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IR21531 Datasheet(PDF) 4 Page - International Rectifier

Part No. IR21531
Description  SELF-OSCILLATING HALF-BRIDGE DRIVER
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Maker  IRF [International Rectifier]
Homepage  http://www.irf.com
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IR21531 Datasheet(HTML) 4 Page - International Rectifier

   
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IR21531D(S) & (PbF)
4
www.irf.com
Floating Supply Characteristics
Electrical Characteristics
VBIAS (VCC, VBS) = 12V, CL = 1000 pF, CT = 1 nF and TA = 25°C unless otherwise specified. The VIN, VTH and IIN
parameters are referenced to COM. The VO and IO parameters are referenced to COM and are applicable to the
respective output leads: HO or LO.
Symbol Definition
Min.
Typ.
Max.
Units Test Conditions
VCCUV+
Rising VCC undervoltage lockout threshold
8.1
9.0
9.9
VCCUV-
Falling VCC undervoltage lockout threshold
7.2
8.0
8.8
VCCUVH
VCC undervoltage lockout Hysteresis
0.5
1.0
1.5
IQCCUV
Micropower startup VCC supply current
75
150
VCC ≤ VCCUV-
IQCC
Quiescent VCC supply current
500
950
VCLAMP
VCC zener clamp voltage
14.4
15.6
16.8
V
ICC = 5mA
Low Voltage Supply Characteristics
V
µA
Symbol Definition
Min.
Typ.
Max.
Units
Test Conditions
fosc
Oscillator frequency
19.4
20
20.6
RT = 36.9kΩ
94
100
106
RT = 7.43k
d
RT pin duty cycle
48
50
52
%
fo < 100kHz
ICT
CT pin current
0.001
1.0
uA
ICTUV
UV-mode CT pin pulldown current
0.30
0.70
1.2
mA
VCC = 7V
VCT+
Upper CT ramp voltage threshold
8.0
VCT-
Lower CT ramp voltage threshold
4.0
VCTSD
CT voltage shutdown threshold
1.8
2.1
2.4
VRT+
High-level RT output voltage, VCC - VRT
10
50
IRT = 100µA
100
300
IRT = 1mA
VRT-
Low-level RT output voltage
10
50
IRT = 100µA
100
300
IRT = 1mA
VRTUV
UV-mode RT output voltage
0
100
VCC ≤ VCCUV-
VRTSD
SD-Mode RT output voltage, VCC - VRT
10
50
IRT = 100µA,
VCT = 0V
10
300
IRT = 1mA,
VCT = 0V
Oscillator I/O Characteristics
V
mV
Symbol Definition
Min.
Typ.
Max.
Units
Test Conditions
IQBSUV
Micropower startup VBS supply current
0
10
VCC ≤ VCCUV-
IQBS
Quiescent VBS supply current
30
50
VBSMIN
Minimum required VBS voltage for proper
4.0
5.0
V
VCC=VCCUV+ + 0.1V
functionality from RT to HO
ILK
Offset supply leakage current
50
µAVB = VS = 600V
VF
Bootstrap diode forward voltage (IR21531D)
0.5
1.0
V
IF = 250mA
µA
kHz


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