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参数资料
| 型号： | TK740SIL-2727 |
| 厂商： | TOKO INC |
| 元件分类： | 固定正电压多路输出LDO稳压器 |
| 英文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 |
| 封装： | SOT-23, 8 PIN |
| 文件页数： | 21/29页 |
| 文件大小： | 584K |
| 代理商： | TK740SIL-2727 |
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Page 28
January 22, 2002 TOKO, Inc.
TK740xxL
APPLICATION INFORMATION (CONT.)
Variable output voltage. Output voltage controled by an external voltage (power supply, DAC, tec.).
When V
ADJ is raised more than 1.25V, the correspoinding output voltage falls. Because the two sides operate independently,
one side only can be used, if desired.
Forward or reverse: Motor drive circuit.
The direction of the direct current motor rotation changes with the direction of the current. A bridge circuit can be made with
the TK740xx and an external transistor. Each element of the bridge circuit is controlled by an external signal. On/off control
of the bridge elements is accomplished and the desired voltage polarity for the motor is selected. The speed changes in
accordance with the amount of current (voltage) which flows through the motor. The TK740xx has both the switch function
and the variable output voltage function. The motor rotation speed can be controlled by changing the output voltage. The
speed and direction of the motor can be controlled by combining the two functions above. The I/O voltage difference of
TK740xx is approximately 0.17 V at I
OUT = 150 mA. The current when the motor starts is 300 mA Max.
Constant speed (fixed voltage)
Even if the input voltage changes, the voltage
impressed to the motor is constant.
Variable speed (variable voltage)
When V
ADJ is raised more than 1.25 V, the output
voltage falls.
VADJ
VOUTB
8
GND
VIN
6
R = 100 K
VOUTA
CONT B
CONT A
TK
740x
x
VOUTB
8
TK
740x
x
GND
VIN
CL = 0.1
F
VOUTA
CONT (F)
M
CONT
(R)
VOUTB
8
TK
740x
x
GND
VIN
CFB = 0.0047 F
VOUTA
CONT (F)
M
VADJ
CONT
(R)
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