UTC 51494 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
1
QW-R103-005,A
DESCRIPTION
The UTC 51494 is a monolithic bipolar integrate circuit
that provides both 494 function and built in power good signal
circuit for easy using 51494 can be easily implemented by
just adding a capacitor.
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.
DIP-16
SOP-16
MAXIMUM RATINGS
(Unless otherwise noted ,all is over operating free-air temperature Range)
CHARACTERISTIC SYMBOL
RATING
UNIT
Supply Voltage
Vcc
42
V
Voltage from any pin to ground (except pin8
& pin11)
Vin Vcc+0.3 V
Collector Output Voltage
Vc1, Vc2
42
V
Peak Collector Output
Ic1, Ic2
250
mA
Power dissipation
P
D
1500 mW
Operating Temperature Range
Topr
0 to +70
C
Storage Temperature Range
Tsag
-65 to +150
C
UTC 51494 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
2
QW-R103-005,A
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified , Ta=0~70C ,V
CC
=15V,f=10kHz,)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNIT
Reference Section
Reference voltage
Vref
Iref =1.0mA
4.75
5
5.25
V
Line Regulation
Vline
7V<Vcc<40V
2
25
mV
Load Regulation
Viload
1mA<Iref<5mA
1
15
mV
Temperature Coefficient
0
C <Fa<70C
0.01
0.03
%/
C
Oscillator section
Oscillator Frequency
Fosc
C
T
=0.01
F,R
T
=12k
10
kHz
Oscillator Frequency Change
Over Operating Temperature
Range
fosc C
T
=0.01
F,R
T
=12k
2
%
Dead Time Control Section
Input Bias Current ( Pin 4 )
Iib(dt)
Vcc =15V ; 0V<V4<5.25V
-2
-10
A
Maximum Duty cycle,
Each output
Dc(max) Vcc = 15V; Pin 4 = 0V
Output Control Pin = Vref
43 45 %
Input Threshold Voltage :
Zero Duty
Max
Duty
Vth
0
3
3. 3
V
Error Amplifier Section
Input offset Voltage
Vics
V3=2.5V
2
10
mV
Input offset Current
Iics
V3=2.5V
25
250
nA
Input bias Current
Iib
V3=2.5V
0.2
1
A
Input Common-mode Voltage
Range
Vicr
7V <Vcc< 40V
-0.3
Vcc
V
Large Signal Open-Loop Voltage
Range
Gvo
0.5V < V3 < 3.5V
60
74
dB
Unity-Gain Band width
fc
650
kHz
Output Section
Collector off-state current
Ic(off)
V
CC
=V
C
=40V,V
E
=0
2
100
A
Emitter off-state Current
Ie(off)
V
CC
=V
C
=40V,V
E
=0
-100
A
Output Saturation Voltage
Common-Emitter
Vce(sat) V
E
=15V,Lc=200mA
1.1
1.3
V
Output Control (pin13)
Standby Power Supply Current
Icc
6
10
mA
Output AC Characteristic
Raise Time
Common-Emitter
Tr
100 200 ns
Fall Time
Common-Emitter
Tr
25 100 ns
PWM Comparator Section
Inhibit Threshold Voltage
Vthi
Zero Duty cycle
4
4.5
V
Output Source Current
Io+
0.5V < V3 < 3.5V
2
mA
Output Sink Current
Io-
0.5V < V3 < 3.5V
-0.2
-0.6
mA
UTC 51494 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
3
QW-R103-005,A
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNIT
Power Good Section
Power Good Delay Time
tpd
Cd = 1
230
280
330
ms
Cd = 0.47
108
130
160
Power Fail Lead Time
Tp1
4
ms
Output High Voltage
Voh
Vpinn = 5V, IL = 1mA
4.75
V
Output Saturation Voltage
Vsat
Vpinn = 5V, Isink = 4mA
0.4
V
Output Leakage Current
Ioh
100
A
PIN DESCRIPTION
PIN NAME
FUNCTION
1
EA1+
Error amplifier noninverting input, same as pin 1 of 494
2
EA1-
Error amplifier inverting input, same as pin 2 of 494
3
EA0
Error amplifier output and feedback, same as pin 3 of 494
4
DT
Dead time control input, same as pin 4 of 494
5
CT
Connect capacitor to oscillator circuit for operating frequency, same as pin 5 of 494
6
RT
Connect resistor to oscillator circuit for operating frequency, same as pin 6 of 494
7
GND
Ground terminal of IC, same as pin 7 of 494
8
C1
Collector of output transistor one, same as pin 8 of 494
9
GND
Ground terminal of IC
10
Cpg
Terminal for capacitor to determine power good delay time
11
C2
Collector of output transistor two, same as pin 11 of 494
12
Vcc
Supply voltage, same as pin 12 of 494
13
P.G.
Output for power good signal
14
Vref
Reference voltage output, same as pin 14 of 494
15
EA2-
Error amplifier inverting input, same as pin 15 of 494
16
EA+
Error amplifier noninverting input, same as pin 16 of 494
UTC 51494 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
4
QW-R103-005,A
BLOCK DIAGRAM
Reference
Regulator
Osc
+
-
+
-
+
-
+
-
-
+
TF.E
12
Vcc
14
Ref Out
7
6
5
4
1
2
16
15
3
GND
R
T
C
T
Dead-Time
Control
Non-inv Input
Inv Input
Non Inv Input
Inv Input
Feed-Back
10
13
9
11
8
Dead Time
COMPARATOR
PWM
COMPARATOR
EA1
EA2
1.25V
Cpg
P.G.
C1
C2
GND
UTC 51494 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
5
QW-R103-005,A
51494
1
2
3
14
13 12
11
8
16
15
10
9
6
5
4
7
UCC
1.5K
0.01uF
43K
4.7K
4.7K
2.2U
2.2K
4148
270
12K
0.001U
22K
0.68U
100K
150K
-5U
-12
+5
POWER GOOD
4.7K
4.7K
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