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L6491 数据表(PDF) 8 Page - STMicroelectronics

部件名 L6491
功能描述  Power supply unit
Download  24 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L6491 数据表(HTML) 8 Page - STMicroelectronics

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Electrical characteristics
L6491
8/24
DocID024832 Rev 1
5
Electrical characteristics
5.1
AC operation
Table 7. AC operation electrical characteristics (VCC = 15 V; PGND = SGND; TJ = +25 °C)
Symbol
Pin
Parameter
Test conditions
Min. Typ. Max. Unit
ton
1 vs. 8
3 vs 13
High/low-side driver turn-on
propagation delay
OUT = 0 V
BOOT = VCC
CL = 1 nF
Vi = 0 to 3.3 V
see Figure 3
85
120
ns
toff
High/low-side driver turn-off
propagation delay
85
120
ns
tsd
2 vs.
8, 13
Shutdown to high/low-side
driver propagation delay
85
120
ns
tisd
Comparator triggering to
high/low-side driver turn-off
propagation delay
Measured applying a voltage step from
0 V to 3.3 V to pin CP+; CP- = 0.5 V
175
220
ns
MT
Delay matching, HS and LS
turn-on/off(1)
30
ns
DT
5
Deadtime setting range
see Figure 4
RDT = 0 , CL = 1 nF
0.12 0.18 0.24
µs
RDT = 100 k, CL = 1 nF, CDT = 100 nF
1.2
1.4
1.6
µs
RDT = 200 k, CL = 1 nF, CDT = 100 nF
2.2
2.6
3
µs
MDT
Matching deadtime(2)
RDT = 0 , CL = 1 nF
50
ns
RDT = 100 k, CL = 1 nF, CDT = 100 nF
165
ns
RDT = 200 k, CL = 1 nF, CDT = 100 nF
260
ns
tr
8,13
Rise time
CL = 1 nF
15
40
ns
tf
Fall time
CL = 1 nF
15
40
ns
1. MT = max. (|ton(LVG) - toff(LVG)|, |ton(HVG) - toff(HVG)|, |toff(LVG) - ton(HVG)|, |toff(HVG) - ton(LVG)|).
2. MDT = | DTLH - DTHL | (see Figure 5 on page 14).


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