UTCTL1451 [UTC]
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS; 双脉宽调制控制电路
| 型号： | UTCTL1451 |
| 厂家： | 
Unisonic Technologies |
| 描述： | DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| 文件： | 总5页 (文件大小：130K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UTC TL1451
LINEAR INTEGRATED CIRCUIT
DUAL PULSE-WIDTH-MODULATION
CONTROL CIRCUITS
DESCRIPTION
The UTC TL1451 incorporates on a single monolithic chip
all the functions required in the construction of two pulse-
width-modulation (PWM) control circuits. Designed primarily
for power supply control, the TL1451 contains an on-chip 2.5V
regulator, two error amplifiers, an adjustable oscillator, two
dead-time comparators, undervoltage lockout circuitry, and
dual common –emitter output transistor circuits.
SOP-16
DIP-16
FEATURES
*Complete PWM Power control Circuitry
*Completely Synchronized Operation
*Internal Undervoltage Lockout Protection
*Wide Supply Voltage Range
*Internal Short-Circuit Protection
*Oscillator Frequency …500kHz Max
*Variable Dead Time Provides Control Over Total Range
*Internal Regulator Provides a Stable 2.5V Reference Supply
PIN CONFIGURATIONS
CT
1
16
15
REF
SCP
2
3
4
5
6
7
8
RT
ERROR
AMPLIFIER
1
1 IN+
1 IN-
14 2 IN+
ERROR
AMPLIFIER
2
13
12
11
10
9
2 IN-
1 FEEDBACK
2 FEEDBACK
2 DTC
1 DTC
1 OUT
GND
2 OUT
Vcc
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R103-011,A
UTC TL1451
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
UTC UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R103-011,A
UTC TL1451
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS(Unless otherwise noted all is over operating free air temperature
range)
PARAMETER
SYMBOL
VALUE
51
UNIT
V
Supply Voltage
VCC
VI
Amplifier Input Voltage
Collector Output Voltage
Collector Output Current
Power Dissipation : TA£25°C
DIP
20
V
VO
IO
51
V
21
mA
mW
1000
500
SOP
Operating free-air Temperature Range
Storage Temperature Range
Lead Temperature 1.6mm from Case for 10
Sec.
TA
-20 TO 85
-65 TO 150
260
°C
°C
°C
Tstg
Tcase
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VALUE
UNIT
MIN
3.6
MAX
50
Supply Voltage
Vcc
Vi
V
V
Amplifier Input Voltage
Collector Output Voltage
Collector Output Current(each Transistor)
Current into Feedback Terminal
Feedback Resistor
1.05
1.45
50
Vo
Io
V
20
mA
mA
kW
pF
kW
kHz
°C
45
RF
CT
RT
100
150
5.1
1
Timing Capacitor
15000
100
500
85
Timing Resistor
Oscillator frequency
Operating Free-Air Temperature
TA
-20
ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range,VCC=6V,f=200kHz,TA=25°C ,Unless otherwise
specified)
PARAMETER
Reference Section
TEST CONDITIONS
MIN
2.4
TYP
MAX UNIT
Output Voltage
Io=1mA
2.5
-0.1
-0.2
2
2.6
±1%
±1%
12.5
7.5
V
Output Voltage Change with Temperature
TA=-20°C to 25°C
TA=25°C to 85°C
Vcc=3.6V to 40V
Io=0.1mA to 1mA
Vo=0
Input Voltage Regulation
mV
mV
mA
Output Voltage Regulation
1
Short-Circuit Output Current
Undervoltage Lockout Section
Upper Threshold Voltage (Vcc)
Lower Threshold Voltage (Vcc)
Hysteresis (Vcc)
3
10
30
2.72
2.6
V
V
Io(ref)=0.1mA, TA=25°C
TA=25°C
80
120
1.9
mV
V
Reset Threshold voltage (Vcc)
Short-Circuit Protection Control Section
Input Threshold Voltage(SCP)
1.5
0.65
0.7
0.75
V
UTC UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R103-011,A
UTC TL1451
LINEAR INTEGRATED CIRCUIT
PARAMETER
TEST CONDITIONS
No pullup
MIN
140
TYP
185
60
MAX UNIT
Standby Voltage(SCP)
230
120
-20
mV
mV
mA
V
Latched Input Voltage (SCP)
Input (source) Current
No pullup
VI=0.7V,TA=25°C
-10
-15
Comparator Threshold Voltage (FEEDBACK)
Oscillator Section
1.18
Frequency
CT=330pF, RT=10kW
CT=330pF, RT=10kW
Vcc=3.6V to 40V
200
10%
1%
kHz
Standard deviation of frequency
Frequency Change with Voltage
Frequency Change with Temperature
TA=-20°C to 25°C
TA=25°C to 85°C
-0.4%
-0.2%
±2%
±2%
Dead-Time Control Section
Input bias Current (DTC)
1
mA
mA
V
Latch mode (source) Current (DTC)
Latched Input Voltage (DTC)
TA=25°C
Io=40mA
-80
2.3
-145
Input threshold Voltage at f=10kHz (DTC)
Zero duty cycle
Maximum duty cycle
2.05
1.45
2.25
V
1.2
Error-Amplifier Section
Input Offset Voltage
Vo (FEEDBACK)=1.25V
Vo (FEEDBACK)=1.25V
Vo (FEEDBACK)=1.25V
Vcc=3.6V to 40V
±6
mV
nA
nA
V
Input Offset Current
±100
500
Input Bias current
160
Common-Mode Input Voltage Range
1.05 to
1.45
70
Open-loop Voltage Amplification
Unity-gain Bandwidth
RF=200kW
80
1.5
80
dB
MHz
dB
Common-mode Rejection Ratio
Positive Output Voltage Swing
60
Vref-
0.1
V
Negative Output Voltage Swing
Output (sink) Current (FEEDBACK)
Output (source) Current (FEEDBACK)
Output Section
1
V
VID=-0.1V,Vo=1.25V
VID=-0.1V,Vo=1.25V
0.5
-45
1.6
-70
mA
mA
Collector off-state Current
Output Saturation Voltage
Short-Circuit Output Current
PWM Comparator Section
Input Threshold Voltage at
f=10kHz (FEEDBACK)
Vo=50V
Io=10mA
Vo=6V
10
2
mA
V
1.2
90
mA
Zero duty cycle
Maximum duty cycle
2.05
1.45
2.25
V
1.2
TOTAL DEVICE
Standby Supply Current
Off-state
1.3
1.7
1.8
2.4
mA
mA
Average Supply Current
RT=10kW
UTC UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R103-011,A
UTC TL1451
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
TIMING DIAGRAM
UTC UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R103-011,A
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