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PDF LB11921T Data sheet ( Hoja de datos )
| Número de pieza | LB11921T | |
| Descripción | Three-Phase Brushless Motor Driver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Ordering number : ENA0604
LB11921T
Monolithic Digital IC
Three-Phase Brushless Motor Driver
http://onsemi.com
Overview
The LB11921T is a pre-driver IC designed for variable-speed control of 3-phase brushless motors. It can be used to
implement a motor drive circuit with the desired output capacity (voltage, current) by using discrete transistors for
the output stage. It implements direct PWM drive for minimal power loss. Since the LB11921T includes a built-in
VCO circuit, applications can control the motor speed arbitrarily by varying the external clock frequency.
Functions
• Direct PWM drive output
• Speed discriminator + PLL speed control circuit
• Speed lock detection output
• Built-in VCO circuit
• Forward/reverse switching circuit
• Braking circuit (short braking)
• Full complement of on-chip protection circuits, including lock protection, current limiter, and thermal shutdown
protection circuits.
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Output current
Allowable power dissipation 1
Symbol
VCC max
IO max
Pd max1
Conditions
UH, VH, WH, UL, VL, WL output
Independent IC
Allowable power dissipation 2
Pd max2
Mounted on a circuit board*
Operating temperature
Topr
Storage temperature
Tstg
* Mounted on a specified board: 114.3mm×76.1mm×1.6mm, glass epoxy.
Ratings
8
10
0.4
0.9
-20 to +80
-55 to +150
Unit
V
mA
W
W
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
11707 MS IM 20060327-S00010 No.A0604-1/18
1 page  
Package Dimensions
unit : mm (typ)
3253B
9.75
36
19
LB11921T
Pd max - Ta
1.2 Mounted on a specified board:
114.3mm×76.1mm×1.6mm, glass epoxy
1.0
0.9
0.8
1
(0.5)
(0.63)
18
0.18
0.15
0.6
Independent IC
0.4
0.2
0.504
0.224
SANYO : TSSOP36(275mil)
0
-20 0
20 40 60 80 100
Ambient Temperature, Ta -°C
ILB01797
Pin Assignment
36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
LB11921T
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Top view
Three-Phase Logic Truth Table (A high (H) input is the state where IN+ > IN–.)
F/R=L
F/R=H
Output
IN1 IN2 IN3 IN1 IN2 IN3 PWM -
1 H L H L H L VH UL
2 H L L L H H WH UL
3 H H L L L H WH VL
4 L H L H L H UH VL
5 L H H H L L UH WL
6 L L H H H L VH WL
No.A0604-5/18
5 Page 
LB11921T
Continued from preceding page.
Pin No.
Symbol
Pin Description
21 RF GND Output current detection reference
Connect to GND of the external resistor Rf.
VCC
Equivalent Circuit
21
22 RF Output current detection
Connect a low resistance resistor Rf between this
VCC
pin and Rf GMD pin.
This resistor sets the maximum output current
IOUT to be 0.26/Rf.
22
23
GND
GND pin
24 UL Outputs (that are used to drive external
25 UH transistors).
26 VL Duty cycle is controlled on the UH, VH, and WH
27 VH side of these output.
28 WL
29 WH
VCC
30
VCC
Power supply
Connect a capacitor between this pin and ground
for stabilization.
31 IN3- Hall-effect device inputs.
32
IN3+
The input is seen as a high-level input when IN+
VCC
33 IN2- > IN-, and as a low-level input for the opposite
34
IN2+
state.
35 IN1- If noise on the Hall-effect device signals is a
36
IN1+
problem, insert capacitors between the
corresponding IN+ and IN- inputs.
500Ω
32 34 36
24 26 28
25 27 29
500Ω
31 33 35
No.A0604-11/18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet LB11921T.PDF ] | |
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