2
+
P.G.
+
-
13
1.25V
10
C
PG
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 5
QW-R103-005.Ba
51494
ABSOLUTE MAXIMUM RATINGS
LINEAR INTEGRATED CIRCUIT
(Unless otherwise specified, all is over operating free-air temperature Range)
CHARACTERISTIC
SYMBOL
RATING
Supply Voltage
V
CC
42
Voltage from any pin to ground (except pin8 & pin11)
V
IN
V
CC
+0.3
Collector Output Voltage
V
C1
, V
C2
42
Peak Collector Output
I
C1
, I
C2
250
Power Dissipation
P
D
1500
Operating Temperature
T
OPR
0 ~ +70
Storage Temperature
T
STG
-40 ~ +150
Junction Temperature
T
J
125
Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
UNIT
V
V
V
mA
mW
℃
℃
℃
damaged.
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, T
A
=0~70℃, V
CC
=15V, f=10kHz)
PARAMETER
REFERENCE SECTION
Reference Voltage
Line Regulation
Load Regulation
Temperature Coefficient
OSCILLATOR SECTION
Oscillator Frequency
Oscillator Frequency Change Over
Operating Temperature Range
DEAD TIME CONTROL SECTION
Input Bias Current ( Pin 4)
Maximum Duty Cycle, Each Output
Zero Duty
Max Duty
ERROR AMPLIFIER SECTION
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Common-mode Voltage Range
Large Signal Open-Loop Voltage Range
Unity-Gain Band width
Input Threshold Voltage
SYMBOL
V
REF
V
LINE
V
ILOAD
TEST CONDITIONS
I
REF
=1.0mA
7V<V
CC
<40V
1mA<I
REF
<5mA
0℃ <F
A
<70℃
C
T
=0.01μF, R
T
=12kΩ
C
T
=0.01μF, R
T
=12kΩ
MIN
4.75
TYP
5
2
1
0.01
10
2
MAX
5.25
25
15
0.03
UNIT
V
mV
mV
%/℃
kHz
%
μA
%
V
F
OSC
Δf
OSC
I
IB(DT)
D
C(MAX)
V
TH
V
CC
=15V, 0V<V4<5.25V
V
CC
= 15V, Pin 4 = 0V
Output Control Pin = V
REF
-2
43
3
0
-10
45
3.3
V
ICS
I
ICS
I
IB
V
ICR
G
VO
f
C
V3=2.5V
V3=2.5V
V3=2.5V
7V <V
CC
< 40V
0.5V < V3 < 3.5V
2
25
0.2
-0.3
60
74
650
10
250
1
V
CC
mV
nA
μA
V
dB
kHz
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 5
QW-R103-005.Ba
51494
ELECTRICAL CHARACTERISTICS(Cont.)
LINEAR INTEGRATED CIRCUIT
PARAMETER
SYMBOL
TEST CONDITIONS
OUTPUT SECTION
Collector Off-State Current
I
C(OFF)
V
CC
=V
C
=40V,V
E
=0
Emitter Off-State Current
I
E(OFF)
V
CC
=V
C
=40V,V
E
=0
Output Saturation Voltage Common-Emitter V
CE(SAT)
V
E
=15V, L
C
=200mA
OUTPUT CONTROL (pin13)
Standby Power Supply Current
I
CC
Output AC Characteristic
Raise Time Common-Emitter
T
R
Fall Time Common-Emitter
T
R
PWM COMPARATOR SECTION
Inhibit Threshold Voltage
V
THI
Zero Duty cycle
Output Source Current
I
O
+
0.5V < V3 < 3.5V
Output Sink Current
I
O
-
0.5V < V3 < 3.5V
POWER GOOD SECTION
C
D
= 1μF
Power Good Delay Time
t
PD
C
D
= 0.47μF
Power Fail Lead Time
T
P1
Output High Voltage
V
OH
V
PINN
= 5V, I
L
= 1mA
Output Saturation Voltage
V
SAT
V
PINN
= 5V, I
SINK
= 4mA
Output Leakage Current
I
OH
MIN
TYP
2
1.1
6
100
25
4
MAX
100
-100
1.3
10
200
100
4.5
UNIT
μA
μA
V
mA
ns
ns
V
mA
mA
2
-0.2
230
108
4.75
-0.6
280
130
4
330
160
ms
ms
V
V
μA
0.4
100
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 5
QW-R103-005.Ba
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