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參數(shù)資料
| 型號(hào)： | L9997ND |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Dual Half Bridge Driver(雙半橋驅(qū)動(dòng)器) |
| 中文描述： | 雙半橋式驅(qū)動(dòng)器（雙半橋驅(qū)動(dòng)器） |
| 文件頁(yè)數(shù)： | 3/9頁(yè) |
| 文件大?。?/td> | 76K |
| 代理商： | L9997ND |
ELECTRICALCHARACTERISTICS
(7V
≤
V
S
≤
16.5V;-40
°
C < T
J
< 150
°
C; unlessotherwisespecified.)
Symbol
I
VS_SB
Parameter
Test Condition
Min.
Typ.
Max.
90
10
6
1.5
6
Unit
μ
A
μ
A
mA
V
V
V
μ
A
V
V
mV
μ
A
μ
A
V
Quiescent Current in Standby
Mode
Supply Current
Low Enable Voltage
High Enable Voltage
Enable Threshold Hysteresis
Enable Input Current
Low Input Voltage
High Input Voltage
Input Threshold Hysteresis
Input Bias Current
V
EN
≤
0.3V; V
VS
≤
16.5V; T
j
≤
85
°
V
EN
= 0; V
VS
=
14.5V; T
j
= 25
°
C
EN = HIGH, I
OUT1,2
= 0
2
3
I
S
V
ENL
V
ENH
V
ENthh
I
EN
V
IN1,2L
V
IN1,2H
V
IN1,2thh
I
IN1,2
3.5
1
V
EN
= 5V
2
110
250
1.5
3.5
1
0
V
IN
= 0
V
IN
= 5V, EN = HIGH
I
OUT
=
±
0.8A; V
VS
= 7V; T
j
= 125
°
C
I
OUT
=
±
0.8A; V
VS
= 12V;T
j
= 125
°
C
I
OUT
=
±
0.8A; V
VS
= 12V; T
j
= 25
°
C
I
DIAG
= 0.5mA, EN = HIGH
Overvoltage or Thermal Shut-
down
Measured with 93
load to ground
-1
2
10
1
50
2.8
2.25
R
ON OUT1,2
ON-Resistance to Supplyor
GND
0.83
V
DIAG
Diagnostic Output Drop
0.6
V
VSOVth
Supply Overvoltage
Threshold
Turn on Delay Time
Turn off Delay Time
Rising Delay Time
Falling Delay Time
Rise Time
Fall Time
17
21
V
t
ON
t
OFF
t
dLH
t
dHL
t
r
t
f
V
S
= 13.5V
50
50
60
60
60
60
150
100
250
250
100
100
μ
s
μ
s
μ
s
μ
s
μ
s
μ
s
FUNCTIONAL DESCRIPTION
The L9997ND is a motor driver with full-bridge
push-pull outputs, intended for driving dc motors
in automotive systems. The basic function of the
device is shown in the followingtable.
Status
1
2
3
4
5
6
EN
L
H
H
H
H
H
IN1
X
H
H
L
L
X
IN2
X
H
L
H
L
X
OUT1
Tristate
SRC
SRC
SNK
SNK
Tristate
OUT2
Tristate
SRC
SNK
SRC
SNK
Tristate
DIAG
OFF
OFF
OFF
OFF
OFF
ON
NOTE
Standby Mode
Recommended for braking
Left Mode
Right Mode
Not to be used for braking
Overvoltage or Overtemperature
Function table of the L9997N The device is acti-
vated with enable input voltageHIGH.
For enable input LOW the device is in Standby
Mode. Very low quiescent current is defined for
V
EN
≤
0.3V.
When activating or disactivating the device by the
enable input a delay time of 100
μ
s is recom-
mended.
For the braking of the motor the status 2 is rec-
ommended, when the motor has stoppedalso the
status 5 with lower lq can be used. The reason for
this recommendationis a higher current threshold
of parasitic initialisation when using the internal
flyback diodes connectedto V
S
thanof the diodes
connectedto GND.
The circuit features an overvoltage disable func-
tion referred to the supply voltage V
S
. This func-
tion assures disabling the output for V
S
higher
than 16.5V, both outputs are forced to tristate in
this conditionand the diagnosticoutput is LOW.
The thermal overload function disables the out-
puts (tristate) and activates the diagnostic when
the junction temperature increases above the
L9997ND
3/9
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