ISL6740A Datasheet, PDF (14/15 Pages) Intersil Corporation – Flexible Double-Ended Voltage-Mode PWM Controller with Voltage Feed Forward

ISL6740A
If the hysteresis resistor, R3, is not desired, the value of the
thermistor resistance at the reset temperature can be
determined from:
R1 = ₂----_.--₅----²_–---^.--⁵¹---₀--^•--_–--^R-₅----²_•----_R-----₂--
Ω
(NTC)
(EQ. 14)
R2 = ₂----_.--₅----²_+---^.--⁵¹----₀-^•--_–--^R-₅----¹_•-----_R----₁--
Ω
(PTC)
(EQ. 15)
Other Uses for OTS
The OTS comparator may also be used to monitor signals
other than as suggested above. It may also be used to
monitor any voltage signal for which an excess requires a
response as described above. Input and output voltage
monitoring are examples of this.
Ground Plane Requirements
Careful layout is essential for satisfactory operation of the
device. A good ground plane must be employed. V_DD and
V_REF should be bypassed directly to GND with good high
frequency capacitance.
14
FN9195.0
February 7, 2005