參數(shù)資料
型號: LS7362
廠商: LSI Corporation
英文描述: BRUSHLESS DC MOTOR COMMUTATOR/CONTROLLER
中文描述: 無刷直流電機換向器/控制器
文件頁數(shù): 1/6頁
文件大?。?/td> 92K
代理商: LS7362
BRUSHLESS DC MOTOR COMMUTATOR/CONTROLLER
FEATURES:
Speed Control by Pulse Width Modulation (PWM)
of low-side drivers only.
Open or closed loop motor speed control.
+5 to +28 Volt operation (Vss - V
DD
).
Externally selectable input to output code for 60°,
120°, 240°, or 300° electrical sensor spacing.
Three or four phase operation.
Analog Speed control.
Forward/Reverse control.
Output Enable control.
Positive Static Braking.
Overcurrent Sensing.
Six outputs drive switching bridge directly.
LS7362 (DIP); LS7362-S (SOIC);
LS7362-TS (TSSOP) - See Connection Diagram
DESCRIPTION:
The LS7362 is a monolithic, ion implanted MOS circuit de-
signed to generate the signals necessary to control a three
phase or four phase brushless DC motor. It is the basic
building block of a brushless DC motor controller. The cir-
cuit responds to changes at the SENSE inputs, originating
at the motor position sensors, to provide electronic com-
mutation of the motor windings. Pulse width modulation
(PWM) of low-side drivers for motor speed control is ac-
complished through either the ENABLE input or through
the V TRIP input (Analog Speed control) in conjunction with
the OSCILLATOR input. Overcurrent circuitry is provided
to protect the windings, associated drivers and power sup-
ply. The LS7362 circuitry causes the external output driv-
ers to switch off immediately upon sensing the overcurrent
condition, and on again only when the overcurrent condi-
tion disappears and the positive edge of either the EN-
ABLE input or the sawtooth OSCILLATOR occurs. This lim-
its the overcurrent sense cycling to the chopping rate of the
ENABLE input or the sawtooth OSCILLATOR. A positive
braking feature is provided to effect rapid deceleration. The
LS7362 is designed for driving Bipolar and Field Effect
Transistors. Because only low-side drivers are pulse width
modulated, the LS7362 is ideally suited in situations where
the integrated circuit interfaces with level converters to
drive high voltage brushless DC motors. By pulse width
modulating the low-side drivers only, the switch losses in
the level conversion circuitry for the high-side drivers is
minimized. Figure 1 indicates how the level conversion is
accomplished.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
L
CS1
OUT 1
OUT 2
OUT 3
OUT 4
COMMON
OUT 5
OUT 6
BRAKE
ENABLE
CS2
FORWARD/REVERSE
V
DD
(-V)
S3
S2
S1
OSCILLATOR
V TRIP
OVERCURRENT SENSE
V
SS
(+V)
L
CONNECTION DIAGRAM
- TOP VIEW
STANDARD 20 PIN PLASTIC DIP
The COMMON, Pin 5, is tied to the positive supply rail
and LS7362 Outputs 1, 2, and 3 are used to drive level
converters Q101, Q102 and Q103 respectively. Only the
motor top side drivers consisting of Q107, Q108 and
Q109 which are connected to the motor power supply,
V
M
, will be subject to the high speed switching currents
that flow through the motor. The level converters are
turned on and off at the slower commutation rate.
INPUT/OUTPUT DESCRIPTION:
COMMUTATION SELECTS (Pins 1, 20)
These inputs are used to select the proper sequence of
outputs based on the electrical separation of the motor
position sensors. With both inputs low (logic zero), the
sequence is adjusted for 60° electrical separation, with
CS2 high and CS1 low 120° separation sequence is se-
lected, with CS1 high and CS2 low 240° separation se-
quence is selected and with CS1 and CS2 high the 300°
separation sequence is selected. Note that in all cases
the external output drivers are disabled for invalid
SENSE input codes. Internal pull down resistors are pro-
vided at Pins 1 and 20 causing a logic zero when these
pins are left open.
September 1999
7362-041100-1
LSI/CSI
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405
UL
LS7362
A3800
相關(guān)PDF資料
PDF描述
LS7366R 32-BIT QUADRATURE COUNTER WITH SERIAL INTERFACE
LS7534 DIMMER LIGHT SWITCH WITH UP AND DOWN CONTROLS
LS7535 DIMMER LIGHT SWITCH WITH UP AND DOWN CONTROLS
LS7538 TOUCH CONTROL STEP DIMMER LIGHT SWITCH WITH AUTOMATIC GAIN CONTROL (AGC)
LS7539 TOUCH CONTROL STEP DIMMER LIGHT SWITCH WITH AUTOMATIC GAIN CONTROL (AGC)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LS7362-S 制造商:LSI Computer Systems Inc 功能描述:Motor Controller Circuit, 20 Pin, SOP 制造商:LSI Corporation 功能描述:Motor Controller Circuit, 20 Pin, SOP
LS7366 制造商:LSI 制造商全稱:LSI 功能描述:32 BIT QUADRATURE COUNTER WITH SERIAL INTERFACE
LS7366R 制造商:LSI 制造商全稱:LSI 功能描述:32-BIT QUADRATURE COUNTER WITH SERIAL INTERFACE
LS73-680-RM 制造商:ICE 制造商全稱:ice Components, Ins. 功能描述:Surface Mount Power Inductors
LS73-681-RM 制造商:ICE 制造商全稱:ice Components, Ins. 功能描述:Surface Mount Power Inductors