參數(shù)資料
型號(hào): ISL6742
廠商: Intersil Corporation
英文描述: Octal Buffers/Drivers With 3-State Outputs 20-SSOP -40 to 85
中文描述: 先進(jìn)的雙端PWM控制器
文件頁數(shù): 17/18頁
文件大?。?/td> 422K
代理商: ISL6742
17
FN9183.1
July 25, 2005
Depending on the performance requirements of the control
loop, compensation networks other than shown may be
required.
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.
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.
ISL6742
相關(guān)PDF資料
PDF描述
ISL6742AAZA-T Advanced Double-Ended PWM Controller
ISL6742AAZA Octal Buffers/Drivers With 3-State Outputs 20-SSOP -40 to 85
ISL6744 Octal Buffers/Drivers With 3-State Outputs 20-SOIC -40 to 85
ISL6744AB Octal Buffers/Drivers With 3-State Outputs 20-SOIC -40 to 85
ISL6744ABZ Octal Buffers/Drivers With 3-State Outputs 20-SOIC -40 to 85
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