Mode Controller. NTE1765 Datasheet

NTE1765 Controller. Datasheet pdf. Equivalent

Part NTE1765
Description Integrated Circuit Dual Channel Current Mode Controller
Feature NTE1765 Integrated Circuit Dual Channel Current Mode Controller Description: The NTE1765 is a high p.
Manufacture NTE
Datasheet
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NTE1765
NTE1765
Integrated Circuit
Dual Channel Current Mode Controller
Description:
The NTE1765 is a high performance, fixed frequency, dual current mode controller in a 16–Lead DIP
type package. This device is specifically designed for Off–Line and DC to DC converter applications
offering the designer a cost effective solution with minimal external components. The NTE1765 fea-
tures a unique oscillator for precise duty cycle limit and frequency control, a temperature compen-
sated reference, two high gain error amplifiers, two current sensing comparators, drive output 2 en-
able pin, and two high current totem pole outputs ideally suited for driving power MOSFETS.
Also included are protective features consisting of input and reference undervoltage lockouts each
with hysteresis, cycle–by–cycle current limiting, and a latch for single pulse metering of each output.
Features:
D Unique Oscillator for Precise Duty Cycle Limit and Frequency Control
D Current Mode Operation to 500kHz
D Automatic Feed Forward Compensation
D Separate Latching PWMs for Cycle–By–Cycle Current Limiting
D Internally Trimmed Reference with Undervoltage Lockout
D Drive Output 2 Enable Pin
D Two High Current Totem Pole Outputs
D Input Undervoltage Lockout with Hysteresis
D Low Start–Up and Operating Current
Absolute Maximum Ratings:
Total Power Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Zener Current, IZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Output Current, Source or Sink (Note 1), IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Output Energy (Capacitive Load per Cycle), W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0µJ
Current Sense, Enable and Voltage Feedback Inputs, Vin . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +5.5V
Sync Input, High State (Voltage), VIH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V
Sync Input, Low State (Reverse Current), IIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –5.0mA
Error Amp Output Sink Current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
Maximum Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.25mW
Thermal Resistance, Junction–to–Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100°C/W
Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Note 1. Maximum package power dissipation limits must be observed.



NTE1765
Electrical Characteristics: (VCC = 15V (Note 2), RT = 8.2k, CT = 3.3nF, Note 3 unless otherwise
specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Reference Section
Reference Output Voltage
Line Regulation
Load Regulation
Total Output Variation over Line,
Load and Temperature
Vref
Regline
Regload
Vref
IO = 1mA, TJ = +25°C
VCC = 11V to 15V
IO = 1mA to 10mA
4.9 5.0 5.1 V
2.0 20 mV
3.0 25 mV
4.85 5.15 V
Output Short Circuit Current
Oscillator and PWM Sections
ISC
30 100 mA
Total Frequency Variation over Line
and Temperature
fOSC VCC = 11V to 15V, TA = 0° to +70°C 46.5 49.0 51.5 kHz
Frequency Change with Voltage
Duty Cycle at each Output
Maximum
Minimum
Sync Input Current
High State
Low State
Error Amplifiers
fOSC/V VCC = 11V to 15V
DCmax
DCmin
IIH Vin = 2.4V
IIL Vin = 0.8V
0.2 1.0 %
46.0 49.5 52.0
––0
%
%
170 250 µA
80 160 µA
Voltage Feedback Input
Input Bias Current
OpenLoop Voltage Gain
Unity Gain Bandwidth
Power Supply Rejection Ratio
Output Current
Source
Sink
Output Voltage Swing
High State
Low State
Current Sense Section
VFB
IIB
AVOL
BW
PSRR
VO = 2.5V
VFB = 5V
VO = 2V to 4V
TJ = +25°C
VCC = 11V to 15V
ISource
ISink
VO = 3V, VFB = 2.3V
VO = 1.2V, VFB = 2.7V
VOH RL = 15k to GND, VFB = 2.3V
VOL RL = 15k to Vref, VFB = 2.7V
2.42 2.50 2.58 V
– –0.1 1.0 µA
65 100 dB
0.7 1.0 MHz
60 90 dB
0.45
2.0 1.0
mA
mA
12 mA
5.0 6.2
0.8 1.1
V
V
Current Sense Input Voltage Gain
Max. Current Sense Input Threshold
Input Bias Current
Propagation Delay (Current Sense
Input to Output
AV Note 4, Note 5
Vth Note 4
IIB
tPLN(IN/OUT)
2.75 3.00 3.25
430 480 530
– –2 10
150 300
V/V
mV
µA
ns
Note 2. Adjust VCC above the StartUp threshold before setting to 15V.
Note 3. For typical values, TA = +25C; for Min/Max values, TA = 0° to +70°C. Low duty cycle pulse
techniques are used during test to maintain junction temperature as close to ambient as pos-
sible.
Note 4. This parameter is measured at the latch trip point with Vfb = 0V.
V Compensation
Note 5. Comparator gain is defined as AV = V Current Sense







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