IR2157 Ver la hoja de datos (PDF) - International Rectifier
Número de pieza
componentes Descripción
Fabricante
IR2157 Datasheet PDF : 20 Pages
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IR2157
ADVANCED INFORMATION
Recommended Operating Conditions
For proper operation the device should be used within the recommended conditions.
Symbol Definition
Min.
Max. Units
VBs
High side floating supply voltage
VS
Steady state high side floating supply offset voltage
VCC
Supply voltage
ICC
Supply current
VDC
VDC lead voltage
VCC - 0.7
VCLAMP
-3.0
600
V
VCCUV+
VCLAMP
note 2
10
mA
0
VCC
V
CT
RDT
IRT
IRPH
IRUN
CT lead capacitance
Deadtime resistance
RT lead current (note 3)
RPH lead current (note 3)
RUN lead current (note 3)
220
1.0
-500
0
0
—
pF
—
kΩ
-50
uA
450
uA
450
uA
ISD
Shutdown lead current
ICS
Current sense lead current
TJ
Junction temperature
-1
1
mA
-1
1
mA
-40
125
oC
Electrical Characteristics
VCC = VBS = VBIAS = 15V +/- 0.25V, RT = 40.0kΩ, CT = 470 pF, RPH and RUN leads no connection, VCPH = 0.0V, RDT =
6.1kΩ, VCS = 0.5V, VSD = 0.0V, CL = 1000pF, TA = 25oC unless otherwise specified.
Supply Characteristics
Symbol Definition
Min.
VCCUV+ VCC supply undervoltage positive going
—
threshold
VCCUV- VCC supply undervoltage positive going
—
threshold
VHYSTUV VCC supply undervoltage lockout hysteresis —
IQCCUV UVLO mode quiescent current
—
IQCCFLT Fault-mode quiescent current (undervoltage —
lockout, shutdown, over-current, over-temp)
IQCC
Quiescent VCC supply current
—
IQCC50K VCC supply current, f= 50kHz
—
VCLAMP VCC zener clamp voltage
—
Typ. Max. Units Test Conditions
11.4
—
VCC rising from 0V
9.6
—
V VCC falling from 15V
1.8
—
150
—
200
—
VCC= 10V rising
µA
3.8
—
4.5
—
15.6 —
RT no connection, CT
connected to COM
mA RT =36kΩ, RDT =
5.6kΩ, CT=220pF
V ICC = 10mA
Note 2:
Note 3:
Enough current should be supplied into the VCC lead to keep the internal 15.6V zener clamp diode on this lead
regulating its voltage.
Due to the fact that the RT input is a voltage-controlled current source, the total RT pin current is sum of all of
the parallel current sources connected to that pin. For optimum oscillator current mirror performance, this total
current should be kept between 50mA and 500mA. During the preheat mode, the total current flowing out of
the RT pin consists of the RPH pin current plus the current due to the RT resistor. During the run mode, the
total RT pin current consists of the RUN pin current plus the the current due to the RT resistor.
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