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參數(shù)資料
| 型號： | L6246 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 12V VOICE COIL MOTOR DRIVER |
| 中文描述： | 12V的音圈電機(jī)驅(qū)動(dòng) |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 103K |
| 代理商： | L6246 |
BLOCK DESCRIPTION
POWERAMPLIFIERS
The two power amplifiers are connectedin bridge
configurationworking in AB class.
SENSE AMPLIFIER
This stage senses the voltage drop across the
Rsense.
The input stage is supplied by the charge pump
voltage to have an high dynamic, while the other
sections of the amplifier are supplied by the volt-
age of 10.5V internally regulated to have an high
power supply rejection (this voltage, suppliesalso
the error amplifier, the input amplifier and the op-
erational amplifier which generatesthe Vcc/2 volt-
age).
The open loop gain is around 80dB and the band-
with is more than 1MHz.
The voltage gain is fixed internallyat 10 V/V.
ERROR AMPLIFIER
This is the stage which compares the input volt-
age and the sense voltage, generatingthe control
voltage for the power section.
The open loop gain and bandwith of this amplifier
are similar to the senseamplifier.
The negative input and the output of the error am-
plifier are accessible externally in order to have
the current loop compensationuser configurable.
The dynamic of the output is limited at +/- 2Vbe to
have a faster responseof the outputvoltage.
INPUT AMPLIFIER
The inputs and the output pins are externally ac-
cessible to have the possibility to configure the
transconductance gain of the current control loop
selectingthe voltagegain of thisamplifier.
The open loop gain and bandwith of this amplifier
are similar to the senseamplifier.
REFERENCE VOLTAGEGENERATOR
This block generates the two reference voltage
Vcc/2
and +5
VREF
.
The Vcc/2 voltage is used as reference by the
current control loop.
The +5VREF is a very stable voltage generator
that can be used as referencevoltage of an exter-
nal
DAC
.
ELECTRICALCHARACTERISTICS
(continued)
Symbol
POWER AMPLIFIER
Rdson
Gdv
Iol
SR
Tsr
GBW
RETRACT
Vr
Vr
CHARGE PUMP
Cs
Vs
Cp
Parameter
Test Condition
Min.
Typ.
Max.
Unit
DMOS on resistance
Differential voltage gain
Output current leakage
Output slew rate
Saturation recovery time
Gain bandwidth product
at 25
°
C
0.3
32
V/V
μ
A
V/
μ
s
μ
s
KHz
500
0.4
5
100
Max. retract voltage
Max. retract voltage
Vcc shorted to GND
Vcc Normal
300
1
mV
V
Storage capacitor
Storage voltage
Pump capacitor
1
μ
F
V
μ
F
Vcc +4
0.2
RETRACT TRUTH TABLE
Input
-Retract
0
1
1
Input
+Enable
X
1
0
Output
Output
+Retract
1
0
0
Bridge Enable
0
1
0
Brake and Retract
Run
Disable
L6246
6/12
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