Datasheet > 8932-A

8932-A

更新时间： 2024-02-08 14:29:41

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器电机
页数	文件大小	规格书
8页	165K
描述
VOICE-COIL MOTOR DRIVER

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中文翻译

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数据手册

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8932-A 数据手册

8932-A

VOICE-COIL MOTOR DRIVER

Providing control and drive of the voice-coil motor used for head

positioning in 5 V disk drive applications, the second-generation

A8932CLWA is a full-bridge driver that can be configured so that its

output current is a direct function of an externally applied control

voltage or current. This linear current control function is supplemented

by additional circuitry to protect the heads and the data disk during

system failure or normal system shutdown.

RET REF

RET SET

FLT

SENS

PROTECT

CIRCUIT

–

LOAD

BEMF

GROUND

SENS FB

SGND

SET

OUT

OUT P

The two 500 mA MOS driver outputs provide very low saturation

voltage and minimal power dissipation. Additional headroom is

achieved by the sense-FET structure eliminating the need for an exter-

nal current-sense resistor. Internal circuitry can be configured to

provide closed-loop velocity control of the actuator by utilizing the

generated back-EMF of the voice-coil motor. Thermal protection and

under-voltage lockout disables the system in a controlled sequence if a

fault condition occurs.

LOAD

SUPPLY

OUT

SWITCH

OUT

–

SGND

ACT

–

REF

OUT

2 V

PWR OFF

H GAIN

RETRACT

FAULT

PROTECT

CIRCUIT

REFERENCE

ACT

RESET

SIGNAL

SUPPLY

–

FEATURES

Dwg. PP-042B

I Class-B, 2 Ω r_DS(on)at 500 mA Output

I Lossless Current Sensing

ABSOLUTE MAXIMUM RATINGS

Supply Voltages, V_CCand V_DD............ 6.0 V

Output Current, I_OUT(peak) ........... 600 mA

(continuous) ........................... 500 mA

Analog Input Voltage Range,

V_IN.................................... -0.3 V to V_CC

Logic Input Voltage Range,

I Zero Current-Loop Deadband

I High Transconductance Bandwidth

I User-Adjustable Transconductance Gain

I Digital Transconductance Gain Switch (4:1 Ratio)

I 5 Volt Monitor with Selectable UV Trip Point

I Retract Circuitry Functional to 0 Volts

I Sleep Mode Function

V_IN............................... -0.3 V to +6.0 V

Package Power Dissipation,

P_D......................................... See Graph

I Internal Back-EMF Velocity Loop Option

I Internal Thermal Shutdown Circuitry

Operating Temperature Range,

T_A..................................... 0°C to +70°C

Junction Temperature, T_J............... +150°C^†

Storage Temperature Range,

T_S................................ -55°C to +150°C

† Fault conditions that produce excessive junction

temperature will activate device thermal shutdown

circuitry. These conditions can be tolerated, but

should be avoided.

Output current rating may be restricted to a value

determined by system concerns and factors.

These include: system duty cycle and timing,

ambient temperature, and use of any heatsinking

and/or forced cooling. For reliable operation the

specified maximum junction temperature should

not be exceeded.

Always order by complete part number, e.g., A8932CLWA .

12 3 4 5 6 7 8

中文翻译

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与8932-A相关器件

型号	品牌	获取价格	描述	数据表
8933	NTE	获取价格	50V CERAMIC DISC
89332-0002	MOLEX	获取价格	PCMCIA Connector, 4 Contact(s), 1 Row(s), Male, Right Angle, 0.039 inch Pitch, Surface Mou
8933LEMB120GTN081000	FH	获取价格	GT系列大容量85℃标准螺栓型电解电容器
893-43-064-30-420000	MILL-MAX	获取价格	1mm Grid Surface Mount Connectors
89347	NTE	获取价格	50V CERAMIC DISC
89358	IXYS	获取价格	High Voltage IGBT with Diode
8936	ALLEGRO	获取价格	VOICE COIL MOTOR DRIVER
89361	FCI-CONNECTOR	获取价格	2.00mm IDC 0.2,UM Au
89361-106LF	AMPHENOL	获取价格	Board Connector, 6 Contact(s), 2 Row(s), Female, 0.079 inch Pitch, IDC Terminal, Locking,
89361-108	AMPHENOL	获取价格	Board Connector, 8 Contact(s), 2 Row(s), Female, 0.079 inch Pitch, IDC Terminal, Locking,

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