PWM Controller. NTE1729 Datasheet

NTE1729 Controller. Datasheet pdf. Equivalent

Part NTE1729
Description Integrated Circuit Pulse Width Modulator (PWM) Controller
Feature NTE1729 Integrated Circuit Pulse Width Modulator (PWM) Control Circuit Description: The NTE1729 is a.
Manufacture NTE
Datasheet
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NTE1729
NTE1729
Integrated Circuit
Pulse Width Modulator (PWM) Control Circuit
Description:
The NTE1729 is an inverter control unit in a 16–Lead DIP type package which provides all the control
circuitry for PWM type switching regulators. Included in this device is the voltage reference, dual error
amplifiers, oscillator, pulse width modulator, pulse steering flip flop, dual alternating output switches,
and dead time control.
Features:
D Complete PWM Power Control Circuit
D Adjustable Dead Time: 0 to 100%
D No Double Pulsing of Same Output during Load Transient Condition
D Dual Error Amplifiers have Wide Common Mode Input Voltage Capability: –0.3V to VCC –2V
D Circuit Architecture Provides Easy Synchronization
D Uncommitted Outputs for 250mA Sink or Source
D With Miss–Operation Prevention Circuit for Low Level Supply Voltage
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41V
Error Amplifier Input Voltage, VICM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC +0.3V
Output Voltage, VCER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41V
Total Power Dissipation (TA = +25°C), PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000mW
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +85°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Recommended Operating Conditions:
Parameter
Supply Voltage
Output Voltage
Output Current
Error Amplifier Sink Current
Timing Capacitor
Timing Resistance
Oscillation Frequency
Operating Temperature
Symbol
VCC
VCER
IC
IOAMP
CT
RT
fosc
Topt
Min
7
–0.3
0.47
1.8
1
–20
Typ Max Unit
– 40 V
– 40 V
– 200 mA
– –0.3 mA
– 10000 nF
– 500 k
– 300 kHz
– +70 °C



NTE1729
Electrical Characteristics: (VCC = +15V, f = 10kHz, 20° ≤ TA +70°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Coefficient
ShortCircuit Output Current
Oscillator Section
Vref
REGIN
REGL
Vref
Ishort
Iref = 1mA, TA = +25°C
7V VCC 40V, Iref = 1mA,
TA = +25°C
1mA Iref 10mA, TA = +25°C
20° ≤ TA +85°C, Iref = 1mA
Vref = 0, TA = +25°C, Note 2
4.75 5.0 5.25 V
8 25 mV
1 15 mV
0.01 0.03 %/°C
50 mA
Frequency
Standard Deviation of Frequency
Frequency Change with Temperature
Frequency Change with Voltage
Dead–Time Control Section
fOSC
CT = 0.01µF, RT = 12k, TA = +25°C
7V VCC 40V, CT, RT, Const.,
TA = +25°C, Note 1
0° ≤ TA +70°C, CT = 0.01µF,
RT = 12k
7V VCC 40V, CT = 0.01µF,
RT = 12k, TA = +25°C
10 kHz
10
%
12%
– –1%
Input Bias Current
Maximum Duty Cycle (Each Output)
Input Threshold Voltage
0 VI 5.25V
VI = 0
Vth Zero Duty Cycle
Maximum Duty Cycle
– –2 10 µA
45 49
%
3.0 3.3 V
0 –– V
Error Amplifier Section
Input Offset Voltage
Input Offset Current
Input Bias Current
Common Mode Input
Voltage
Low
High
OpenLoop Voltage Amplification
Unity Gain Bandwidth
Common Mode Rejection Ratio
Output Sink Current
Output Source Current
PWM Section
VIO
IIO
VICM
VOAMP = 2.5V
VOAMP = 2.5V
VOAMP = 2.5V
7V VCC 40V
AV
CMRR
VOAMP = 0.5V to 3.5V, TA = +25°C
TA = +25°C
VCC = 40V, TA = +25°C
VOAMP = 0.7V
VOAMP = 3.5V
2 10 mV
25 250 nA
0.2 1.0 mA
0.3 – – V
VCC2 – – V
60 80 dB
500 830 kHz
65 80 dB
0.3 0.7 mA
2 10 mA
Input Threshold Voltage
Zero Duty Cycle
4.0 4.5 V
Input Sink Current
Output Section
V(Pin3) = 0.7V
0.3 0.7 mA
Collector Cutoff Current
Emitter Cutoff Current
Collector Saturation Voltage
ICER VCE = 40V, VCC = 40V
2 100 µA
VCC = VC = 40V
– – –100 µA
VCE(sat) IC = 200mA, VE = 0, Common Emitter
0 0.95 1.3 V
VCE(on) IE = 200mA, VC = 15V, Emitter Follower 1.6 2.5 V







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