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PDF LB1695 Data sheet ( Hoja de datos )
| Número de pieza | LB1695 | |
| Descripción | Three-Phase Brushless Motor Driver | |
| Fabricantes | Sanyo | |
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Ordering number : EN5678
Monolithic Digital IC
LB1695
Three-Phase Brushless Motor Driver
Overview
The LB1695 is a three-phase brushless motor driver IC
that is optimal for DC fan motor drive in home appliances
such as on-demand water heaters.
Features
• Three-phase brushless motor drive
• 45-V voltage handling capacity, 2-A output current
• Current limiter circuit
• Low-voltage protection circuit
• Thermal shutdown protection circuit
• Hall amplifiers with hysteresis characteristics
• FG output function
Package Dimensions
unit: mm
3196-DIP30SD
With a 20% wiring density on
a glass-epoxy board
114.3 × 76.2 × 1.6 mm3
[LB1695]
Ambient temperature, Ta – °C
SANYO: DIP30SD
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Supply voltage
Output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC
VM
IO
Pd max
Topr
Tstg
Conditions
Mounted on a printed circuit board (114.3 × 76.2 × 1.6 mm3
glass-epoxy board)
Ratings
10
45
2.0
2.5
–20 to +100
–55 to +150
Unit
V
V
A
W
°C
°C
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Power-supply voltage range
Maximum power-supply slew rate at power on
VCC
VM
∆VCC/∆t
∆VM/∆t
At VCC = VLVSD(OFF)*
At VM = 0 V*
4.5 to 5.5
5 to 42
No more than 0.04
No more than 0.16
V
V
V/µs
V/µs
Note: *These items are stipulated because output through currents can occur if the speed with which the power-supply voltage rises is too fast when power is
first applied.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
63097HA(OT) No. 5678-1/7
1 page  
Block Diagram and Peripheral Circuits
LB1695
LB1695 Functional Description
1.Hall element input circuits
The Hall element input circuits are differential amplifiers with a hysteresis of about 30 mV (typical). The operating DC
level must be within the common-mode input voltage range (1.5 V to VCC – 1.8 V). We recommend providing input
levels that exceed the hysteresis by at least a factor of three (120 to 160 mVp-p) to assure that circuit operation is not
affected by noise. If the ability to withstand noise is determined to be a problem during noise evaluation or other
testing, insert capacitors (of about 0.01 µF) between the Hall input IN+ and IN– pins.
2.Protection circuit
2.1 Low-voltage protection circuit
The sink side output transistors are turned off if the VCC voltage falls below the stipulated voltage (VLVSD). This
circuit prevents incorrect operation when the VCC voltage is reduced.
2.2 Thermal shutdown circuit
The sink side output transistors are turned off if the junction temperature exceeds the stipulated temperature (TSD).
This circuit prevents the IC from being destroyed by overheating. Applications must be designed so that this circuit
does not operate except in unusual situations.
3.FG output circuit
The LB1695 combines the IN1, IN2, and IN3 inputs and then wave shapes the combined signal. The FG1 output has
the same frequency as the Hall inputs, and the FG2 output has a frequency three times that of the Hall inputs.
4.Forward/reverse control circuit
This circuit was designed with the assumption that the direction will not be switched from the F/R pin while the motor
is turning. If the direction is switched while the motor is turning, through currents will flow in the output and ASO will
become a problem. We recommend only using F/R switching when the VM power supply is in the off state, i.e. with the
motor in the stopped state.
5.VCC and VM power supplies
If the speed with which the power-supply voltages (VCC and VM) rise when power is first applied is too fast, through
currents will flow in the output and ASO will become a problem. Applications must assure that the power supply rise
speeds do not exceed 0.04 V/µs (∆VCC/∆t) and 0.16 V/µs (∆VM/∆t). When applying power, it is desirable to apply
VCC first and then apply VM. When turning the power off, it is desirable to first turn off VM, then to wait for the motor
to stop, and only then turn off VCC. If VCC is turned off after VM is turned off but while the motor is still turning due to
No. 5678-5/7
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LB1695.PDF ] | |
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