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参数资料
| 型号： | LB1897H |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO34 |
| 封装： | 0.375 INCH, HSSOP-28 |
| 文件页数： | 7/11页 |
| 文件大小： | 159K |
| 代理商： | LB1897H |
LB1897H
No.8804-5/11
Pin Functions
Pin name
Pin no.
Functions
FGIN (+)
9
Non-inverted input pin when FG amp is used as a differential input.
Internal bias application is not made.
FG-CLIP
10
Soft clip control pin of FG amplifier.
C-connection or direct connection of this pin and FG-IN “-“ enables application of soft clip.
FG-OUT
11
FG amp output pin, which functions as an internal resistance load.
CTL
12
Speed control pin. Control is a constant-current drive with current return made from Rf.
Gm = 0.65A/V & 1.50A/VTYP at Rf = 0.5
LIM
13
Current limiting function control pin. This pin voltage enables linear change of the output current.
Gradient = 0.5A/VTYP at Rf = 0.5
FC
14
Frequency characteristics compensation pin for speed control loop.
UIN+, UIN-
VIN+, VIN-
WIN+, WIN-
15, 16
17, 18
19, 20
U-phase hall device input pin. “H” of logic means IN+>IN-.
V-phase hall device input pin. “H” of logic means IN+>IN-.
W-phase hall device input pin. “H” of logic means IN+>IN-.
VCC
21
Power pin for power supply to each circuit other than the output block in IC. This voltage must be stabilized to
prevent entry of ripple and noise.
VS
22
Power pin of the output block.
Rf (PWR)
Rf (SNS)
24
4
Output current detection pin. Connection of Rf between this pin and GND causes current return to the control block.
The lower over-saturation preventive circuit and torque ripple compensation circuit are activated with this pin voltage.
In particular, as the lower over-saturation preventive level is set, extreme lowering of the Rf value causes the lower
over-saturation prevention less effective in the large current range. Be sure to connect PWR and SENSE pins.
UOUT
VOUT
WOUT
27
28
1
U-phase output pin.
V-phase output pin.
(Spark killer Di incorporated)
W-phase output pin.
GSENSE
5
GND sensing pin.
Connection of this pin to GND near the Rf resistor side of the motor GND wiring including Rf enables elimination of
the effect of GND common impedance on Rf. (Do not keep it OPEN.)
FR
6
Forward/backward selector pin.
With this pin voltage, forward/backward can be selected.
(Vth = 2.5VTYP at VCC = 5V)
GND
7, 23
GND other than output transistor.
The minimum potential of output transistor is at the Rf pin.
FGIN (-)
8
Input pin to use the FG amp with inverted input. Return resistor to be connected relative to FTG-OUT.
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