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A3938SLDTR PDF预览

A3938SLDTR

更新时间: 2024-09-18 20:09:03
品牌 Logo 应用领域
急速微 - ALLEGRO 电动机控制光电二极管
页数 文件大小 规格书
11页 412K
描述
Brushless DC Motor Controller, PDSO38, MO-153BD-1, TSSOP-38

A3938SLDTR 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:TSSOP包装说明:TSSOP, TSSOP38,.25,20
针数:38Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.36模拟集成电路 - 其他类型:BRUSHLESS DC MOTOR CONTROLLER
JESD-30 代码:R-PDSO-G38JESD-609代码:e0
长度:9.7 mm功能数量:1
端子数量:38最高工作温度:85 °C
最低工作温度:-20 °C封装主体材料:PLASTIC/EPOXY
封装代码:TSSOP封装等效代码:TSSOP38,.25,20
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度(摄氏度):245电源:18/50 V
认证状态:Not Qualified座面最大高度:1.2 mm
子类别:Motion Control Electronics最大供电电流 (Isup):8 mA
最大供电电压 (Vsup):50 V最小供电电压 (Vsup):18 V
表面贴装:YES温度等级:OTHER
端子面层:TIN LEAD端子形式:GULL WING
端子节距:0.5 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:4.4 mm
Base Number Matches:1

A3938SLDTR 数据手册

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A3938  
Three-Phase Power MOSFET Controller  
Features and Benefits  
Description  
Drives a wide range of N-channel MOSFETs  
Low-side synchronous rectification  
Power MOSFET protection  
The A3938 is a three-phase, brushless DC motor controller.  
It has a high-current gate drive capability that allows driving  
of a wide range of power MOSFETs and can support motor  
supply voltages to 50 V. The A3938 integrates a bootstrapped  
high-side driver to minimize the external component count  
required to drive N-channel MOSFET drivers.  
Adjustable dead time for cross-conduction protection  
Selectable coast or dynamic brake on power-down or  
RESET input  
Fast/slow current decay modes  
Internal PWM current control  
Motor lead short-to-ground protection  
Internal 5 V regulator  
Fault diagnostic output  
Thermal shutdown  
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. A user-  
selected external RC timing network sets the fixed off-time  
pulseduration.Foraddedflexibility,thePWMinputcanprovide  
speed/torque control where the internal current control circuit  
sets a limit on the maximum current.  
Undervoltage protection  
Package 38-pin TSSOP (suffix LD):  
The A3938 includes a synchronous rectification feature. This  
shortsoutthecurrentpaththroughthepowerMOSFETreverse  
body diodes during PWM off-cycle current decay. This can  
minimize power dissipation in the MOSFETs, eliminate the  
need for external power clamp diodes, and potentially allow a  
more economical choice for the MOSFET drivers.  
The A3938 provides commutation logic for Hall sensors  
configured for 120-degree spacing. The H-all input pins are  
pulled-up to an internally-generated 5 V reference. Power  
MOSFET protection features include: bootstrap capacitor  
charging current monitor, regulator undervoltage monitor,  
motor lead short-to-ground, and thermal shutdown.  
The LD package is lead (Pb) free, with 100% matte tin plated  
leadframe.  
Approximate Scale 1:1  
RESET  
GLC  
SC  
1
2
38 N/C  
37 N/C  
3
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
22  
21  
20  
PGND  
AGND  
DEAD  
REF  
N/C  
N/C  
GHC  
CC  
4
5
6
7
SENSE  
RC  
8
GLB  
SB  
9
PWM  
BRKSEL  
BRKCAP  
BRAKE  
DIR  
10  
11  
12  
13  
GHB  
CB  
Control  
Logic  
Fault  
GLA  
SA  
GHA 14  
CA 15  
H2  
H3  
VREG 16  
LCAP 17  
N/C 18  
N/C  
H1  
VBB  
FAULT 19  
MODE  
26301.104H  

A3938SLDTR 替代型号

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