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參數(shù)資料
| 型號： | L6202 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DMOS FULL BRIDGE DRIVER |
| 中文描述： | DMOS全橋驅(qū)動器 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 174K |
| 代理商： | L6202 |
Boostrap Capacitors
To ensure that thePOWER DMOS transistors are
driven correctly gate to source voltage of typ. 10
V must be guaranteed for all of the N-channel
DMOS transistors. This is easy to be providedfor
the lower POWER DMOS transistors as their
sources are refered to ground but a gate voltage
greater than the supply voltage is necessary to
drivethe upper transistors. This is achieved by an
internal charge pump circuit that guarantees cor-
rectDC drive in combinationwith the boostrap cir-
cuit. For efficient charging the value of the boos-
trap capacitor should be greater than the input
capacitance of the power transistor which is
around 1 nF. It is recommended that a capaci-
tance of at least 10 nF is used for the bootstrap. If
a smaller capacitor is used there is a risk that the
POWER transistors will not be fully turned on and
they will show a higher RDS (ON). On the other
hand if a elevated value is used it is possible that
a current spike may be produced in the sense re-
sistor.
ReferenceVoltage
To by-pass the internal Ref. Volt. circuit it is rec-
ommended that a capacitorbe placedbetween its
pin and ground. A value of 0.22
μ
F should be suf-
ficient for most applications. This pin is also pro-
tected against a short circuit to ground: a max.
current of 2mA max. can be sinked out.
DeadTime
To protect the device against simultaneous con-
duction in both arms of the bridge resulting in a
rail to rail short circuit, the integratedlogic control
providesa deadtime greater than 40 ns.
ThermalProtection
A thermal protection circuit has been included
that will disable the device if the junction tempera-
ture reaches 150
°
C. When the temperature has
fallen to a safe level the device restarts the input
and enablesignals under control.
APPLICATION INFORMATION
Recirculation
During recirculation with the ENABLE input high,
the voltage drop across the transistor is RDS
(ON)
IL, clamped at a voltage depending on the
characteristics of the source-drain diode. Al-
though the device is protected against cross con-
duction, current spikes can appear on the current
sense pin due to charge/dischargephenomenain
the intrinsic source drain capacitances. In the ap-
plication this does not cause any problem be-
cause the voltage spike generated on the sense
resistor is masked by the current controllercircuit.
Rise Time T
r
(SeeFig. 16)
When a diagonal of the bridge is turned on cur-
rent begins to flow in the inductive load until the
maximum current I
L
is reached after a time T
r
.
The dissipatedenergy E
OFF/ON
is in thiscase :
E
OFF/ON
= [R
DS (ON)
I
L2
T
r
]
2/3
Load Time T
LD
(See Fig.16)
During this time the energy dissipated is due to
the ON resistance of the transistors(E
LD
) and due
to commutation (E
COM
). As two of the POWER
DMOS transistorsare ON, E
ON
is given by :
E
LD
= I
L2
R
DS (ON)
2
T
LD
In the commutationthe energydissipated is :
E
COM
= V
S
I
L
T
COM
f
SWITCH
T
LD
Where :
T
COM
= T
TURN-ON
= T
TURN-OFF
f
SWITCH
= Choppingfrequency.
Fall Time T
f
(See Fig. 16)
It is assumed that the energy dissipated in this
part of the cycle takes the same form as that
shown for the rise time :
E
ON/OFF
= [R
DS (ON)
I
L2
T
f
]
2/3
Figure16.
L6201 - L6201P - L6202 - L6203
11/20
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PDF描述 |
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| L6212 | Interface IC |
| L6217 | Industrial Control IC |
| L6217A | Industrial Control IC |
| L6230AH | DC Motor Controller/Driver |
| L6230H | DC Motor Controller/Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6202 | 制造商:STMicroelectronics 功能描述:DMOS FULL BRIDGE DRIVER 6202 DIP |
| L6202_3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| L6202ES | 制造商:STMicroelectronics 功能描述:6202ES |
| L6203 | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 DMOS Full Bridge RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L6203 | 制造商:STMicroelectronics 功能描述:IC DMOS FULL BRIDGE DRIVER 6203 |
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