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參數(shù)資料
| 型號： | SZA1015TT |
| 元件分類： | TVS-瞬態(tài)抑制二極管 |
| 英文描述： | Transient Voltage Suppressor Diodes |
| 中文描述： | 電機控制器 |
| 文件頁數(shù)： | 2/20頁 |
| 文件大?。?/td> | 97K |
| 代理商： | SZA1015TT |
2001 Jul 11
2
Philips Semiconductors
Product specification
Brushless Motor Controller (BMC12)
SZA1015
FEATURES
Direct full bridge driving system
No external series resistor required in motor supply line
Adjustable output current up to 2.1 A (over 20X DVD
and over 50X CD)
D-MOSFET output with a total on-resistance of 0.7
(typical)
PWM controlled commutation
Internal compensation for EMF of motor
(EMF regenerator)
Start/stop function with built-in power saving circuit
Hall amplifiers with a minimum input level of 25 mV
Built-in frequency generator (FG output)
Adjustable motor current limiter
Built-in thermal shutdown
Reverse torque brake function (full bridge)
Built-in reverse rotation protection circuit
32 mA Hall bias circuit
Few external components
Interfaces to 3 V and 5 V logic
Package with very low thermal resistance from junction
to heatsink (reflowable die pad).
GENERAL DESCRIPTION
The BMC12 is a 3-phase Brushless Motor Controller
(BMC)forHallcommutatedspindlemotorsinCD andDVD
drives suitable for DVD speeds over 20X and CD speeds
over 50X.
It uses a 5 V supply for the internal control circuit and a
5 to 12 V supply for the motor driver.
The switching PWM output is highly efficient resulting in a
low power dissipation for forward torque acceleration as
well as for reverse torque brake (PWM controlled reverse
torque).
Sensitive Hall sensor amplifiers with a very low offset are
integrated which can operate on very small Hall signals.
The current limiter circuit requires no external series
resistor in the power ground which increases efficiency.
The limiting current can be adjusted by means of an
external resistor at pin RLIM (not in series with motor
supply line). The current limiter is active during
accelerating as well as during braking.
The EMF voltage of the motor is internally measured and
is used to compensate for the PWM commutation.
A scaling factor can be set by means of an external
resistor at pin REMF.
The tacho-generator can be used to measure the
rotational speed of the disk. It shows the triple frequency
of the Hall signals.
A thermal shutdown circuit with a small hysteresis protects
the IC from overheating.
A heatsink at the bottom of the chip with a very low thermal
resistance enables effective cooling.
The start/stop function reduces current consumption of
the IC to a minimum when the motor is stopped (stop
mode) and also turns off the Hall sensor bias in the stop
mode.
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
SZA1015TT
HTSSOP32
plastic, heatsink thin shrink small outline package; 32 leads;
body width 6.1 mm; lead pitch 0.65 mm
SOT549-1
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