NTE NTE7166

NTE7166
Integrated Circuit
Flyback Switching Regulator
Description:
The NTE7166 is an integrated circuit in a 5 - Lead Staggered TO3P type package and is specifically
designed to satisfy the requirements for increased integration and reliability in off - line quasi- resonant
flyback converters. This device incorporates a primary control and drive circuit with discrete avalanche - rated power MOSFETs.
Cycle - by - cycle current limiting, under - voltage lockout with hysteresis, over - voltage protection, and
thermal shutdown protects the power supply during th normal overload an fault conditions. Over voltge protection and thermal shutdown are latched after a short delay. The latch may be reset by cycling the input supply. Low - current startup and a low - power standby mode selected from the secondary circuit completes a comprehensive suite of features.
Features:
D Flyback Operation with Quasi - Resonant Soft Switching for Low Power Dissipation and EMI
D Rugged Avalanche - Rated MOSFET
D Full Over - Current Protection (No Blanking)
D Under - Voltage Lockout with Hysteresis
D Over - Voltage Protection
D Direct Voltage Feedback
D Low Start - Up Current
D Low - Frequency, Low - Power Standby Operation
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Control Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
Drain - Source Voltage, VDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450V
Drain Switching Current, ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A
Peak Drain Current, IDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26A
Avalanche Energy, EAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327mJ
OCP/FB Voltage Range, VOCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.3V to +6V
Power Dissipation (VIN x IIN(ON)), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8W
FET Channel Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Internal Case Temperature, TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C
Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 20° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 40° to +125°C
Thermal Resistance, Junction - to - Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.75°C/W
Electrical Characteristics: (TA = +25°C, VIN = 18V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
On - State Voltage
VINT
Turn - On, Increasing VIN
14.4
16.0
17.6
V
Under- Voltage Lockout
VINQ
Turn - Off, Decreasing VIN
9
10
11
V
Over - Voltage Threshold
VOVP(th)
Turn - Off, Increasing VIN
20.5
22.5
24.5
V
Drain- Source Breakdown Voltage
VBR(DSS)
ID = 300µA
VDSmax
-
-
V
IDSS
At VDSmax
-
-
300
µA
VS = 10V, ID = 0.9A, TJ = +25°C
-
-
0.58
Ω
VIN = 100Vrms
-
-
145
W
VIN = 120Vrms
-
-
190
W
Drain Leakage Current
On - State Resistance
Output Power
Maximum Off Time
Minimum Pulse Duration for Input of
Quasi- Resonant Signals
Minimum Off Time
Feedback Threshold Voltage
rDS(ON)
POUT
45
-
55
µs
tw(th)
Drain Waveform High, Note 1
-
-
1.0
µs
toff
Drain Waveform High, Note 1
-
-
1.5
µs
Drain Waveform Low to High, Note 1
0.68
0.73
0.78
V
Oscillator Synchronized, Note 2
1.30
1.45
1.60
V
1.20
1.35
1.50
mA
-
-
400
µA
toff
Drain Waveform High
VFDBK
Over - Current Protection/Feedback
Sink Current
IOCP/FB
VOCP/FB = 1.0V
Latch Holding Current
IIN(OVP)
VIN Reduced from 24.5V to 8.5V
Latch Release Voltage
VIN
6.6
-
8.4
V
-
-
250
ns
IIN(ON)
Operating, Note 3
-
-
30
mA
IIN(OFF)
Increasing VIN Prior to Oscillation
-
-
100
µA
2000
-
-
V
140
-
-
°C
tf
Supply Current
Insulation RMS Voltage
Thermal Shutdown
IIN ≤ 20µA, VIN Reduced from 24.5V
VDD = 200V, ID = 0.9A
Switching Time
VWM(RMS) All Terminals Simultaneous reference to a Metal Plate Against the
backside
TJ
Note 1. Feedback is square wave, VIM = 2.2V, th = 1µs, tl = 35µs.
Note 2. For quasi - resonant operation, the input signal must be longer than tw(th) and greater than
VFDBK.
Note 3. Feedback is square wave, VIM = 2.2V, th = 4µs, tl = 1µs.
Pin Connection Diagram
(Front View)
5 GND
4 Supply
3 Drain
2 Source
1 Overcurrent & Feedback
.217 (5.5)
.614 (15.6)
.136 (3.45)
.217
(5.5)
.126
(3.2)
Dia
1
.905
(23.0)
5
.275
(7.0)
.217
(5.5)
.100 (2.54)
.177 (4.5)