参数资料
型号: IRDC3831
厂商: International Rectifier
文件页数: 14/31页
文件大小: 0K
描述: BOARD EVAL SYNC BUCK CONVERTER
产品变化通告: (EP) Parts Discontinuation 25/May/2012
标准包装: 1
系列: SupIRBuck™
主要目的: DC/DC,步降
输出及类型: 1,非隔离
输出电压: 0.75V
电流 - 输出: 8A
输入电压: 12V
稳压器拓扑结构: 降压
频率 - 开关: 400kHz
板类型: 完全填充
已供物品:
已用 IC / 零件: IR3831
IR3831MPbF
Thermal Shutdown
Temperature sensing is provided inside IR3831.
The trip threshold is typically set to 140 o C. When
trip threshold is exceeded, thermal shutdown
turns off both MOSFETs and discharges the soft
start capacitor.
Automatic restart is initiated when the sensed
temperature drops within the operating range.
There is a 20 o C hysteresis in the thermal
Power Good Output
The IC continually monitors the output voltage via
Feedback (Fb pin). The feedback voltage is
compared to a fixed voltage. As soon as the Fb
voltage reaches 0.515 V, the Power Good signal
flags. This pin is open drain and it needs to be
externally pulled high. High state indicates that
output is in regulation. Fig 8. shows the timing
diagram for the PGood function.
shutdown threshold.
TIMING DIAGRAM OF PGOOD FUNCTION
Fig.8a IR3831 Non-Tracking Operation
Fig.8b IR3831 Tracking Operation
11/05/10
14
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