參數(shù)資料
型號(hào)： LT1336IN
廠商： LINEAR TECHNOLOGY CORP
元件分類： MOSFETs
英文描述： Octal D-Type Edge-Triggered Flip-Flops With 3-State Outputs 20-PDIP 0 to 70
中文描述： 1.5 A HALF BRDG BASED MOSFET DRIVER, PDIP16
封裝： 0.300 INCH, PLASTIC, DIP-16
文件頁(yè)數(shù)： 14/16頁(yè)
文件大小： 365K
代理商： LT1336IN
14
LT1336
most power supplies cannot sink current, this current can
raise the voltage of the high voltage rail. This can be
avoided by placing a discharge resistor between HV sup-
ply and ground to divert the return current to ground as
shown in Figure 5. For a high voltage rail of 40V, a 26k
resistor or smaller should be used, since the top driver will
return about 1.5mA.
For applications where using a discharge resistor is unde-
sirable, use the flyback regulator topology instead of the
boost regulator topology (see Deriving the Floating Supply
with the Flyback Topology).
To drive a DC motor in both directions, two LT1336s can
be used to drive an H-bridge output stage. In this configu-
ration the motor can be made to run clockwise, counter-
clockwise, stop rapidly (“plugging” braking) or free run
(coast) to a stop. A very rapid stop may be achieved by
reversing the current, though this requires more careful
design to stop the motor dead. In practice a closed-loop
control system with tachometric feedback is usually
necessary.
APPLICATIO
S I
FOR
ATIO
U
W
U
U
The motor speed in these examples can be controlled by
switching the drivers with pulse width modulated square
waves. This approach is particularly suitable for micro-
computers/DSP control loops.
Figure 6. 90% Efficiency, 40V to 5V, 10A, Low Dropout Voltage Mode Switching Regulator
V
+
V
+
SWITCH
BOOST
TGATEDR
TGATEFB
TSOURCE
BGATEDR
BGATEFB
PGND
LT1336
I
SENSE
D1
1N4148
D2
1N4148
C
BOOST
1
μ
1336 F05
HV = 40V MAX
+
+
R
SENSE
2
1/4W
R
DISCHRG
24k
*SUMIDA
RCR-664D-221KC
200
μ
H*
10
μ
F
+
–
+
V
BOOST
Figure 5. Driving a Supply Referenced Motor
TYPICAL APPLICATIO
N
S
+
+
+
+
+
+
2.2nF
27k
0.1
μ
F
1k
1k
5k
2k
5V
5400
μ
F
LOW
ESR
1336 F06
1
μ
F
10
μ
F
1
μ
F
1
μ
F
0.022
μ
F
C1
0.1
μ
F
360
510
4.7k
0.33
μ
F
330k
12V
1N4148
1N4148
IRFZ44
IRFZ44
MBR340
*SUMIDA RCR-664D-221KC
**MAGNETICS CORE #55585-A2 30 TURNS 14GA MAGNET WIRE
DALE TYPE LVR-3 ULTRONIX RCS01
IRFZ44
40V
2200
μ
F EA
LOW ESR
R
S
0.007
L2**
70
μ
H
f = 25kHz
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
L1*
200
μ
H
R
SENSE
2
,
1/4W
SWITCH
SWGND
BOOST
TGATEDR
TGATEFB
TSOURCE
PV
+
BGATEDR
LT1336
I
SENSE
SV
+
INTOP
INBOTTOM
UVOUT
SGND
PGND
BGATEFB
SHUTDOWN
+
2N2222
1N4148
0.1
μ
F
4.7k
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
LT3526
1N4148
相關(guān)PDF資料
PDF描述
LT1336IS Octal D-Type Edge-Triggered Flip-Flops With 3-State Outputs 20-SO 0 to 70
LT1339C Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70
LT1339 High Efficiency, Synchronous, 4-Switch Buck-Boost Controller
LT1339CN Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70
LT1339CSW Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70
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