NTE NTE7002

NTE7002
Integrated Circuit
Switched Mode Power Supply Control
Description:
The NTE7002 is a bipolar integrated circuit in a 9–Lead SIP type package that drives, regulates, and
monitors the switching transistor in a power supply based on the ringing choke flyback principle.
Due to the wide regulating range and the high voltage stability during large load changes, SMPS for
Hi–Fi equipment and active loudspeakers can be realized as well as applications in TV receivers and
video recorders.
Features:
D Wide Operational Range
D High Voltage Stability Even at High Load Changes
D Direct Control of Switching Transistor
D Low Start–Up Current
D Linear Foldback of the Overload Characteristic
D Base Drive Proportional to the Current Through the Power Switching Transistor
D Stand–By Mode 3.5W into the External Load
D Inhibit Capability (TTL Compatible)
D Undervoltage Lockout
Absolute Maximum Ratings:
Supply Voltage, V9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
Sink Output Voltage
V7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V9V
V7–V8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6V
Reference Output, I1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10 to +1.0mA
Zero Crossing, I2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –3.0 to +3.0mA
Control Amplifier, I3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –3.0 to 0mA
Collector Current, I4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –2.0 to +5.0mA
Trigger Input, I5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –2.0 to +3.0mA
Sink Output, I7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.5A
Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C
Thermal Resistance, Junction–to–Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +70°C/W
Thermal Resistance, Junction–to–Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15°C/W
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Voltage
V9
–
15
18
V
Ambient Temperature
TA
–15
–
+85
°C
V9 = 3.0V
–
–
0.5
mA
V9 = 5.0V
–
1.5
2.0
V9 = 10V
–
2.0
3.2
Start Operation (TA = +25°C)
Current Consumption
(V1 Not Yet Switched)
I9
Turn–On Point for V1
V9
11.3
11.8
12.3
V
V4 Before Start–Up (V9 < 11.8V)
V4
6.0
6.7
–
V
Vreg = –10V
110
135
160
mA
Vreg = 0
55
85
110
I1 < 0.1mA
4.0
4.2
4.5
I1 = 5.0mA
4.0
4.2
4.4
TC1
–
100
–
ppm/°C
V4
1.8
2.08
2.5
V
IPin3 = 5.0µA
4.0
4.2
4.5
V
IPin3 = 1.3mA
–
2.4
3.0
IPin3 = 1.3mA
–
3.7
4.0
VPin3 Fold Back
IPin3 = 0.5mA
–
2.5
3.0
VPin3 Overload Decision
IPin3 = 1.0µA
–
2.4
2.9
–
2.11
–
–
1.0
–
VPin3 = 1.5V
–
0.4
–
VR = 0V (Full Fold Back)
–
3.5
–
VR = –10V (Regulation)
–
4.0
–
VR = –15V (Stand–By)
–
5.0
–
VR = 0V
–
1.4
–
VR = –10V
–
1.45
–
VR = –15V
–
1.57
–
Regulation Mode (V9 = 15V, TA = +25°C)
Current Consumption
Reference Voltage
Reference Voltage Temperature
Coefficient
VPin4 Low Static Voltage
VPin4 Regulation Peak Voltage
VPin3 Full Fold Back
I9
V1
V4(peak)
V3
VPin3 Regulation
VPin3 IPin3 Regulation
I3
VPin3 IPin3 Leakage
VPin7 Peak High
VPin7 Peak Low
V7(peak)
V7(peak)
V
V
µA
V
V
IPin7 Sink Peak
I7(peak)
VR = –15V
–
+0.7
–
A
IPin8 Source Peak
I8(peak)
VR = –15V
–
–0.8
–
A
IPin2 = –3.0mA
–
–0.3
–
V
IPin2 = –0.3mA
–
–0.2
–
IPin2 = +3.0mA
–
+0.7
–
IPin2 = +0.3mA
–
+0.8
–
VPin2
V2
Protective Operation (V9 = 15V, TA = +25°C)
Current Consumption
I9
V5 < 1.8V
14
20
26
mA
Turn–Off Voltage
V7
V5 < 1.8V
1.3
1.5
1.8
V
1.8
2.1
2.5
V4
Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Enable Voltage, Vreg = 0V
–
2.2
2.4
V
Disable Voltage, Vreg = 0V
2.0
2.2
–
6.7
7.4
7.8
V
6.5
7.3
7.8
V
µA
Protective Operation (Cont’d) (V9 = 15V, TA = +25°C)
External Trigger Input
Supply Voltage Disabling
V8 amd V1
VPin5 Zener Voltage
IPin5
V5
V19
V5
Pin5 Open
I5
VPin5 = 3.0V
–
1.4
–
VPin5 = 0V
–
–11
–
–
350
450
ms
S3 = Closed, ∆P3 = 19W
–
100
500
mV
S2 = Closed, ∆P2 = 15W
–
500
1000
S1 = Open
–
20
30
V
70
75
–
kHz
–
10
15
VA
Turn–On Time (Secondary Voltages)
ton
Voltage Change
∆V2
Stand–By Operation
(Minimum Secondary Power: 3W)
Switching Frequency During
Stand–By Mode
Primary Power Consumption
During Stand–By Mode
∆V2
f
Pprim
The Heat Sink Must Be Optimized, Taking the Maximum
Data (TJ, RΘJC, TA) into
Consideration
Pin Connection Diagram
(Front View)
9
VCC
8
Source Output
7
Sink Output
6
GND
5
Shut Down
4
Sawtooth Generator
3
Feedback
2
Zero Detection
1
Reference
.897 (23.0)
.874 (22.2)
.143 (3.65)
.135 (3.54)
.377
(9.6)
.260
(6.6)
1
.100 (2.54)Typ
9
.106
(2.7)
.165 (4.2) Min
ALL Dimensions are Max.