NTE7096 & NTE7097
Integrated Circuit
Current Mode Pulse Width Modulator (PWM)
Control Circuit
Description:
The NTE7096 and NTE7097 are integrated circuits in 8鈥揕ead DIP type packages that incorporate a
new precision temperature鈥揷ontrolled oscillator with an internally trimmed discharge current to mini-
mize variations in frequency. A precision duty鈥揷ycle clamp eliminates any need for an external oscil-
lator when at, or near, a 50% duty鈥揷ycle condition. Duty鈥揷ycles greater than 50% are also possible.
Special logic ensures that V
ref
is stabilized before the output stage is enabled. Ion鈥搃mplant resistors
provide tighter control of under鈥搗oltage lockout.
Other features include low start鈥搖p current, pulse鈥揵y鈥揷urrent limiting, and high鈥揷urrent totem pole
output for driving capacitive loads, such as the gate of a power MOSFET. The output is low in the
off state, consistent with N鈥揷hannel devices.
Features:
D
Optimized for Off鈥揕ine Control
D
Internally Trimmed Temperature Compensated Oscillator
D
Maximum Duty鈥揅ycle Clamp
D
V
ref
Stabilized before Output Stage is Enabled
D
Low Start鈥揢p Current
D
Pulse鈥揵y Pulse Current Limiting
D
Improved U/V Lockout
D
Double Pulse Suppression
D
1% Trimmed Bandgap Reference
D
High Current Totem Pole Output
Absolute Maximum Ratings:
Supply Voltage (I
CC
< 30mA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Self Limiting
Supply Voltage (Low Impedence Source) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
鹵1A
Output Energy (Capacitive Load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5碌J
Analog Inputs (Pin2, Pin3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V to V
CC
Error Amp Output Sink Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
1
2
3
