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TL1451 友顺UTC 电子元器件芯片.pdf
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TL1451 友顺UTC 电子元器件芯片
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UNISONIC TECHNOLOGIES CO., LTD
TL1451
LINEAR INTEGRATED CIRCUIT
1 of 14
Copyright © 2015 Unisonic Technologies Co., Ltd
QW-R103-011.F
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 UTC 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.
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
DIP-16
SOP-16
TSSOP-16
ORDERING INFORMATION
Ordering Number
Lead Free Halogen Free
Package Packing
TL1451L-D16-T TL1451G-D16-T DIP-16 Tube
- TL1451G-P16-R TSSOP-16 Tape Reel
- TL1451G-S16-R SOP-16 Tape Reel
MARKING
DIP-16 SOP-16 / TSSOP-16
TL1451 LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 2 of 14
QW-R103-011.F
PIN CONFIGURATION
CT
RT
1 IN+
1 IN-
1 FEEDBACK
1 DTC
1 OUT
GND
V
CC
2 OUT
2 DTC
2 IN-
SCP
REF
2 IN+
2 FEEDBACK
ERROR
AMPLIFIER 1
ERROR
AMPLIFIER 2
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
BLOCK DIAGRAM
TL1451 LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 3 of 14
QW-R103-011.F
ABSOLUTE MAXIMUM RATINGS (T
A
=25C, unless otherwise specified)
PARAMETER SYMBOL VALUE UNIT
Supply Voltage V
CC
51 V
Amplifier Input Voltage V
IN
20 V
Collector Output Voltage V
OUT
51 V
Collector Output Current I
OUT
21 mA
DIP-16 1000
SOP-16 500
Power Dissipation
TSSOP-16
P
D
700
mW
Junction Temperature T
J
+125 C
Operating Temperature T
OPR
-20 ~ +85 C
Storage Temperature T
STG
-40 ~ +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.
RECOMMENDED OPERATING CONDITIONS
PARAMETER SYMBOL MIN TYP MAX UNIT
Supply Voltage V
CC
3.6 50 V
Amplifier Input Voltage V
IN
1.05 1.45 V
Collector Output Voltage V
OUT
50 V
Collector Output Current(each Transistor) I
OUT
20 mA
Current into Feedback Terminal I
FB
45 μA
Feedback Resistor R
F
100 kΩ
Timing Capacitor C
T
150 15000 pF
Timing Resistor R
T
8 100 kΩ
Oscillator frequency F
OSC
1 350 kHz
Operating Temperature T
OPR
-20 85 C
ELECTRICAL CHARACTERISTICS (V
CC
=6V, f=200kHz, T
a
=25C, unless otherwise specified.)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Reference Section
Output Voltage V
OUT
I
OUT
=1mA 2.4 2.5 2.6 V
T
a
= -20C ~ 25C -0.1 1
Output Voltage Change with Temperature
T
a
= 25C ~ 85C -0.2 1
%
Input Voltage Regulation △V
IN
Vcc=3.6V ~ 40V 2 12.5 mV
Output Voltage Regulation △V
OUT
I
OUT
=0.1mA ~ 1mA 1 7.5 mV
Short-Circuit Output Current I
OUT
V
OUT
=0 3 10 30 mA
Undervoltage Lockout Section
Upper 2.72 V
Threshold Voltage (Vcc)
Lower
V
THR
2.6 V
Hysteresis (Vcc) V
HYS
120 mV
Reset Threshold voltage (Vcc)
I
OUT(REF)
=0.1mA
1.5 1.9 V
Short-Circuit Protection Control Section
Input Threshold Voltage(SCP) V
IN(THR)
0.60 0.67 0.75 V
Standby Voltage(SCP) V
STN-BY
No pullup 140 185 230 mV
Latched Input Voltage (SCP) V
IN(LAT)
No pullup 60 120 mV
Input (source) Current I
IN(source)
V
IN
=0.7V -10 -15 -20 μA
Comparator Threshold Voltage (FEEDBACK) V
THR
1.18 V
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