Datasheet > 3946

3946

更新时间： 2024-11-26 21:54:19

品牌	Logo	应用领域
急速微 - ALLEGRO		控制器
页数	文件大小	规格书
14页	458K
描述
Half-Bridge Power MOSFET Controller

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3946 数据手册

3946

Half-Bridge Power MOSFET Controller

The A3946 is designed speciﬁcally for applications that require

high power unidirectional dc motors, three-phase brushless dc motors, or

other inductive loads. The A3946 provides two high-current gate drive

outputs that are capable of driving a wide range of power N-channel

MOSFETs. The high-side gate driver switches an N-channel MOSFET

A3946KLB SOIC

VREG

16 VBB

CP2

CP1

PGND

15 VREF

14 DT

that controls current to the load, while the low-side gate driver switches

an N-channel MOSFET as a synchronous rectiﬁer.

LGND

RESET

IN2

A bootstrap capacitor provides the above-battery supply voltage

required for N-channel MOSFETs. An internal charge pump for the

high side allows for dc (100% duty cycle) operation of the half-bridge.

IN1

Scale 1:1

BOOT

~FAULT

The A3946 is available in a choice of two power packages: a

16-lead SOIC with copper batwing power tab (part number sufﬁx LB),

and a 16-lead TSSOP with exposed thermal pad (sufﬁx LP).

A3946KLP TSSOP with Exposed Thermal Pad

VREG

CP2

CP1

PGND

VBB

VREF

LGND

RESET

IN2

IN1

Scale 1:1

BOOT

~FAULT

FEATURES

On-chip charge pump for 7 V minimum input supply voltage

ABSOLUTE MAXIMUM RATINGS

High-current gate drive for driving a wide range of

N-channel MOSFETs

Load Supply Voltage, V_BB............................. 60 V

Logic Inputs ..................................–0.3 V to 6.5 V

Pin S……..........................................–4 V to 60 V

Pin GH ...........................................–4 V to 75 V

Pin BOOT….. ................................–0.6 V to 75 V

Pin DT ........................................................V_REF

Pin VREG ......................................–0.6 V to 15 V

Package Thermal Resistance, R_JA

Bootstrapped gate drive with charge pump for 100% duty cycle

Overtemperature protection

Undervoltage protection

–40ºC to 135ºC ambient operation

A3946KLB..................................... 48°C/W¹

A3946KLB..................................... 38°C/W²

A3946KLP ..................................... 44°C/W¹

A3946KLP..................................... 34°C/W²

Operating Temperature Range, T_A.. –40°C to +135°C

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

Storage Temperature Range, T_S....-55°C to +150°C

Notes:

Always order by complete part number:

1. Measured on a two-sided PCB with 3 in.²of

2 oz. copper.

Part Number

Package

A3946KLB

A3946KLP

16-Lead SOIC; Copper Batwing Power Tab

16-Lead TSSOP; Exposed Thermal Pad

2. Measured on JEDEC standard High-K board.

12 3 4 5 6 7...14

中文翻译

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与3946相关器件

型号	品牌	获取价格	描述	数据表
3946_04	ALLEGRO	获取价格	Half-Bridge Power MOSFET Controller
39478E3	VISHAY	获取价格	Aluminum Capacitors Axial High Temperature, DIN-Based
3948	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
39482-0008	MOLEX	获取价格	Barrier Strip Terminal Block, 1 Row(s), 1 Deck(s), ROHS COMPLIANT
39484-0002	MOLEX	获取价格	Positive-Locking Terminal Block System
39484-0003	MOLEX	获取价格	Positive-Locking Terminal Block System
39484-0004	MOLEX	获取价格	Positive-Locking Terminal Block System
39484-0005	MOLEX	获取价格	Positive-Locking Terminal Block System
39484-0006	MOLEX	获取价格	Positive-Locking Terminal Block System
39484-0007	MOLEX	获取价格	Positive-Locking Terminal Block System

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