IR3846 查看數據表（PDF） - International Rectifier
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IR3846
International Rectifier
IR3846 Datasheet PDF : 53 Pages
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IR3846
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNIT
Switch Node
SW Leakage Current
SW = 0V, Enable = 0V
lsw
SW = 0V, Enable =
HIGH, Vp=0 V
1
µA
Internal Regulator (VCC/LDO)
Output Voltage
VCC
Vin(min) = 7.2V, Io=0-
30mA, Cload = 2.2uF, 6.3 6.8 7.1
DCM=0
V
Vin(min) = 7.2V, Io=0-
30mA, Cload = 2.2uF,
4
4.4 4.8
DCM=1
VCC dropout
VCC_drop
Vin = 7V, Io=70 mA,
Cload = 2.2uF
0.7
V
Short Circuit Current
Ishort
Note 4
70
mA
Zero-crossing
Comparator Delay
Tdly_zc
256 /
Fs
s
Zero-crossing
Comparator Offset
Vos_zc
Note 4
0
mV
Body Braking
BB Threshold
BB_threshold
Fb > Vref, Sw duty
cycle, Note 3
0
%
FAULTS
Power Good
Power Good Low Upper
Threshold
VPG_low(upper)
Vsns Rising,
0.4V < Vref < 1.2V
Vsns Rising,
Vref < 0.1V
115 120 125 % Vref
115 120 125 % Vp
Power Good Low Upper
Threshold Falling delay
VPG_low(upper)_Dly
Vsns >
VPG_low(upper)
1.5 2.5 3.5
µs
Power Good High Lower
Threshold
VPG_high(lower)
Vsns Rising,
0.4V < Vref < 1.2V
Vsns Rising,
Vref < 0.1V
95
% Vref
95
% Vp
Power Good High Lower
Threshold Rising Delay
VPG_high(lower)_Dly Vsns rising
1.28
ms
Power Good Low Lower
Threshold
VPG_low(lower)
Vsns falling,
0.4V < Vref < 1.2V
Vsns falling,
0.1V < Vref
90
% Vref
90
%Vp
Power Good Low Lower
Threshold Falling delay
VPG_low(lower)_Dly
Vsns <
VPG_low(lower)
101 150 199
µs
PGood Voltage Low
PG (voltage)
IPGood = -5mA
0.5
V
9 www.irf.com © 2013 International Rectifier
August 01, 2013
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