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参数资料
| 型号： | LB1952M |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.3 A, PDSO36 |
| 封装： | MFP-36 |
| 文件页数： | 6/11页 |
| 文件大小： | 173K |
| 代理商： | LB1952M |
Control Function & Current Limit Function
Pin Functions
The pin numbers in ( ) are for MFP.
Pin name
Pin No.
Function
FR
1 (33)
Forward/reverse select pin. The pin voltage selects forward/reverse.
(Vth = 2.5 V typ at VCC =5V)
GND
2 (34)
GND for other than output transistor. Minimum potential of output transistor is at Rf pin.
FGin (–)
5 (3)
Input pin when FG amplifier is used with inverted input. Feedback resistor is connected between
this pin and FG-OUT.
FGin (+)
6 (4)
Noninverting input pin when FG amplifier is used with differential input. Internal bias is not applied.
FG-OUT
8 (5)
FG amplifier output pin. Resistive load provided internally.
CTL
9 (6)
Speed control pin. Control is exercised by constant-current drive with current feedback applied from
Rf. Gm = 0.58 A/V typ at Rf=0.5
CTLREF
10 (7)
Control reference voltage pin. The voltage is set internally to approx. 0.43 x VCC but this can be
varied by applying voltage through a low impedance (input impedance = approx. 4.3 k).
LIM
11 (8)
Current limiting function control pin. The output current is varied linearly by this pin voltage; slope
= 0.5 A/V typ at Rf = 0.5 .
FC
12 (9)
Speed control loop frequency characteristic correction pin
Uin
+, Uin–
Vin
+,Vin–
Win
+, Win–
13, 14 (10, 11)
15, 16 (12, 13)
17, 18 (14, 15)
U-phase Hall device input pin; logic ‘‘H’’ represent IN+ > IN.
V-phase Hall device input pin; logic ‘‘H’’ represent IN+ > IN.
W-phase Hall device input pin; logic ‘‘H’’ represent IN+ > IN.
VCC
19 (16)
Power supply pin for supplying power to all circuits except output section in IC; this voltage must
be stabilized so as to eliminate ripple and noise.
VS
22 (21)
Output section power supply pin
ADJ
23 (22)
Pin for external adjustment of torque ripple correction factor. When this factor is to be adjusted, a
voltage is externally applied to the ADJ pin through a low impedance. If the voltage applied is
increased, the factor drops; conversely, if it is reduced, the factor rises. The factor varies between
0 and 2 times that of the open state. (The voltage is set to approx. VCC/2 internally, and the input
impedance is approx. 5 k.)
Rf (PWR)
Rf (SNS)
24 (23)
33 (31)
Output current detection pin. Current feedback is applied to the control section by connecting Rf
between this pin and GND. The lower oversaturation prevention circuit and torque ripple correction
circuit are activated in accordance with this pin voltage. Since the oversaturation prevention level
is set with this voltage, the lower oversaturation prevention effect may deteriorate in the high
current range if the Rf value is reduced to an extremely low level. The PWR and SENSE pins must
always be connected.
Uout
Vout
Wout
27 (26)
29 (27)
31 (28)
U-phase output pin
V-phase output pin
W-phase output pin
(Built-in spark killer diode)
GSENSE
34 (32)
GND sensing pin. By connecting this pin to the neighboring GND on the Rf resistor side of the motor
GND wire which contains Rf, the effect that GND common impedance exerts on Rf can be
eliminated. (This pin must not be left open.)
Control characteristics
Current limit characteristics
Slope = 0.5 A/V typ
LB1952, 1952M
No.5132 - 4/11
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