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PDF LB1821M Data sheet ( Hoja de datos )
| Número de pieza | LB1821M | |
| Descripción | Power Brushless Motor Pre-Driver IC for OA Equipment | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Ordering number : EN5686
Monolithic Digital IC
LB1821M
Power Brushless Motor Pre-Driver IC
for OA Equipment
Overview
The LB1821M is a pre-driver IC that supports direct
PWM drive and is appropriate for the power brushless
motors used in office automation equipment. A motor
drive circuit with the desired output capability (voltage
and current characteristics) can be constructed by
attaching a driver array at the IC output. The LB1821M
includes on chip a speed control circuit that allows the
motor speed to be varied using an external clock.
Features
• Direct PWM drive output
• Speed discriminator + PLL speed control circuit
• FG and integrating amplifiers
• Forward/reverse switching circuit
• Braking circuit (short braking)
• Speed lock detection output
• Full complement of on-chip protection circuits,
including lock protection, current limiter, and
thermal shutdown protection circuits.
Package Dimensions
unit: mm
3148-QFP44MA
[LB1821M]
SANYO: QIP44MA
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum input current
Output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
IREG max
IO max
Pd max
Topr
Tstg
Conditions
VREG pin
UL, UV, and WL outputs
Ratings
9
10
30
0.9
–20 to +80
–55 to +150
Unit
V
mA
mA
W
°C
°C
Allowable Operating Ranges at Ta = 25°C
Parameter
Supply voltage
Input current range
FG Schmitt output applied voltage
FG Schmitt output current
Lock detection output current
Symbol
VCC
IREG
VFGS
IFGS
ILD
VREG pin (7 V)
Conditions
Ratings
4.4 to 7.0
1 to 5
0 to 8
0 to 5
0 to 20
Unit
V
mA
V
mA
mA
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
63097HA(OT) No. 5686-1/16
1 page  
LB1821M
Three-Phase Logic Truth Table (A high (H) input is the state where IN+ > IN–.)
Item
1
2
3
4
5
6
F/R=L
IN1 IN2 IN3
HLH
HL L
HH L
LHL
L HH
L LH
F/R=H
IN1 IN2 IN3
LHL
L HH
L LH
HLH
HL L
HH L
Output
Source Sink
VH UL
WH UL
WH VL
UH VL
UH WL
VH WL
S/S Pin
High or open
L
Stop
Start
BRK Pin
High or open
L
Brake
Released
Pin Assignment
No. 5686-5/16
5 Page 
Pin Functions
Pin No.
Pin
LB1821M
Functions
1 INTOUT Integrating amplifier output (speed control)
Equivalent circuit
2 INTIN Integrating amplifier inverting input
Integrating amplifier noninverting input
43 INTREF (a potential of 1/2 VCC)
Speed discriminator output
3 DOUT Outputs a low level for over speed.
Acceleration → high, deceleration → low
Speed control system PLL output
4 POUT Outputs the phase comparison result for
1/2 fCLK and 1/2 fFG.
Speed lock detection output
5
LD
Open collector output
Goes low when the motor speed is within the speed lock
range (±6.25%).
Continued on next page.
No. 5686-11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LB1821M.PDF ] | |
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