L6997S Ver la hoja de datos (PDF) - STMicroelectronics
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L6997S Datasheet PDF : 30 Pages
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L6997S
Table 5. Electrical Characteristics (continued)
(VCC = VDR = 3.3V; Tamb = 0°C to 85°C unless otherwise specified)
Symbol
Parameter
Test Condition
CURRENT LIMIT AND ZERO CURRENT COMPARATOR
ILIM Input bias current
RILIM = 2KΩ to 200KΩ
Zero Crossing Comparator offset
Phase-gnd
KILIM Current limit factor
ON TIME
Ton On time duration
VREF=VSENSE OSC=125mV
VREF=VSENSE OSC=250mV
VREF=VSENSE OSC=500mV
VREF=VSENSE OSC=1000mV
OFF TIME
TOFFMIN Minimum off time
KOSC/TOFFMIN
OSC=250mV
VOLTAGE REFERENCE
VREF Voltage Accuracy
0µA < IREF < 100µA
PWM COMPARATOR
Input voltage offset
IFB Input Bias Current
INTEGRATOR
Over Voltage Clamp
VSENSE = VCC
Under Voltage Clamp
VSENSE = GND
Integrator Input Offset Voltage
VSENSE-VREF
IVSENSE Input Bias Current
GATE DRIVERS
High side rise time
High side fall time
VDR=3.3V; C=7nF
HGATE - PHASE from 1 to 3V
Low side rise time
Low side fall time
VDR=3.3V; C=14nF
LGATE from 1 to 3V
PGOOD UVP/OVP PROTECTIONS
OVP
UVP
Over voltage threshold
Under voltage threshold
with respect to VREF
Upper threshold
(VSENSE-VREF)
VSENSE rising
Lower threshold
(VSENSE-VREF)
VSENSE falling
VPGOOD
ISink=2mA
Min. Typ. Max. Unit
4.6
5
5.4
µA
-2
2
mV
1.6
1.8
2
µA
720 800 880
ns
370 420 470
ns
200 230 260
ns
90
115 140
ns
0.20
600
ns
0.40
0.594 0.6 0.606 V
-2
+2
mV
20
nA
0.62 0.75 0.88
V
0.45 0.55 0.65
V
-4
-4
mV
20
nA
50
90
ns
50
100
ns
50
90
ns
50
90
ns
118 121 124
%
67
70
73
%
110 112 116
%
85
88
91
%
0.2
0.4
V
4/30
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