L6996 查看數據表（PDF） - STMicroelectronics
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L6996 Datasheet PDF : 26 Pages
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L6996
ELECTRICAL CHARACTERISTICS
(VCC = VDR = 5V; Tamb = 0°C to 70°C unless otherwise specified)
Symbol
Parameter
Test Condition
SUPPLY SECTION
Vin Input voltage range
Vout=1V Fsw=110Khz Iout=1A
Vcc, VDR
Vccoff Turn-off voltage
VHYST UVLO Hysteresys
Iqcc Quiescent current driver
(VDR)
VFB- > VFB+
Iqcc Quiescent current
(Vcc)
VFB- > VFB+
SHUTDOWN SECTION
SHDN SHDN Threshold
ISH Driver quiescent current in
(VDR) shutdown.
SHDN to GND
ISH (Vcc) Shut down current
SHDN to GND
SOFT START SECTION
ISS SS charge current
Soft-start active range
ON TIME
Ton On time duration
Vprog=CS- =1.15 Osc=250mV
Vprog=CS-=1.15 Osc=500mV
Vprog=CS-=1.15 Osc=1V
Vprog=CS-=1.15 Osc=2V
OFF TIME
Minimum Off Time
KOSC/TOFFMIN
OSC=250mV VPROG=CS-=1.15V
DAC
Vprog Voltage Accuracy
VID0-4 see table 1
PWM COMPARATOR
Input voltage offset
VPROG=1.6V=VFB-
IVFB- Input bias current (VP)
VVFB- =1.6V
CURRENT LIMIT AND ZERO CURRENT COMPARATOR
ILIM ILIM input bias current
CS-=VPROG=1.6V
ILIM to GND = 120KΩ
KC Positive and negative Current
Limit factor.
RILIM = 120 KΩ
PHASE- Zero Crossing Comparator offset
GND
GATE DRIVERS
High side rise time
High side fall time
VDR=5V; C=7nF
HGATE - PHASE from 2 to 4.5V
Low side rise time
Low side fall time
PROTECTIONS
OVP Over voltage trip
CS- rising
Min. Typ. Max. Unit
1
28
V
4.5
5.5
V
4.1
4.3
V
60
90
100 mV
20
µA
600
µA
0.6
1.2
V
5
µA
15
µA
4
6
µA
0.9
V
720 800 880
ns
355 420 485
ns
210 250 290
ns
120 150 180
ns
580
ns
0.28
-1
+1
%
-2
+2
mV
4
5
6
µA
4.95
µA
0.18 0.3 0.24 µA
-2
2
mV
50
70
ns
50
70
ns
50
70
ns
50
70
ns
117 120 123
%
4/26
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