Datasheet > 3933

3933

更新时间： 2024-09-14 22:13:47

品牌	Logo	应用领域
急速微 - ALLEGRO		控制器
页数	文件大小	规格书
12页	169K
描述
THREE-PHASE POWER MOSFET CONTROLLER

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3933 数据手册

3933

THREE-PHASE POWER

MOSFET CONTROLLER

The A3933SEQ is a three-phase MOSFET controller for use with

bipolar brushless dc motors. It drives all n-channel external power

FETs, allowing system cost savings and minimizing r_(DS)onpower loss.

The high-side drive block is implemented with bootstrap capacitors at

each output to provide the floating positive supply for the gate drive.

The high-side circuitry also employs a unique “intelligent” FET

monitoring circuit that ensures the gate voltages are at the proper levels

before turn-on and during the ON cycle. This device is targeted for

applications with motor supplies from 12 V to 28 V.

29 SENSE

28 RC

GHC

GLB

PWM

26 BRKSEL

25 BRKCAP

GHB

Internal fixed off-time PWM current-control circuitry can be used to

regulate the maximum load current to a desired value. The peak load-

current limit is set by the user’s selection of an input reference voltage

and external sensing resistor. The fixed off-time pulse duration is set

by a user-selected external RC timing network.

BRAKE

GLA

19 DIR

22 H2

21 H3

GHA

A power-loss braking circuit brakes the motor on an under-voltage

condition. The device is configured to either coast or dynamically

brake the motor when this occurs.

Dwg. PP-068

The A3933SEQ is supplied in a 32-lead rectangular (9 x 7) plastic

chip carrier (quad pack) for minimum-area, surface-mount applica-

tions.

ABSOLUTE MAXIMUM RATINGS

at T_A= 25°C

FEATURES AND BENEFITS

Supply Voltage, V_BB............................. 28 V

(peak) .............................................. 30 V

I Drives External N-Channel FETs

I Intelligent High-Side Gate Drive

I Selectable Coast or Dynamic Brake on Power Down

I Adjustable Dead Time for Cross-Conduction Protection

I Selectable Fast or Slow Current-Decay Modes

I Internal PWM Peak Current Control

I Reset/Coast Input

Terminal Voltage, V_CCOUT................. 13.2 V

(peak) .............................................. 15 V

Logic Input Voltage Range,

V_IN.................. -0.3 V to V_LCAP+ 0.3 V

Sense Voltage Range,

V_SENSE............................. -5 V to V_LCAP

Output Voltage Range,

V_SA, V_SB, V_SC.................. -5 V to +30 V

V_GHA, V_GHB, V_GHC. -5 V to V_BB+ 14 V

V_CA, V_CB, V_CC..................... V_SX+ 14 V

I 120° Hall Commutation with Internal Pullup

I Internal 5-V Regulator

I Low-Side Synchronous Rectification

I Direction Control

I PWM Speed-Control Input

I Fault-Diagnostic Output

Operating Temperature Range,

T_A................................. -20°C to +85°C

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

Storage Temperature Range,

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

I Under-Voltage Protection

12 3 4 5 6 7...12

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39-33-3026	MOLEX	获取价格	Rectangular Power Connector, 2 Contact(s), Male, Solder Terminal, LEAD FREE
39-33-3027	MOLEX	获取价格	Rectangular Power Connector, 2 Contact(s), Male, Solder Terminal, LEAD FREE
39-33-3029	MOLEX	获取价格	Rectangular Power Connector, 2 Contact(s), Male, Solder Terminal, LEAD FREE
39-33-3043	MOLEX	获取价格	Rectangular Power Connector, 4 Contact(s), Male, Solder Terminal, LEAD FREE
39-33-3044	MOLEX	获取价格	Rectangular Power Connector, 4 Contact(s), Male, Solder Terminal, LEAD FREE
39-33-3063	MOLEX	获取价格	Rectangular Power Connector, 6 Contact(s), Male, Solder Terminal, LEAD FREE
39-33-3064	MOLEX	获取价格	Rectangular Power Connector, 6 Contact(s), Male, Solder Terminal, LEAD FREE
39-33-3066	MOLEX	获取价格	Rectangular Power Connector, 6 Contact(s), Male, Solder Terminal, LEAD FREE
39-33-3083	MOLEX	获取价格	Rectangular Power Connector, 8 Contact(s), Male, Solder Terminal, LEAD FREE
39-33-3108	MOLEX	获取价格	Rectangular Power Connector, 10 Contact(s), Male, Solder Terminal, LEAD FREE

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