ISL6742AAZA Intersil, ISL6742AAZA Datasheet - Page 17

• Manufacturer Part Number: ISL6742AAZA
• Description: IC CTRLR PWM DOUBLE ENDED 16QSOP
• Manufacturer: Intersil

Specifications of ISL6742AAZA

• Pwm Type: Voltage/Current Mode
• Number Of Outputs: 4
• Frequency - Max: 2MHz
• Duty Cycle: 100%
• Voltage - Supply: 9 V ~ 16 V
• Buck: No
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 16-QSOP
• Frequency-max: 2MHz
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Fault Conditions
A fault condition occurs if VREF or VDD fall below their
undervoltage lockout (UVLO) thresholds or if the thermal
protection is triggered. When a fault is detected, the soft-start
capacitor is quickly discharged, and the outputs are disabled
low. When the fault condition clears and the soft-start voltage
is below the reset threshold, a soft-start cycle begins.
An overcurrent condition is not considered a fault and does
not result in a shutdown.
17
ISL6742
Thermal Protection
Internal die over temperature protection is provided. An
integrated temperature sensor protects the device should
the junction temperature exceed +140°C. There is
approximately +15°C of hysteresis.
Ground Plane Requirements
Careful layout is essential for satisfactory operation of the
device. A good ground plane must be employed. VDD and
VREF should be bypassed directly to GND with good high
frequency capacitance.
References
[1] Ridley, R., “A New Continuous-Time Model for Current
Mode Control”, IEEE Transactions on Power
Electronics, Vol. 6, No. 2, April 1991.
October 31, 2008
FN9183.2